AARoads Forum

You probably don't have actual numbers for this. I'd be impressed if you do, so do your best guess. You can divide this into travel to/from the state itself as well as net travel everyone over the border even if they drive straight through the state without stopping. For Massachusetts this doesn't make much of a difference.

For Massachusetts:

1. New Hampshire: tons of tourist traffic going up as well to Maine even Vermont in all seasons of the year. Lots of cross border traffic. Lots of commuters and shoppers as well

2. Rhode Island: Less long-distance travel besides New Yorkers going to the Cape, but with Providence right across the border and a lot of density nearby.

3. Connecticut: Probably the most long-distance travel, lots of New York travel and Hartford/Springfield area traffic. Not higher as the area near the border isn't that dense besides Springfield.

4. New York: Long-distance travel from the state to Upstate New York and the Midwest. There is not a whole ton of traffic on the border on I-90. Also New Yorkers going to the Berkshires

5. Vermont: Most Massachusetts-Vermont travel goes through New Hampshire. Mostly traffic between Western Mass and Vermont, which isn't much. Also some New York tourist traffic to Vermont though many probably take I-87.

For Indiana:

1. Illinois- I-80/94 and the Indiana Toll Road to Chicago. Loads of semis, tourist and commuter traffic on one highway.

2. Michigan- mainly I-94 with semi and tourist traffic!

3. Ohio- I-70 (truck traffic) and the Ohio Turnpike!

4. Kentucky- Bridge crossings (Louisville mainly).

You can often find AADT data from state highway departments. If you're looking for the highest numbers, they're likely to be state highways. For California, here are the data from 2022, the latest I could find:

  100 CA-167 NV
  110 CA-299 NV
  140 CA-266 NV north
  300 CA-266 NV south
  380 CA-182 NV
  790 CA-127 NV
  820 US-395 OR
  950 CA-178 NV
 1270 US-6 NV
 2450 CA-905 Mexico
 2650 US-95 NV
 3250 CA-139 OR
 3400 CA-186 Mexico
 3700 US-97 OR
 4200 US-395 NV Topaz Lake
 4450 CA-88 NV
 4700 US-199 OR
 7800 CA-188 Mexico
 8000 CA-62 AZ
 8930 US-101 OR
10400 CA-28 NV
12600 US-395 NV Truckee River
17000 I-40 AZ
17300 I-5 OR
17600 CA-7 Mexico
23000 US-50 NV
31000 CA-111 Mexico
34000 I-10/US-95 AZ
35000 I-8 AZ
35500 I-80 NV
46000 I-15 NV
56000 I-5 Mexico

These are all entry counts; the exit counts would have to be gotten from the other state's entry counts, but they're likely almost the same.

Route 167 is the desolate road that connects Mono Lake to NV-359 to Hawthorne. Don't break down on that road.

I'm not surprised I-5's Mexico crossing is the winner. Also, I-15 is high because it includes weekend Vegas traffic. I-8, I-10, and I-80 are lower but all in the same ballpark. CA-111 is another busy Mexico crossing.

The other major roads in and out have a lot less, I guess because there are quite a few alternatives.

*looks forward to mostly anecdotes and gut feelings*

 don't have the numbers handy but I'm thinking that the top three for Wisconsin are

1 - I-41/94 to Illinois (near Kenosha)
2 - I-94 to Minnesota (Saint Croix River at Hudson)
3 - I-39/90 to Illinois (at Beloit)

Mike

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

And yet, New York is... actually pretty cut and dry?

NJ 1st
PA 2nd
CT 3rd
MA 4th
VT 5th

You could maybe swap the last two, since I-90 is carrying a lot of weight there, but I don't see much scope for gut feels in the top three.

Quote from: pderocco on December 22, 2024, 03:39:01 AMYou can often find AADT data from state highway departments. If you're looking for the highest numbers, they're likely to be state highways. For California, here are the data from 2022, the latest I could find:

  100 CA-167 NV
  110 CA-299 NV
  140 CA-266 NV north
  300 CA-266 NV south
  380 CA-182 NV
  790 CA-127 NV
  820 US-395 OR
  950 CA-178 NV
 1270 US-6 NV
 2450 CA-905 Mexico
 2650 US-95 NV
 3250 CA-139 OR
 3400 CA-186 Mexico
 3700 US-97 OR
 4200 US-395 NV Topaz Lake
 4450 CA-88 NV
 4700 US-199 OR
 7800 CA-188 Mexico
 8000 CA-62 AZ
 8930 US-101 OR
10400 CA-28 NV
12600 US-395 NV Truckee River
17000 I-40 AZ
17300 I-5 OR
17600 CA-7 Mexico
23000 US-50 NV
31000 CA-111 Mexico
34000 I-10/US-95 AZ
35000 I-8 AZ
35500 I-80 NV
46000 I-15 NV
56000 I-5 Mexico

These are all entry counts; the exit counts would have to be gotten from the other state's entry counts, but they're likely almost the same.

Route 167 is the desolate road that connects Mono Lake to NV-359 to Hawthorne. Don't break down on that road.

I'm not surprised I-5's Mexico crossing is the winner. Also, I-15 is high because it includes weekend Vegas traffic. I-8, I-10, and I-80 are lower but all in the same ballpark. CA-111 is another busy Mexico crossing.

The other major roads in and out have a lot less, I guess because there are quite a few alternatives.

I'd imagine Bodie Road has a lofty AADT of maybe 2-5 during the summer.  I'd speculate that I'd the least used state line crossing into California.

Highway	State	AADT
I-25	WY	26000
I-25	NM	12000
I-70	KS	10000
US550	NM	9800
I-70	UT	9000
I-76	NE	8400
US287	WY	4300
US491	NM	4200
US287/385	OK	3900
US85	WY	3400
US491	UT	2800
US40	UT	2200
CO140	NM	2000
US160	NM	1800
US50/400	KS	1800
US385	NE	1600
CO113	NE	1500
US84	NM	1400
US285	NM	1300
US34	NE	1200
CO13	WY	1200
CO71	NE	1000
CO41	UT	990
CO127	WY	950
CO159	NM	890
US6	NE	830
US40	KS	780
US138	NE	630
CO125	WY	560
CO11	NE	550
CO96	KS	520
CO23	NE	460
CO17	NM	450
US36	KS	420
CO172	NM	400
US160	KS	330
CO90	UT	260
CO116	KS	200
CO389	NM	130
CO318	UT	110

WY: 36,410
NM: 34,370
NE: 16,170
UT: 15,360
KS: 14,050
OK: 3,900

Quote from: webny99 on December 22, 2024, 10:56:02 AM

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

And yet, New York is... actually pretty cut and dry?

NJ 1st
PA 2nd
CT 3rd
MA 4th
VT 5th

You could maybe swap the last two, since I-90 is carrying a lot of weight there, but I don't see much scope for gut feels in the top three.

If this isn't a case in point, I don't know what is.

Also, no numbers handy, but my sense for the busiest NYS state line crossing points are I-95 - NJ and I-95 - CT.

Mike

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

If you don't have anything meaningful to add to the discussion you don't have to post anything.

Quote from: mgk920 on December 22, 2024, 11:49:45 AMAlso, no numbers handy, but my sense for the busiest NYS state line crossing points are I-95 - NJ and I-95 - CT.

Mike

The Verrazzano Bridge and Lincoln and Holland Tunnels round out the top five. That's 4 NY/NJ and 1 NY/CT.

Even so, PA easily outweighs CT in terms of total crossings.

Quote from: webny99 on December 22, 2024, 12:51:37 PM

Quote from: mgk920 on December 22, 2024, 11:49:45 AMAlso, no numbers handy, but my sense for the busiest NYS state line crossing points are I-95 - NJ and I-95 - CT.

Mike

The Verrazzano Bridge and Lincoln and Holland Tunnels round out the top five.

PA still handily exceeds CT though because of sheer distance.

I think it's closer than you think. Sure it's long but the area near the border is not very dense at all, while the CT border is super dense and heavily traveled.

From Michigan:

1. Ohio
2. Indiana
3. Ontario
4. Wisconsin
5. Minnesota (via Isle Royale ferries)
6. Illinois (incidentally by water)

The busiest roads are most likely I-75 to Ohio and I-94 to Indiana.

Quote from: Roadgeekteen on December 22, 2024, 12:52:44 PM

Quote from: webny99 on December 22, 2024, 12:51:37 PM...

PA still handily exceeds CT though because of sheer distance.

I think it's closer than you think. Sure it's long but the area near the border is not very dense at all, while the CT border is super dense and heavily traveled.

I'll work on compiling some numbers later when I have a good chance.

I-84 adds a decent amount for NY/PA, missing NJ by less than 50 feet. And remember too that all I-86 traffic crosses twice near Sayre.

Then again, if we're getting technical, I suppose I-684 crosses twice too, but there's no exit so I'm not sure it should count.

Quote from: webny99 on December 22, 2024, 01:10:03 PM

Quote from: Roadgeekteen on December 22, 2024, 12:52:44 PM

Quote from: webny99 on December 22, 2024, 12:51:37 PM...

PA still handily exceeds CT though because of sheer distance.

I think it's closer than you think. Sure it's long but the area near the border is not very dense at all, while the CT border is super dense and heavily traveled.

I'll work on compiling some numbers later when I have a good chance.

I-84 adds a decent amount for NY/PA, missing NJ by less than 50 feet. And remember too that all I-86 traffic crosses twice near Sayre.

Then again, if we're getting technical, I suppose I-684 crosses twice too, but there's no exit so I'm not sure it should count.

It does, many long distance traffic, but just the shear number of commuter traffic to Connecticut is so high. And most NYC to PA traffic goes through New Jersey first.

For Washington:

1. Oregon. The flow of traffic between Vancouver and Portland is massive due to everyday commuting as well as shopping, commerce, and leisure travel.

2. Idaho. Spokane-Coeur d'Alene and Pullman-Moscow (WSU-UoI) both are paired clusters with plenty of crossover commuting.

3. British Columbia. While there are very few cross-border commuters, there's still plenty of shopping and commerce that happens over it. Canadians routinely travel stateside for cheaper gas and groceries, to pick up parcels at a forwarding or mailbox service (many are 24-hours, even in small towns like Sumas), or go shop at an outlet mall. Roughly 32,000 crossings a day between BC and WA.

Went through Utah's state AADT data, pulled the data from the segment of each route closest to the border, and came up with this. Utah has data from not only state highways, but also from the federal-aid highway network, which are local roads but have 4-digit numbers that are unique within the state and occasionally will have some small CR-type pentagon signs in rural areas.

Route   State   AADT
15      AZ   30951
80      WY   17747
15      ID   12879
84      ID   11904
91      ID   9523
80      NV   8962
70      CO   8738
59      AZ   7000
89A      AZ   5308
89      AZ   4965
40      CO   3766
89      ID   3578
491      CO   3558
58      NV   3035
163      AZ   2798
162      CO   2205
191      AZ   2047
43      WY   1991
16      WY   1681
200      ID   1598
23      ID   1463
191      WY   1438
43      WY   1402
3140   AZ   1183
30      WY   987
2414   CO   887
2410   AZ   820
2022   ID   797
3225   AZ   661
56      NV   653
1064   ID   616
30      NV   475
46      CO   469
150      WY   458
6      NV   457
42      ID   287
2422   CO   284
3214   NV   263
2610   WY   225
21      NV   185
1851   AZ   125
1364   WY   122
1130   ID   98
1364   CO   84

Adding the individual states up:

AZ   55858
ID   42743
WY   26051
CO   19991
NV   14030

I actually am surprised Arizona is so high - I figured it would be second place behind Idaho. I-15 to Arizona is far and away the busiest state line crossing in Utah, which is less surprising, but SR 59 and the US 89 and 89A crossings are all busy enough to add up as well.

I would have guessed Nevada at the bottom, but would not have been too surprised if Colorado had been closer to the bottom than it is.

Quote from: Rothman on December 22, 2024, 11:26:49 AM

Quote from: webny99 on December 22, 2024, 10:56:02 AM

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

And yet, New York is... actually pretty cut and dry?

NJ 1st
PA 2nd
CT 3rd
MA 4th
VT 5th

You could maybe swap the last two, since I-90 is carrying a lot of weight there, but I don't see much scope for gut feels in the top three.

If this isn't a case in point, I don't know what is.

Indeed.  Behold... THE DATA!  Because NY's border crossings are many and not all have counts, I only included the ones that have a route mapped in Travel Mapping on at least one side, except for a few that I included because state routes get very close (namely former US 15 and the NY 427 bounce) and the US/Canada border (those are fairly important).

New Jersey - 888,151
The fact that NJ is #1 does not surprise me.  The fact that it manages to surpass PA even when the Port Authority crossings are excluded did, however.
NJ 23 5,359
NY 284/NJ 284* 1,478
NY 94/NJ 94 6,977
NY 210 3,095
I-287/NY 17/NJ 17 69,951
US 202 8,447
NY 45 9,826
Garden State Parkway 60,893
NY 304 10,868
NY 303 12,586
NY 340 3,825
Palisades Interstate Parkway 44,957
US 9W 9,613
I-95/US 1/US 9/US 46 258,440
NY 495/NJ 495 108,112
I-78 84,948
NY 440/NJ 440 (Bayonne) 31,397
I-278 71,662
NY 440/NJ 440 (Outerbridge) 85,717

Connecticut - 542,259 (including I-684 and NY 120A dips); 359,654 (excluding I-684 and NY 120A)
The NY/CT border may not be the biggest, but it's still on the Northeast Corridor and southwest CT is still NYC exurbs.
NY 25 3,073
I-95* 128,300
US 1 30,990
Hutchinson River Parkway/CT 15 56,159
NY 120A (south) 13,227
NY 120A (middle south) 11,688
NY 120A (middle north) 11,688
NY 120A (north) 3,900
I-684 (south) 71,051
I-684 (north) 71,051
NY 433 5,558
CT 184 6,743
NY 137/CT 137 3,674
CT 124 4,315
NY 123/CT 123 7,410
NY 35/CT 35 7,038
NY 116/CT 116 3,637
I-84 73,370
US 6/US 202 11,795
NY 55/CT 55 4,156
CT 341 956
CT 41* 1,200
NY 343/CT 343 5,391
CT 361 1,647
US 44 4,242

Pennsylvania - 232,257 (including I-86 dip into PA); 198,351 (excluding I-86 traffic)
The PA border may be NY's longest land border by far, but the length does not make up for the sheer traffic of the NYC area.
NY 5/PA 5 1,251
I-90 16,295
US 20 2,629
NY 426/PA 426 (north) 570
I-86 9,585
NY 430/PA 430 956
NY 474/PA 474 752
NY 426/PA 426 (south) 762
PA 958 463
PA 69 1,920
US 62 4,255
NY 280/PA 346 557
US 219 9,763
NY 16/PA 646 1,553
PA 546 475
NY 305/PA 446 3,025
PA 44* 2,700
NY 19/PA 449 2,040
NY 248A/PA 244 701
NY 36/PA 249 771
I-99/US 15 13,161
PA 287** 2,132
NY 328/PA 328 4,830
NY 14/PA 14 2,911
NY 367 3,055
NY 427** 783
I-86 (west of exit 60) 24,929
US 220 (local) 5,820
US 220 (PA side)* 13,822
I-86 (east of exit 60) 16,979
NY 34/PA 199* 11,126
NY 282/PA 187 2,630
PA 858 2,616
NY 26/PA 267 4,456
PA 167* 481
NY 7/PA 29 2,225
NY 7A 1,639
US 11 2,879
I-81 20,655
NY 79/PA 92 560
PA 191 2,953
PA 371 1,449
NY 52/PA 652 2,958
NY 55/PA 434* 2,176
US 6/US 209 9,331
I-84 28,500

Vermont - 47,806 (including NY 373); 46,494 (excluding the "temporarily closed" ferry crossing at NY 373)
The VT crossings may be relatively quiet, but in this case the length of the border is important.
NY 346/VT 346 1,330
NY 7/VT 9 3,037
VT 279 8,324
NY 67/VT 67 3,436
NY 313/VT 313 1,765
VT 153 656
NY 149/VT 149 4,346
VT 31 726
NY 22A/VT 22A 2,798
US 4 7,972
NY 74/VT 74 503
NY 185/VT 17 3,618
VT F5* 1,200
NY 373 1,312
VT 314** 2,637
US 2 4,146

Ontario - 46,137
The NY/ON border may be all water, but most of the bridges are busy, particularly around the Niagara Falls area.
Seaway International Bridge 5,272
NY 812 2,060
I-81/ON 137 5,429
Wolfe Island-Cape Vincent Ferry 315
I-190/ON 405* 10,100
Whirlpool Bridge 1,397
NY 384 6,764
Queen Elizabeth Way* 14,800

Massachusetts - 39,486
One may think the NY/MA border would rank higher, but the I-90 traffic (far outstripping any individual crossing on the NY/VT border) does not make up for the short length.
NY 344 84
NY 23/MA 23 3,356
NY 71/MA 71 1,766
I-90 21,790
MA 102 1,745
NY 295/MA 295 2,726
US 20 5,132
NY 43/MA 43 1,781
NY 2/MA 2 1,106

Québec - 9,333
This being the least-traveled land border does not surprise me, but the sheer lack of volume is nonetheless impressive.  I guess most people don't feel like traversing the Adirondacks and northern flatland just to speak French.  At least it's not last!
US 11/QC 223 461
QC 221* 590
I-87/A-15* 6,300
QC 219 396
QC 203 94
NY 189/QC 209 255
CR 52 386
NY 30/QC 138 351
QC 132 500

Rhode Island - 0
With the only crossing on this border being the Block Island Ferry, there wasn't much of anything to measure here.

*Either NYSDOT didn't have data or there were reasons to not use it, so I used PennDOT, NJDOT, CTDOT, VTrans, MTQ, or MTO data.
**Route doesn't actually cross but comes close.

That's probably what I would have expected, I knew CT was over PA. I would have guessed Ontario over Vermont due to the popularity of Niagara Falls, but not super surprised.

Quote from: vdeane on December 22, 2024, 04:09:06 PM

Quote from: Rothman on December 22, 2024, 11:26:49 AM

Quote from: webny99 on December 22, 2024, 10:56:02 AM

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

And yet, New York is... actually pretty cut and dry?

...

If this isn't a case in point, I don't know what is.

Indeed.  Behold... THE DATA!

I am thoroughly confused as to how this is somehow being weaponized as a representation of anecdotes and gut feels. If anything, the data and everything else posted so far shows that NY DOES have clear tiers (despite my whiff on CT vs. PA), but I hope another thread devolving into pettiness makes everyone else feel better.

Quote from: webny99 on December 22, 2024, 06:51:48 PM

Quote from: vdeane on December 22, 2024, 04:09:06 PM

Quote from: Rothman on December 22, 2024, 11:26:49 AM

Quote from: webny99 on December 22, 2024, 10:56:02 AM

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

And yet, New York is... actually pretty cut and dry?

...

If this isn't a case in point, I don't know what is.

Indeed.  Behold... THE DATA!

I am thoroughly confused as to how this is somehow being weaponized as a representation of anecdotes and gut feels. If anything, the data and everything else posted so far shows that NY DOES have clear tiers (despite my whiff on CT vs. PA), but I hope another thread devolving into pettiness makes everyone else feel better.

Eh it's just Rothman being Rothman. Let him be.

Quote from: webny99 on December 22, 2024, 06:51:48 PM

Quote from: vdeane on December 22, 2024, 04:09:06 PM

Quote from: Rothman on December 22, 2024, 11:26:49 AM

Quote from: webny99 on December 22, 2024, 10:56:02 AM

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

And yet, New York is... actually pretty cut and dry?

...

If this isn't a case in point, I don't know what is.

Indeed.  Behold... THE DATA!

I am thoroughly confused as to how this is somehow being weaponized as a representation of anecdotes and gut feels. If anything, the data and everything else posted so far shows that NY DOES have clear tiers (despite my whiff on CT vs. PA), but I hope another thread devolving into pettiness makes everyone else feel better.

Quote from: webny99 on December 22, 2024, 06:51:48 PM

Quote from: vdeane on December 22, 2024, 04:09:06 PM

Quote from: Rothman on December 22, 2024, 11:26:49 AM

Quote from: webny99 on December 22, 2024, 10:56:02 AM

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

And yet, New York is... actually pretty cut and dry?

...

If this isn't a case in point, I don't know what is.

Indeed.  Behold... THE DATA!

I am thoroughly confused as to how this is somehow being weaponized as a representation of anecdotes and gut feels. If anything, the data and everything else posted so far shows that NY DOES have clear tiers (despite my whiff on CT vs. PA), but I hope another thread devolving into pettiness makes everyone else feel better.

Your whiff was exactly why I said what I said...which gave what I said quite a meaning.

Glad those have popped up with the AADT numbers.  The rest of the thread fits the description I provided.

Quote from: webny99 on December 22, 2024, 06:51:48 PM

Quote from: vdeane on December 22, 2024, 04:09:06 PM

Quote from: Rothman on December 22, 2024, 11:26:49 AM

Quote from: webny99 on December 22, 2024, 10:56:02 AM

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

And yet, New York is... actually pretty cut and dry?

...

If this isn't a case in point, I don't know what is.

Indeed.  Behold... THE DATA!

I am thoroughly confused as to how this is somehow being weaponized as a representation of anecdotes and gut feels. If anything, the data and everything else posted so far shows that NY DOES have clear tiers (despite my whiff on CT vs. PA), but I hope another thread devolving into pettiness makes everyone else feel better.

You were 1/5 on the ranking.

I actually looked at some ARDOT county maps out of curiosity, the I-55 and I-40 river bridges are pretty handedly the busiest state border crossings in Arkansas, with I-30 at Texarkana shortly behind. I-55 and I-49 have a similar AADT crossing the state line into Missouri, and I-40 of course is the highest for crossing in and out of Oklahoma. The lowest number I could find is probably AR 251 crossing into Missouri (Randolph County) which had an AADT of about 200.

Quote from: vdeane on December 22, 2024, 08:45:18 PM

Quote from: webny99 on December 22, 2024, 06:51:48 PM

Quote from: vdeane on December 22, 2024, 04:09:06 PM

Quote from: Rothman on December 22, 2024, 11:26:49 AM

Quote from: webny99 on December 22, 2024, 10:56:02 AM

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

And yet, New York is... actually pretty cut and dry?

...

If this isn't a case in point, I don't know what is.

Indeed.  Behold... THE DATA!

I am thoroughly confused as to how this is somehow being weaponized as a representation of anecdotes and gut feels. If anything, the data and everything else posted so far shows that NY DOES have clear tiers (despite my whiff on CT vs. PA), but I hope another thread devolving into pettiness makes everyone else feel better.

You were 1/5 on the ranking.

3 Upstate New Yorkers walk into a bar...

Quote from: Roadgeekteen on December 22, 2024, 09:13:18 PM

Quote from: vdeane on December 22, 2024, 08:45:18 PM

Quote from: webny99 on December 22, 2024, 06:51:48 PM

Quote from: vdeane on December 22, 2024, 04:09:06 PM

Quote from: Rothman on December 22, 2024, 11:26:49 AM

Quote from: webny99 on December 22, 2024, 10:56:02 AM

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

And yet, New York is... actually pretty cut and dry?

...

If this isn't a case in point, I don't know what is.

Indeed.  Behold... THE DATA!

I am thoroughly confused as to how this is somehow being weaponized as a representation of anecdotes and gut feels. If anything, the data and everything else posted so far shows that NY DOES have clear tiers (despite my whiff on CT vs. PA), but I hope another thread devolving into pettiness makes everyone else feel better.

You were 1/5 on the ranking.

3 Upstate New Yorkers walk into a bar...

...and it was awesome.

Quote from: vdeane on December 22, 2024, 08:45:18 PM

Quote

QuoteIndeed.  Behold... THE DATA!

I am thoroughly confused as to how this is somehow being weaponized as a representation of anecdotes and gut feels. If anything, the data and everything else posted so far shows that NY DOES have clear tiers (despite my whiff on CT vs. PA), but I hope another thread devolving into pettiness makes everyone else feel better.

You were 1/5 on the ranking.

3 of 3 on the tiers, while correctly stating that 4 and 5 are interchangeable (which they absolutely are after accounting for the inexact science of AADT counts and the numerous local crossings that don't have counts.)

Quote from: Rothman on December 22, 2024, 09:53:24 PM

Quote3 Upstate New Yorkers walk into a bar...

...and it was awesome.

Good, I'm glad you thought so.

At first glance, I thought this may have been a thread about which state border crossing you individually have crossed most often.

For me, it's definitely I-64 into West Virginia. After that? Probably US 23 into Virginia.

KYTC has traffic count maps online, but I'm not going to go poking around to see which Louisville or Cincinnati Ohio River crossing gets the most traffic, although I'd imagine 2024 counts will be skewed by the closure of the southbound I-471 bridge.

I was struggling a bit on this question for Illinois, because freight traffic and tourist traffic are separate considerations. It brought up the interesting question of how answers to this proposition might differ based on freight volume versus passenger volume, or tourist volume.  The IL/WI border would dominate for tourist traffic.

I would guess:
1. Indiana.  Between the I-80/94, I-90, and I-70 border crossings, that border is bound to have a ton of traffic coming to/from the east.  Everything coming out of Illinois bound for the east coast, or for Michigan, has to go through Indiana first, with the very minor exception of those using I-24 through Kentucky.
2. Wisconsin. Tons of tourist traffic going north, plus everything going west by way of I-90 and I-94. Chicago has by far the strongest pull in terms of trip generation. So statistically, if almost all Illinois trips are starting or ending in Chicagoland, almost all out-of-state trips will involve either Indiana or Wisconsin.
3 and 4 are tricky. 3 will probably be Missouri just because of the volume of trips in the Metro-East that will involve a crossing of the Mississippi River. But I-80's crossing into and out of Iowa is a very highly-traveled freight connection. Look at all that freight going east-west through the Quad Cities and Burlington! I'll put Iowa at number 4 for now, but I will happily stand corrected if it comes to that.
(https://www.bts.gov/sites/bts.dot.gov/files/2021-03/Freight%20Flows%20by%20Highway%2C%20Railway%2C%20and%20Waterway%202018.png)

Kentucky obviously brings up the rear at #5.

And if Mr. Roth has the time to perform some consummate painstaking empirical research on this, he can do it himself.

Wisconsin, by state:
1. IL
2. MN
3. MI
4. IA

Minnesota, by state/province:
1. WI
2. ND
3. IA
4. SD
5. ON
6. MB
7. MI by water

WISDOT's traffic counts map makes it easy to find AADT at WI border crossings
1. I-94 at IL - 97,000
2. I-94 at MN - 82,000
3. I-39/90 at IL - 63,000
4. I-535/US-53 at MN - 29,000
5. I-90 at MN - 28,000
6. WI-64 at MN - 28,000
7. US-61/151 at IA - 23,000
8. US-41 at MI - 18,000
9. US-10 at MN - 17,000
10. WI-31 at IL - 17,000
11. US-14/61 at MN - 16,000
12. US-12 at IL - 15,000
13. US-2 at MN - 15,000
14. US-8 at MN - 13,000
15. US-51 at IL - 12,000
16. WI-32 at IL - 11,000

Quote from: webny99 on December 22, 2024, 10:17:00 PM

Quote from: vdeane on December 22, 2024, 08:45:18 PM

Quote

QuoteIndeed.  Behold... THE DATA!

I am thoroughly confused as to how this is somehow being weaponized as a representation of anecdotes and gut feels. If anything, the data and everything else posted so far shows that NY DOES have clear tiers (despite my whiff on CT vs. PA), but I hope another thread devolving into pettiness makes everyone else feel better.

You were 1/5 on the ranking.

3 of 3 on the tiers, while correctly stating that 4 and 5 are interchangeable (which they absolutely are after accounting for the inexact science of AADT counts and the numerous local crossings that don't have counts.)

Quote from: Rothman on December 22, 2024, 09:53:24 PM

Quote3 Upstate New Yorkers walk into a bar...

...and it was awesome.

Good, I'm glad you thought so.

The gap between CT and PA is larger than the gap between PA and VT no matter how you slice it.  That said, I didn't bring in the data to snark at you.  I started working on putting that all together around 11 AM; it just took a couple hours to do and then I posted it once I finally got around to my main forum check for the day.

As for the small crossings, they would largely mirror how things are and I don't expect that they would change any rankings.  PA has a ton, but they're pretty much all rural.  Meanwhile many of CT's are exurban and many of NJ's are solidly suburban.

Quote from: vdeane on December 23, 2024, 03:03:25 PMThe gap between CT and PA is larger than the gap between PA and VT no matter how you slice it.

Unless you count I-86 but not I-684. That may seem inconsistent at first glance, but they are majorly differentiated by the fact that I-86 has an exit (plus another pair of ramps) that's in PA. That means traffic has an opportunity to enter PA via I-86, take Exit 60, and not return to NY at all. That's a significant chunk of true cross-state traffic that's actually crossing the state line for good via I-86. Meanwhile, I-684 traffic does not have that same opportunity. It's entirely NY traffic that just happens to clip the corner of CT, and any of that traffic that's truly crossing the state line would already be accounted for at one of the other crossings.

In short: There's no way I-684 should count, but there's a strong case for I-86 to count because of Exit 60.

Quote from: vdeane on December 23, 2024, 03:03:25 PMThat said, I didn't bring in the data to snark at you.  I started working on putting that all together around 11 AM; it just took a couple hours to do and then I posted it once I finally got around to my main forum check for the day.

Understood, and I do appreciate you putting it all together. It was very interesting to see for sure, and I was starting to realize I was probably incorrect about CT even before seeing any of the data. There's just nothing between NY and PA to make up for the massive volumes of I-95 and the Merritt. Now, freight volumes could be another story (no more projections from me though).

Quote from: webny99 on December 23, 2024, 03:27:55 PMUnless you count I-86 but not I-684. That may seem inconsistent at first glance, but they are majorly differentiated by the fact that I-86 has an exit (plus another pair of ramps) that's in PA. That means traffic has an opportunity to enter PA via I-86, take Exit 60, and not return to NY at all. That's a significant chunk of true cross-state traffic that's actually crossing the state line for good via I-86. Meanwhile, I-684 traffic does not have that same opportunity. It's entirely NY traffic that just happens to clip the corner of CT, and any of that traffic that's truly crossing the state line would already be accounted for at one of the other crossings.

In short: There's no way I-684 should count, but there's a strong case for I-86 to count because of Exit 60.

Yeah, that's why I have two numbers for US 220.  When I was including the two I-86 counts and the count of former US 220 to former NY 17, I'd throw out the count of US 220 south of exit 60, and vice-versa.

CT without I-684 but including NY 120A is 400,157 (glad I still have the Excel file I used for this).  If we exclude that NY 25 count as well (not sure how much of that is going to the ferry), it's 397,084.  So doing it that way would edge PA closer to CT than VT... but only by ~20,000.

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

Would you ever expect anything else from the wonderful internet?

Without even looking at any numbers, NC is pretty straightforward:

• South Carolina
• Virginia
• Tennessee
• Georgia

Quote from: Max Rockatansky on December 22, 2024, 11:07:56 AMI'd imagine Bodie Road has a lofty AADT of maybe 2-5 during the summer.  I'd speculate that I'd the least used state line crossing into California.

For the past couple years, the least used state line crossing would be Scotty's Castle Rd in Death Valley to NV-267, with a great big round 0.

That's why my California clinches are stuck at 99.97%.

Quote from: thspfc on December 23, 2024, 04:42:04 PM

Quote from: Rothman on December 22, 2024, 10:12:08 AM*looks forward to mostly anecdotes and gut feelings*

Would you ever expect anything else from the wonderful internet?

Yes.

Quote from: paulthemapguy on December 23, 2024, 12:42:40 PMI was struggling a bit on this question for Illinois, because freight traffic and tourist traffic are separate considerations. It brought up the interesting question of how answers to this proposition might differ based on freight volume versus passenger volume, or tourist volume.  The IL/WI border would dominate for tourist traffic.

I would guess:
1. Indiana.  Between the I-80/94, I-90, and I-70 border crossings, that border is bound to have a ton of traffic coming to/from the east.  Everything coming out of Illinois bound for the east coast, or for Michigan, has to go through Indiana first, with the very minor exception of those using I-24 through Kentucky.
2. Wisconsin. Tons of tourist traffic going north, plus everything going west by way of I-90 and I-94. Chicago has by far the strongest pull in terms of trip generation. So statistically, if almost all Illinois trips are starting or ending in Chicagoland, almost all out-of-state trips will involve either Indiana or Wisconsin.
3 and 4 are tricky. 3 will probably be Missouri just because of the volume of trips in the Metro-East that will involve a crossing of the Mississippi River. But I-80's crossing into and out of Iowa is a very highly-traveled freight connection. Look at all that freight going east-west through the Quad Cities and Burlington! I'll put Iowa at number 4 for now, but I will happily stand corrected if it comes to that.

[snippage]

Kentucky obviously brings up the rear at #5.

And if Mr. Roth has the time to perform some consummate painstaking empirical research on this, he can do it himself.

For Illinois, #1 would be I-80/94 to Indiana, #2 would be I-41/94 to Wisconsin and #3 would be I-39/90 to Wisconsin, right?  Would I-55 to Missouri be #4?

Mike

Quote from: paulthemapguy on December 23, 2024, 12:42:40 PMKentucky obviously brings up the rear at #5.

Followed by Michigan at #6 (water border only, but I imagine some boats cross it)

Alabama, going by my anecdotal estimates:

1. Georgia; especially routes leading to Atlanta metro area.

2. Mississippi; basing this by freight numbers and overall border length.

3. Tennessee; will increase during holiday travel, based on out-of-state plates. Would overtake to #2 during Spring Break and Memorial Day weekend.

4. Florida; save I-10, all other routes go through lesser-populated regions of its state. You definitely wouldn't think you're headed into the third most-populous US state if traveling from Alabama.

Texas I would guess: LA, Mexico, OK, AK, NM though not sure where Mexico would actually fall.

MN is ND really above IA??

For MN I can't imagine it's anything other than I-94 at the St. Croix and its 73,000.

Quote from: TheHighwayMan3561 on December 24, 2024, 03:31:56 PMFor MN I can't imagine it's anything other than I-94 at the St. Croix and its 73,000.

I-94 at the ND border is only a few thousand behind at 71k according to MNDOT - though MNDOT's map does not have a count for I-94 east of MN-95. WISDOT's count was 82k at the bridge.

It's interesting that the top two crossings for both WI and MN are I-94.

Quote from: mgk920 on December 24, 2024, 12:56:01 PMFor Illinois, #1 would be I-80/94 to Indiana, #2 would be I-41/94 to Wisconsin and #3 would be I-39/90 to Wisconsin, right?  Would I-55 to Missouri be #4?

Mike

https://www.gettingaroundillinois.com/Traffic%20Counts/index.html
1. I-80/94 IN
2. I-55/64 MO
3. I-94 WI
4. I-74 IA

Over 200k on the Borman is mind blowing. I would be interested to see the top 10 busiest crossings in the US. Also unique that IL's top 4 are 4 different other states.

Quote from: texaskdog on December 24, 2024, 03:05:57 PMTexas I would guess: LA, Mexico, OK, AK, NM though not sure where Mexico would actually fall.

MN is ND really above IA??

Mexico has separate states just like Canada has provinces.

Quote from: thspfc on December 24, 2024, 04:54:33 PMOver 200k on the Borman is mind blowing. I would be interested to see the top 10 busiest crossings in the US. Also unique that IL's top 4 are 4 different other states.

The GWB, which has 258,440 per vdeane's data shared upthread, is very likely #1.

I-95 NY/CT (128,300) and the Lincoln Tunnel (108,112) are both likely in the top 10 also.

For the great Commonwealth of Pennsylvania...my initial guesses were that New Jersey would be #1 (obviously), and that West Virginia would be #6, but I wasn't really sure how the middle four would stack up. Maryland seemed like a good pick for #2, but was there enough traffic for Delaware to beat out New York and Ohio?

My findings, based on the 2022 Statewide AADT Map, using the closest data point for border crossing routes:

1. New Jersey    664,300
2. Maryland       253,600
3. Delaware       190,900
4. New York       156,300
5. Ohio              143,450
6. West Virginia 119,400

The busiest individual border crossings are:

1. I-76 Walt Whitman Bridge 108,000
2. I-676 Ben Franklin Bridge 98,000
3. I-95 DE line 96,000
4. I-78 NJ line 64,000

Quote from: thspfc on December 24, 2024, 04:54:33 PM

Quote from: TheHighwayMan3561 on December 24, 2024, 03:31:56 PMFor MN I can't imagine it's anything other than I-94 at the St. Croix and its 73,000.

I-94 at the ND border is only a few thousand behind at 71k according to MNDOT - though MNDOT's map does not have a count for I-94 east of MN-95. WISDOT's count was 82k at the bridge.

It's interesting that the top two crossings for both WI and MN are I-94.

Quote from: mgk920 on December 24, 2024, 12:56:01 PMFor Illinois, #1 would be I-80/94 to Indiana, #2 would be I-41/94 to Wisconsin and #3 would be I-39/90 to Wisconsin, right?  Would I-55 to Missouri be #4?

Mike

https://www.gettingaroundillinois.com/Traffic%20Counts/index.html
1. I-80/94 IN
2. I-55/64 MO
3. I-94 WI
4. I-74 IA

Over 200k on the Borman is mind blowing. I would be interested to see the top 10 busiest crossings in the US. Also unique that IL's top 4 are 4 different other states.

The Borman is also one of the busiest commercial truck routes in the world.

Mike

Quote from: thspfc on December 24, 2024, 04:54:33 PM

Quote from: TheHighwayMan3561 on December 24, 2024, 03:31:56 PMFor MN I can't imagine it's anything other than I-94 at the St. Croix and its 73,000.

I-94 at the ND border is only a few thousand behind at 71k according to MNDOT - though MNDOT's map does not have a count for I-94 east of MN-95. WISDOT's count was 82k at the bridge.

I-94 at the MN/ND state line in the major crossing between two cities in a metro area.  It makes sense to me.

Mike

Quote from: mgk920 on December 25, 2024, 12:00:59 PM

Quote from: thspfc on December 24, 2024, 04:54:33 PM

Quote from: TheHighwayMan3561 on December 24, 2024, 03:31:56 PMFor MN I can't imagine it's anything other than I-94 at the St. Croix and its 73,000.

I-94 at the ND border is only a few thousand behind at 71k according to MNDOT - though MNDOT's map does not have a count for I-94 east of MN-95. WISDOT's count was 82k at the bridge.

I-94 at the MN/ND state line in the major crossing between two cities in a metro area.  It makes sense to me.

Mike

I-94 at the MN/WI line is a major crossing between a much bigger metro and some of its suburbs and exurbs, as well as being a primary route from said metro to the rest of the country. An ~11k gap between MN/ND and MN/WI (in favor of the latter) makes sense to me.

I got curious about Québec and thought I'd do another analysis on par with NY, only to run into the issue where good traffic data isn't available for two of its borders.  However, estimating a ranking isn't hard.  The top border is Ontario by far; I didn't even bother adding everything up as A-5 alone exceeds the all non-Ontario border crossings combined.  We already have the number for NY from when I did NY's borders, and surprisingly, that's second place!  Third and fourth are filled out by Vermont and New Brunswick; going by the numbers I could get, New Brunswick is third at 7,400 and Vermont is fourth at 6,550, however many of the VT border crossings have missing data.  It likely wouldn't put VT above NB, but you never know.  After this is where things get tricky; there is no good data for Newfoundland and Labrador at all, however adding up an old count for the ferry to NL 430 and a count on QC 389 south of Fermont, that border is somewhere around 2,700, meaning that it is likely at 5th (there is no data for QC 138/NL 510 at all).  That would place Maine at sixth with 980.  The number I was able to estimate for Prince Edward Island from a ferry report (https://www.tourismeilesdelamadeleine.com/en/media/what-s-new/2023/11/08/report-on-iles-de-la-madeleine-s-2023-summer-tourist-season/) is 297, which would make it seventh.  New Hampshire is eighth at 110, and Nunavut is, of course, ninth at 0.

Skimming the IowaDOT traffic map, it seems pretty clear-cut.

• Illinois
• Nebraska
• Missouri
• Minnesota
• South Dakota
• Wisconsin

I thought Nebraska would be a lot closer to Illinois, but the Quad Cities has a lot of travel across the river, I guess more so than the Omaha area.

I have a pretty good guess for Idaho, but I'll try to run the numbers. Only doing state highways, and I'm just manually doing scrolling through the AADT map so hopefully I don't miss anything important.

Washington
I-90: 64,000
US-12: 21,000
ID-8: 17,000
US-2: 11,500
ID-53: 10,500
I'm going to stop counting here, since WA is by far and away the highest here (I-90 alone is almost enough for first place), and there's a lot of smaller highways, no need for me to count them all.
Total: 124,000+

Oregon
I-84: 26,000
US-30: 24,500
US-20/26: 5,300
ID-52: 5,100
US-95: 2,400
US-95 Alt: 2,100
ID-19: 780
Total: 66,180

Utah
I-15: 13,000
I-84: 11,000
US-91: 8,800
US-89: 1,200
Total: 34,000

Montana
I-90: 9,300
US-20: 5,000
I-15: 3,500
US-2: 1,500
ID-87: 1,500
ID-200: 1,300
US-93: 670
US-12: 610
ID-29: 100
Total: 23,480

Wyoming
ID-33: 7,500
US-26: 3,100
US-81: 1,200
US-30: 1,200
ID-61: 900
ID-34: 710
Total: 14,610

Nevada
US-93: 4,300
ID-51: 1,700
Total: 6,000

British Columbia
US-95: 1,100
ID-1: 400
Total: 1,500


That was exactly the order I would have predicted. They're all sensible. WA has a lot of commute traffic between Spokane/CDA, Moscow/Pullman, and Lewiston/Clarkston. OR has some commute traffic around Ontario/Fruitland/Payette (see the high numbers for US-30, essentially a city street), plus thru traffic on I-84. Utah has a higher interstate draw towards SLC but not much commute traffic. Montana is more remote but still has 2 interstates. Wyoming has Teton Valley to Jackson traffic but not much else. And Nevada and BC are just very remote, non-Interstate highway crossings.

EDIT: I missed a few in Wyoming the first time around. I think I misinterpreted a county line on the AADT map as the ID/UT border...oops. Fixed it now, though it doesn't affect its ranking.

Michigan has a map based tool to view traffic numbers: https://mdot.public.ms2soft.com/tcds/tsearch.asp?loc=Mdot&mod=TCDS

* indicates 2023 data.

Crossing	State	County	Total	Inbound	Outbound
I-75*	OH	Monroe	57934	29321	28613
US-23	OH	Monroe	48066	23853	24211
I-94	IN	Berrien	32094	14431	17663
I-69	IN	Branch	23195	11697	11776
US-41	WI	Menominee	20740	10405	10335
Ambassador Br*	ON	Wayne	20628	N/A	N/A
US-31	IN	Berrien	20617	10164	10453
M-51*	IN	Berrien	14744	7404	7340
Windsor Tunnel*	ON	Wayne	11905	5991	5914
M-66*	IN	St Joseph	11451	5791	5659
I-69 / BWB	ON	St. Clair	10362	5473	2473
M-62*	IN	Cass	9994	5010	4984
US-24*	OH	Monroe	9591	5231	4360
US-131*	IN	St Joseph	9368	4613	4754
US-12	IN	Berrien	8788	4519	4269
US-141*	WI	Dickinson	6783	3515	3268
US-2*	WI	Dickinson	6251	3123	3129
BUS US-2	WI	Gogebic	5761	2941	2820
M-103	IN	St Joseph	4994	2491	2503
M-217	IN	Cass	4854	2404	2450
M-125*	OH	Monroe	4840	N/A	N/A
M-239*	IN	Berrien	4598	2284	2314
US-2 (2015)	WI	Gogebic	4545	N/A	N/A
ALT US-24*	OH	Monroe	3845	1950	1895
US-2*	WI	Iron	2913	1473	1440
M-52	OH	Lenawee	2876	1445	1456
I-75 / Int'l Br	ON	Chippewa	2865	1513	1352
US-45*	WI	Gogebic	2659	1341	1317
US-127*	OH	Hillsdale/Lenawee	2620	1294	1327
US-8*	WI	Dickinson	2230	1049	1182
M-99*	OH	Hillsdale	2147	1089	1059
M-156*	OH	Lenawee	1609	N/A	N/A
M-189*	WI	Iron	1500	754	746
M-49*	OH	Hillsdale	1299	661	635
M-73*	WI	Iron	468	241	228
M-64*	WI	Gogebic	290	141	149

Total by State/Province:

Indiana: 144,697
Ohio: 134,827
Wisconsin: 54,140
Ontario: 45,760

The maritime borders with Minnesota and Illinois do not have any direct ferry connections or the like.

This list does not include non-numbered roads.  For example, there are two non-numbered city street bridge crossings over the Menominee River between Menominee,MI and Marinette, WI.

Mike

Quote from: mgk920 on January 02, 2025, 11:06:31 AMThis list does not include non-numbered roads.  For example, there are two non-numbered city street bridge crossings over the Menominee River between Menominee,MI and Marinette, WI.

Mike

And this is why, for some states, this exercise doesn't make a lot of sense to perform. Kansas and Missouri quickly come to mind.

Quote from: mgk920 on January 02, 2025, 11:06:31 AMThis list does not include non-numbered roads.  For example, there are two non-numbered city street bridge crossings over the Menominee River between Menominee,MI and Marinette, WI.

Mike

Correct. I included only MDOT-maintained crossings for the purpose of this discussion, otherwise the list would have easily been twice as long.

For Oregon I would say:

1.Washington, because of its proximity to the Portland metro area.
2.California, lots of tourism going back and forth between the two states.
3.Idaho, really the only border crossing between Oregon and Idaho that gets a lot of traction is I-84.
4.Nevada, not many people going from Oregon to Nevada and vice versa.

Just did Wyoming, and it's closer than I thought. Note that I did include every single crossing, including those where no one is likely to (or can) exit the route before re-entering the state. I also used the numbers for the implied routes in Yellowstone.

Highway	State	AADT
I-25	CO	21955
I-80	UT	17817
WYO22	ID	10019
I-80	NE	8776
I-90	SD	6002
WYO89	UT	5926
US20	MT	5785
US287	CO	5566
US89	MT	4964
US30	NE	4044
US26	NE	3933
US85	CO	3265
US212	MT	3263
US26	ID	2663
US191	MT	2605
US191	MT	2605
US191	MT	2605
US212	SD	2333
WYO120	MT	2016
US16	SD	1881
US87	MT	1717
US310	MT	1619
US18	SD	1434
US212	MT	1270
WYO89	UT	1253
WYO789	CO	1193
US89	ID	1186
WYO239	ID	1156
WYO89	ID	1112
US30	ID	1103
WYO151	NE	1029
US212	MT	989
WYO530	UT	988
WYO230	CO	958
WYO34	SD	914
WYO338	MT	913
WYO414	UT	888
WYO150	UT	833
US191	UT	731
US212	MT	668
US85	SD	615
US20	NE	555
WYO59	MT	543
WYO92	NE	520
WYO345	MT	500
WYO230	CO	478
WYO112	MT	398
WYO37	MT	330
WYO216	NE	314
WYO430	CO	243
WYO10	CO	238
WYO158	NE	166
WYO70	CO	86
WYO70	CO	86

CO: 34,068
MT: 32,790
UT: 28,436
NE: 19,337
ID: 17,239
SD: 13,179

Quote from: webny99 on December 25, 2024, 02:02:14 PM

Quote from: mgk920 on December 25, 2024, 12:00:59 PM

Quote from: thspfc on December 24, 2024, 04:54:33 PM

Quote from: TheHighwayMan3561 on December 24, 2024, 03:31:56 PMFor MN I can't imagine it's anything other than I-94 at the St. Croix and its 73,000.

I-94 at the ND border is only a few thousand behind at 71k according to MNDOT - though MNDOT's map does not have a count for I-94 east of MN-95. WISDOT's count was 82k at the bridge.

I-94 at the MN/ND state line in the major crossing between two cities in a metro area.  It makes sense to me.

Mike

I-94 at the MN/WI line is a major crossing between a much bigger metro and some of its suburbs and exurbs, as well as being a primary route from said metro to the rest of the country. An ~11k gap between MN/ND and MN/WI (in favor of the latter) makes sense to me.

WisDOT may have a different methodology in computing their numbers, so for a proper apples-to-apples comparison, it would be useful to use MnDOT's numbers for both crossings.  It's also worth noting that the Red River crossing is a far more urban environment than the almost-exurban St. Croix River crossing, so the numbers being closer is not out of the question.

Quote from: froggie on January 03, 2025, 08:44:47 AMWisDOT may have a different methodology in computing their numbers, so for a proper apples-to-apples comparison, it would be useful to use MnDOT's numbers for both crossings.

Of course, but I inferred from the previous post that MnDOT didn't have a count for the bridge itself. In that case, WI's count for the actual bridge is almost certainly a more relevant comparison than MnDOT's counts from west of MN 95, unless MN 95 coincidentally happens to be a total wash. That seems unlikely for two reasons, one being WI's data, and the other being that major bridges are typically busier than the adjacent segments because of traffic funneling onto them from both sides to get across a choke point, and in this case also indicated by the presence of auxiliary lanes.

Quote from: webny99 on January 03, 2025, 08:57:50 AM

Quote from: froggie on January 03, 2025, 08:44:47 AMWisDOT may have a different methodology in computing their numbers, so for a proper apples-to-apples comparison, it would be useful to use MnDOT's numbers for both crossings.

Of course, but I inferred from the previous post that MnDOT didn't have a count for the bridge itself. In that case, WI's count for the actual bridge is almost certainly a more relevant comparison than MnDOT's counts from west of MN 95, unless MN 95 coincidentally happens to be a total wash. That seems unlikely for two reasons, one being WI's data, and the other being that major bridges are typically busier than the adjacent segments because of traffic funneling onto them from both sides to get across a choke point, and in this case also indicated by the presence of auxiliary lanes.

The MnDOT count in question is for I-94 east of Exit 258.  Take that for what you will...

West Virginia

It's taken several weeks to compile this list.  WVDOH could care less about the numbers of border crossings, and as a result, there are a bunch of crossings where the closest traffic data locations are not appropriate for counting border crossings.  In a few cases, AADT for multiple routes approaching the border crossing could be taken into account to get a decent estimate (in particular, US-35 into Ohio and US-22 into Ohio).

Surprisingly, West Virginia has a bunch of crossings that are bucking for the Top Ten.  The list changes significantly if you look at the data posted by the other states.  Data in (parentheses) are from the other state's AADT numbers.  There are a few others making the Top Ten list if you take the average between the two states.

INDIVIDUAL CROSSINGS (AADT reported by WVDOH)

1	Maryland	I-81	63,715	Potomac River crossing
2	Virginia	I-81	51,307
3	Ohio	I-470	39,018	Ohio River crossing
4	Pennsylvania	I-70	31,777
5	Virginia	I-77	28,653	East River Mountain Tunnel
6	Pennsylvania	I-79	27,747
7	Pennsylvania	US-22	23,026
8	Kentucky	I-64	22,857	Big Sandy River crossing
9	Ohio	WV-106	21,507	Ohio River crossing
10	Ohio	I-77	21,259	Ohio River crossing

INDIVIDUAL CROSSINGS (AADT reported by Other States)

1	Maryland	I-81	(65,750)	Potomac River crossing
2	Virginia	I-81	(53,000)
3	Ohio	I-470	(41,413)	Ohio River crossing
4	Virginia	I-77	(32,000)	East River Mountain Tunnel
5	Ohio	US-22	(31,131)	Ohio River crossing
6	Pennsylvania	I-70	(29,000)
7	Ohio	US-35	(26,980)	Ohio River crossing
8	Ohio	US-52	(24,564)	Ohio River crossing
9	Kentucky	I-64	(23,164)	Big Sandy River crossing
10	Virginia	US-340	(22,000)

When looking at the big picture, West Virginia has a lot of border crossings just because of its unique shape.  Adding to the mess is that West Virginia and its bordering states can't agree on whether roads get state route numbers.  For clarity, I've reduced the listing to all Interstate routes, U.S. Routes, and State Routes (either side of the border); plus any secondary route that carries more than 500 AADT.  For the river borders, I've included all such river border crossings unless both states didn't bother to collect the data (only three didn't make the cut).

I wasn't surprised by these numbers, but you might not have guessed Ohio given the Top Ten lists above:

CROSSINGS BY STATE (AADT totals for Qualified Crossings)

Ohio	303,217	(319,589)
Virginia	244,797	(268,528)
Maryland	158,677	(157,785)
Pennsylvania	125,497	(115,058)
Kentucky	84,852	(85,261)

I should mention that West Virginians get a bit testy when discussing what constitutes a "border".  West Virginia has one border with Kentucky; one border with Ohio; two borders with Pennsylvania; two borders with Maryland; but gazillions with Virginia. 

If you want to be technical, the Mason-Dixon doesn't quite reach the Panhandle and some folks on the other side think that the Levisa Fork is more important than the Tug River; add one extra for Pennsylvania and one extra for Kentucky.  (None of the qualified border crossings actually cross that short section beyond the Mason-Dixon Line, so there are still only two borders with Pennsylvania with respect to this data).

What about Maryland?  The so-called North Branch of the Potomac River had already been the subject of a border dispute even before the colonies of Maryland and Virginia got involved.  But even though Lord Fairfax put his mark on the "true headwaters" of the Potomac River, Maryland still fought to move the boundary to the South Branch.  This dispute wasn't settled until 1910.  For some West Virginians, we still remember.  Only one Potomac River; hence, only two boundaries with Maryland.


With all being said, the Eastern Panhandle border that separates those three counties from Frederick and Clarke counties in Virginia has a higher "border count" than all of Kentucky.

But there is also one "border" that held a bunch of surprises.  Coming in at Second Place on the list of Virginia borders is the so-called Pocahontas Line that separates the two Bluefields (as well as all of Western Mercer from Eastern Tazewell) includes a bunch of unnumbered streets and roads that have surprisingly high traffic counts.  (Hence a new rule to include these streets and road).

Third Place on the the list of Virginia borders is also on the Eastern Panhandle.  There are only two roads across the Blue Ridge that separates Jefferson and Loudoun counties that qualify as border crossings (US-340 and WV-9), and those two routes get huge numbers due to DC/NOVA commuter traffic.  (And yes, I am well aware that there is a third road (Ravens Rocks) that crosses back-and-forth between the two states, and have posted about it several times).


CROSSINGS BY BORDER (AADT totals for Qualified Crossings)

Ohio (Ohio River)	303,217	(319,589)
Maryland (Potomac River)	138,903	(136,310)
Virginia (Eastern Panhandle slice)	87,050	(86,740)
Kentucky (Tug River / Big Sandy River)	84,852	(85,261)
Pennsylvania (Northern Panhandle)	73,374	(66,450)
Pennsylvania (Mason-Dixon Line)	52,123	(48,608)
Virginia (Eastern Tazewell)	43,922	(49,139)
Virginia (Blue Ridge)	36,653	(42,000)

The tables for the rest of the data is wonky.  Will take a while to get it posted.
 

West Virginia (details)

OHIO

303,217

(319,589)

OHIO RIVER CROSSINGS

303,217

(319,589)

US-52	West Huntington [Toll] Bridge	19,845	(24,564)
WV-527 (OH-527)	Robert C. Byrd Bridge	12,738	(16,851)
WV-106 (OH-106)	Gatski Memorial Bridge (East Huntington)	21,507	(15,509)
US-35	Silver Memorial Bridge	17,216	(26,980)
(OH-833)	Pomeroy-Mason Bridge	9,103	(9,009)
US-33	Ravenswood Bridge	3,748	(2,561)
US-50	Blennerhassett Island Bridge	11,603	(11,171)
WV-618 (OH-32)	Parkersburg–Belpre Bridge	20,712	(14,713)
unsigned WV-140	Parkersburg Memorial Bridge	13,503	(6,284)
WV-31 (OH-60)	Williamstown Bridge	11,745	(10,756)
I-77	Marietta–Williamstown Interstate Bridge	21,259	(19,892)
WV-807 (OH-807)	Carpenter Memorial Bridge (St. Marys)	no data	(7,984)
	Sistersville Ferry	no data	(no data)
WV-7	Korean War Veterans Memorial Bridge (New Martinsville)	7,257	(8,651)
(OH-872)	Arch Moore 12th Street Bridge (Moundsville)	12,606	(12,773)
I-470	Vietnam Veterans Memorial Bridge	39,018	(41,413)
I-70	Fort Henry Bridge	16,725	(19,513)
US-40/US-250	Zane Street Purple Heart Bridge	14,175	(16,288)
(OH-702)	Wellsburg Bridge	no data	(no data)
	Market Street Bridge (Follansbee)	6,480	(6,470)
US-22	Veterans Memorial Bridge (Weirton)	20,234	(31,131)
US-22	Wayne Six Newell Toll Bridge	2,621	(4,681)
US-30	Jennings Randolph Bridge	13,138	(12,395)

PENNSYLVANIA

125,497

(115,058)

NORTHERN PANHANDLE CROSSINGS

73,374

(66,450)

US-30	Lincoln Highway	7,114	(6,800)
Old US-22	Steubenville Pike	3,632	(2,200)
US-22	Weirton Bypass	23,025	(20,000)
Alt WV-27	Eldersville Road	739	(1,000)
WV-27 (PA-844)	Washington Pike	3,037	(3,800)
WV-67 (PA-331)	Bethany Pike	no data	(150)
US-40	National Road	2,437	(1,400)
I-70		31,777	(29,000)
WV-891 (PA-21)	Rock Lick Road	31,777	(29,000)

MASON-DIXON LINE CROSSINGS

52,123

(48,608)

WV-69 (PA-18)	Pennsylvania Avenue	no data	(1,600)
	Toms Run Road (Macdale)	no data	(800)
WV-218(PA-218)	Jefferson Street (Daybrook Road)	no data	(1,600)
	Buckeye Road	no data	(1,400)
US-19	Mount Morris Road (Blue Horizon Drive)	no data	(1,800)
I-79	Jennings Randolph Expressway	no data	(21,000)
	Fort Martin Road	1,035	(1,100)
US-119	Point Marion Road	4,138	(5,200)
WV-43 (Toll PA-43)	Mon-Fayette Expressway	9,798	(9,500)
LSR-853 (PA-853)	Fairchance Road	1,147	(4,200)
(PA-381)	Clifton Mills Road	no data	(400)
WV-26 (PA-281)	North Preston Highway	658	(no data)

MARYLAND

158,677

(157,785)

FAIRFAX STONE LINE (WESTERN GARRETT BORDER)

19,774

(21,475)

I-68	Corridor E	13,106	(15,632)
WV-7 (MD-39)	Veterans Memorial Highway	3,746	(3,542)
US-50	George Washington Highway	1,523	(700)
US-219	Seneca Trail	1,399	(1,601)

POTOMAC RIVER CROSSINGS

138,903

(136,310)

	Bayard Bridge	no data	(no data)
US-50	George Washington Highway	1,324	(1,284)
WV-42 (MD-38)	Blaine Highway	629	(742)
Unsigned WV-46	Beryl Bridge	171	(no data)
WV-46 (MD-36)	Ashfield Street Bridge	5,394	(4,822)
US-220	Memorial Bridge (Keyser)	12,470	(11,901)
WV-956 (MD-956)	Rocket Center Bridge	7,045	(6,502)
WV-28 (MD-942)	Cumberland Blue Bridge	6,405	(6,554)
Alt WV-28 (Unsigned MD-61)	Canal Parkway Bridge	12,023	(10,731)
	Oldtown Toll Bridge	832	(600)
WV-9 (MD-51)	Paw Paw Bridge	1,383	(1,231)
US-522	Hancock Bridge	12,430	(10,911)
US-522	West Potomac Street Bridge (Williamsport)	8,500	(8,580)
I-81		63,715	(65,750)
WV-480 (MD-34)	James Rumsey Bridge (Shepherdstown)	6,582	(6,531)

VIRGINIA

244,797

(268,528)

BLUE RIDGE

36,653

(42,000)

US-340		20,532	(22,000)
WV-9 (VA-9)		16,121	(20,000)

More West Virginia data:

VIRGINIA

244,797

(268,528)

BLUE RIDGE

36,653

(42,000)

US-340		20,532	(22,000)
WV-9 (VA-9)		16,121	(20,000)

APPLE PIE SLICE (EASTERN PANHANDLE)

87,050

(86,740)

US-340	Berryville Pike	12,936	(13,000)
	Leetown Road	no data	(2,200)
	Hardesty Road	no data	(990)
US-11	Winchester Avenue	9,216	(6,300)
I-81		51,307	(53,000)
	Ruebuck Road	no data	(690)
	Runnymeade Road	no data	(970)
WV-45	Apple Harvest Drive	941	(1,200)
	Winchester Grade Road	no data	(850)
	North Timber Ridge Road	no data	(640)
US-522	Valley Road	6,310	(6,900)

SECOND FRONT (CACAPON WATERSHED BOUNDARY)

18,021

(21,720)

WV-127 (VA-127)	Bloomery Pike	5,040	(5,500)
	Timber Ridge Road	no data	(720)
US-522	Northwestern Pike	6,557	(8,800)
WV-259 (VA-259)	Carpers Pike	3,123	(3,500)
US-48/WV-55 (US-48/VA-55)	Strasburg Road	2,581	(3,200)

NORTHERN ROCKINGHAM BORDER

2,146

(2,300)

WV-259 (VA-259)

2,146

(2,300)

THIRD FRONT (SOUTH BRANCH WATERSHED BOUNDARY)

1,682

(1,700)

US-33

Blue-Gray Trail

1,682

(1,700)

NORTHERN HIGHLAND BORDER

700

(700)

US-220

Upper South Branch Road

574

(700)

ALLEGHENY FRONT

9,357

(10,410)

US-250	Staunton-Parkersburg Turnpike	214	(380)
WV-84	Pocahontas Highway	298	(150)
I-64/US-60	Gov. Hulett C. Smith Highway	8,097	(9,100)
WV-311	Kanawha Trail	467	(520)

SOUTHERN ALLEGHANY BORDER (notice the spelling difference)

581

(720)

WV-311

Sweet Springs Valley Road

581

(720)

PETERS MOUNTAIN (NORTHERN CRAIG)

277

(220)

WV-311

Sweet Springs Valley Road

277

(220)

NORTHERN GILES BORDER W/ WESTERN MONROE (NEW RIVER BUMPOUT)

4,710

(8,800)

US-219

Market Street (Giles-Fayette-Kanawha Turnpike)

4,710

(8,800)

NORTHERN GILES BORDER W/ EASTERN MERCER (NEW RIVER BUMPOUT)

7,959

(8,900)

US-219

Corridor Q

7,959

(8,900)

EAST RIVER MOUNTAIN

28,865

(32,180)

I-77/US-52	East River Mountain Tunnel	28,653	(32,000)
WV-598 (VA-598)	Scenic Drive	212	(180)

POCAHONTAS LINE

43,922

(49,139)

US-460	Big Laurel Highway (Corridor Q)	16,257	(16,000)
	Leatherwood Lane	6,469	(no data)
	College Avenue	5,928	(6,100)
	Stadium Drive	5,315	(8,900)
US-19	Bluefield Avenue	4,297	(4,100)
WV-123	Brushfork Road	3,353	(2,600)
WV-102 (VA-102)	Falls Mills Road (Yards)	991	(3,600)
WV-102 (VA-102)	Falls Mills Road (Wolfe)	same data	780
	Pocahontas Avenue	321	(590)

HORSEPEN CREEK / LOW GAP BRANCH

no data

insufficient

	Abbs Valley Road	no data	(590)
	Horsepen Road	no data	(DNQ)
WV-161	Skygusty Road	no data	(no data)

NORTHERN TAZEWELL BORDER

1,717

(1,589)

WV-161	Skygusty Road	489	(no data)
WV-16 (VA-16)	Rocket Boys Drive	1,228	1,100

STATE LINE RIDGE

693

(820)

WV-83

Marshall Highway

693

(820)

KENTUCKY

84,582

(85,261)

TUG RIVER CROSSINGS

55,545

(54,599)

WV-49 (Spur KY-194)	Bill Croaff Memorial Bridge	852	(1,104)
(KY-1056)	Michael Justice Memorial Bridge (Matewan)	2,129	(1,537)
US-119	Gen. Foglesong Bridge (Corridor G)	8,454	(9,672)
US-119/US-52	Thomas H. Farley Bridge (Corridor G)	8,267
US-119/US-52	Joey Dingess Memorial Bridge (Corridor G)	8,449
US-119/US-52	Howard Bannister Memorial Bridge (Corridor G)	same data
US-119/US-52	Bobby Lee Jarrell Memorial Bridge (Corridor G)	7,188
	Hub Cline Bridge (Kermit)	no data	(3,849)
Unsigned WV-37 (Unsigned Spur KY-3)	Louisa-Fort Gay Bridge	7,773	(5,949)

BIG SANDY RIVER CROSSINGS

29,307

(30,662)

I-64	Perry and Gentry Memorial Bridge	22,857	(23,164)
US-60	Billy C. Clark Chestnut Street Bridge	6,450	(7,498)

Notes:
1.   There are numerous minor crossings in the Blacksville and Shamrock area between Monongalia County and Greene County.  Only the WV-218/PA-218 crossing made the list.  There are other crossings with no data that appear to qualify.

2.   Both the Beryl Bridge (unsigned WV-46) and the Louisa-Fort Gay Bridge (unsigned WV-37) are listed here as "unsigned" because there are END WV-46 and END WV-37 signs posted just prior to both of them.

3.   Most of the distinct borders between West Virginia and Virginia have crossings that do not qualify.  Several have no border crossings whatsoever.

4.   The VDOT traffic data for US-219 crossing at Peterstown is nearly double that reported by the DOH.  It is also nearly identical to the US-460 crossing nearby.

5.   Worse, the VDOT traffic data for WV-102/VA-102 crossing at the town of Yards is triple that reported by the DOH.

6.   West of Bluefield, there are several borders where a road follows along the state line.  Several of these do not have a true border crossing, but they are listed if the AADT data for the boundary road qualifies.

7.   In the area surrounding Horsepen (McDowell County), WVDOH and VDOT maps disagree on the topology and number of border crossings for Abbs Valley Road and Horsepen Road.  The latter nearly qualifies, with VDOT reporting an AADT of 480.  WVDOH shows no data for any of these border crossings.

8.   The second Tug River crossing of Corridor G is posted as the Thomas H. Farley Bridge, but it appears to be named after Thomas B. Farley, a local businessman and Masonic .  By the way, the reason KYTC doesn't have AADT data for the four northernmost of these bridges is that WVDOH owns and maintains the entire section.

9.   The fourth Tug River crossing of Corridor G is posted as a memorial to CBM Howard Bannister.  However, the correct U.S. Navy abbreviation for Construction Boatswain Mate is actually CBB.

10.   As is a West Virginia bridge memorial tradition, the I-64 bridge over the Big Sandy River is named for two construction workers who died in a construction accident during the demolition of one the original structures on July 2, 1997.

11.   In many cases, the DOH did not conduct the traffic study at the border crossing.  As such, traffic would have been gained (or lost) to nearby streets and roads prior to the border.  The closest AADT data was utilized, when appropriate.

12.   For crossings marked as "No Data", the totals include the AADT posted by the opposite state agency. 

North Dakota:

Minnesota - 179021
South Dakota - 16120
Montana - 12805
Manitoba - 4185
Saskatchewan - 1395

Rough addition of AADT of crossings along the borders, not surprised by the order at all.

Alright, Nevada (with 2023 AADT). I-15 CA is by far the highest, with I-80 CA a distant second. I-15 AZ, SR 163 AZ, and US 50 CA round out the top 5. None of the Utah crossings top 8000 (though West Wendover combines to about 15000), while none of the Idaho or Oregon crossings top 5000. With the exception of US 50 in South Lake Tahoe, all crossings with daily volumes above 10,000 are in Clark or Washoe Counties.

California:
I-15 - 44000
I-80 - 32000
US 50 - ~24000, no count between Lake Parkway and the state line, but this is what my government knowledge has for that location with big data
SR 28: 12300
US 395 Bordertown - 10200
US 395 Topaz - 5150
SR 88 - 4350
US 95 - 3750
US 6 - 1900 (ironically, this is the highest count along US 6 apart from the US 95 concurrency and SR 318 - Ely)
Needles Highway - 1350
SR 372 - 1400
SR 373 - 740
SR 164 - 730
SR 338 - 450
SR 264 - 310
Daylight Pass - 260
SR 266 - 220
SR 359 - 200
SR 267 - 0 (closed)
No data - Washoe CRs 447 and 8A, other local roads

Arizona:
I-15 - 29700
SR 163 - 26600
I-11 - 19800
Hillside Drive (Mesquite) - 6900

Utah:
I-80 - 7650
BL I-80 - 7100
SR 319 - 660
US 6/50 - 580
SR 233 - 390
SR 487 - 220

Idaho:

US 93 - 4400
SR 229 - 800

Oregon:
US 95 - 3250
SR 140 - 320
SR 291 - 260

Oops.  Woke up this morning and realized that I missed one in the southern part of the state.  WV-635 is a little complicated, as it crosses the State Line Ridge where the traffic volume certainly picks up some of the crossroad traffic from Peapatch Road and Compton Ridge Road (both which follow along the State Line).

Following typical DOH protocol, the closest traffic data for WV-635 is up near Jolo.  That's close enough for "government work", as you might say.  Here's all four chunks.

WV-635           Three Forks Road                984
                      Peapatch Road                   no data        (310)
                      Compton Ridge Road         no data        (480)
(SR-635)          Wimmer Gap Road                                (680)

Using a balanced data concept (which might be valid here, as the traffic data from Wimmer Gap Road is dated 1/01/2023, whereas the traffic data from the cross roads is 10/26/2022, just a few months earlier), then the project for the border crossing would be either (510) or (850).  The latter value seems more appropriate, given the traffic volume out of Jolo.  Let's try this as a correction:

VIRGINIA (corrected)          245,781    (269,378)

	STATE LINE RIDGE	1,677	(1,670)
WV-635	Three Forks Highway	984	(850)
WV-83	Marshall Highway	693	(820)

Because editing the tables that I've already posted is quite wonky, this will just have to do.   :pan: Nit-picking myself to death!

Quote from: texaskdog on December 24, 2024, 03:05:57 PMTexas I would guess: LA, Mexico, OK, AK, NM though not sure where Mexico would actually fall.

I was interested in figuring this out, and the results were not what I expected. Feel free to check my work, cause I am not sure if this is all accurate, but all information either comes from the TxDOT AADT Viewer (https://experience.arcgis.com/experience/6c0166bfc5144afe83926a3a529a8d03) or Wikipedia (for a rough estimate for a couple of Mexico bridges). Keep in mind that local roads were not counted, so the totals for Arkansas, New Mexico, and Oklahoma are probably a bit higher.

Here are the rankings for total AADT, followed by each border's biggest contributor to that total:

1. New Mexico - 182,895 AADT (I-10 - 35,190)
2. Oklahoma - 167,712 AADT (I-35 - 52,466)
3. Louisiana - 131,540 AADT (I-10 - 50,329)
4. Tamaliupas - 112,789 AADT (I-69W - 21,239)
5. Arkansas - 76,858 AADT (I-30 - 44,636)
6. Chihuahua - 44,204 AADT (I-110 - 30,635)
7. Coahuila - 15,328 AADT (Camino Real - 8304)
8. Nuevo Leon - 3466 AADT (TX 255 - 3466)

I am quite honestly pretty shocked that New Mexico was the highest, but it seems that El Paso accounts for most of those crossings (at least 70k worth), and there is a lot of oil traffic between Texas and New Mexico.

Quote from: CoreySamson on January 08, 2025, 02:33:41 PMI am quite honestly pretty shocked that New Mexico was the highest, but it seems that El Paso accounts for most of those crossings (at least 70k worth), and there is a lot of oil traffic between Texas and New Mexico.

My gut would have picked NM just because of the two cross-country interstates that hit the border as well as the proximity of El Paso to Las Cruces.

Wow. I never would have guessed NM for Texas either. I'm struck by how "everything is bigger in Texas" also applies to the distance from its major cities to the state line. Unless you count Texarkana, El Paso is really the only major Texas city that has *any* degree of commuter patterns to another state. Downtown Houston is a sneaky 2 hours from the Louisiana line, and downtown Dallas is almost as far from Oklahoma.

Quote from: JayhawkCO on January 08, 2025, 02:40:21 PM

Quote from: CoreySamson on January 08, 2025, 02:33:41 PMI am quite honestly pretty shocked that New Mexico was the highest, but it seems that El Paso accounts for most of those crossings (at least 70k worth), and there is a lot of oil traffic between Texas and New Mexico.

My gut would have picked NM just because of the two cross-country interstates that hit the border as well as the proximity of El Paso to Las Cruces.

Quote from: webny99 on January 08, 2025, 03:53:52 PMWow. I never would have guessed NM for Texas either. I'm struck by how "everything is bigger in Texas" also applies to the distance from its major cities to the state line. Unless you count Texarkana, El Paso is really the only major Texas city that has *any* degree of commuter patterns to another state. Downtown Houston is a sneaky 2 hours from the Louisiana line, and downtown Dallas is almost as far from Oklahoma.

I also failed to mention that there's a decent mount of traffic going between Texas and Clovis/Hobbs since those are the largest cities for a quite a ways and they aren't far from the border.

For New Jersey:
1. New York.
Has to be. Especially because of the three Hudson River crossings into NYC and the world's busiest vehicular bridge, the George Washington Bridge.
2. Pennsylvania. Longest border geographically, but other than Philadelphia and the Lehigh Valley, the entire NJ/PA border may not be as much combined as NYC.
3. Delaware. Only 2 crossings, and only 1 fixed crossing, the Delaware Memorial Bridge.

Busiest and least busy crossings:
NJ/NY:
Busiest: George Washington Bridge
Least busy: CR 521/CR 16

NJ/PA:
Busiest: Walt Whitman Bridge
Least busy: Riegelsville Bridge

NJ/DE:
Busiest: Delaware Memorial Bridge
Least busy: Cape May - Lewes Ferry

Since we were talking about the NM/TX border, I decided to do New Mexico.

Highway	State	AADT
I-10	TX	37056
I-25	CO	23230
I-40	AZ	18633
I-40	TX	15817
US60	TX	13556
I-10	AZ	12196
NM264	AZ	11345
US70/84	TX	10918
US62/180	TX	9469
NM18	TX	9360
US550	CO	8996
NM88	TX	7135
NM213	TX	6326
US56/64/412	OK	6321
NM136	Chihuahua	5910
US64	AZ	5321
US87	TX	5022
NM176	TX	4698
US491	CO	4428
NM478	TX	4375
NM273	TX	4130
NM28	TX	3512
US285	TX	3439
US84	CO	3217
US54	TX	3079
US62	TX	2552
NM83	TX	2424
NM170	CO	2326
US380	TX	2051
US160	CO	1936
US160	AZ	1791
NM128	TX	1555
US285	CO	1534
US54	TX	1282
US82	TX	1253
NM53	AZ	1106
NM17	CO	1055
NM202	TX	943
NM348	TX	883
US70	AZ	872
NM522	CO	810
US60	AZ	568
NM133	TX	567
US180	AZ	490
NM80	AZ	375
NM511	CO	286
NM78	AZ	273
NM241	TX	160
NM114	TX	154
NM235	TX	136
NM114	Chihuahua	120
NM321	TX	106
NM125	TX	91
NM81	Chihuahua	84
NM19	TX	83
NM417	TX	72
NM551	CO	64
NM262	TX	55
NM456	OK	52
NM410	OK	15

TX: 161,667
AZ: 52,970
CO: 47,882
OK: 6,388
Chihuahua: 6,114

These are 2017 numbers, which is the last that I have but NM doesn't make it easy to find all of their AADT numbers.

Took a stab at this for Maryland - used SHA's traffic count GIS map and grabbed 2022 AADT for every line touching a border (which means that not every single crossing is accounted for, but these would likely be low-volume county-maintained roads anyway). Total volumes for state/district below, along with the busiest individual crossings for each:

District of Columbia: 1,053,221
MD 201/DC 295 Kenilworth Avenue Freeway 139,810
US 50 John Hanson Highway/New York Avenue 123,520
I-295 Anacostia Freeway 82,723
MD 185 Connecticut Avenue 44,445
Suitland Parkway 39,610
MD 650 New Hampshire Avenue 38,695
US 29 Georgia Avenue 37,224
MD 210 Indian Head Highway/S Capitol Street 32,225
MD 5 Branch Avenue 30,164
MD 355 Wisconsin Avenue 29,222
MD 390 16th Street 27,040

Virginia: 561,043
I-95/I-495 Woodrow Wilson Memorial Bridge 243,160
I-495 American Legion Memorial Bridge 229,372
US 340 Sandy Hook Bridge 21,538
US 15 Point of Rocks Bridge 21,174
US 13 Ocean Highway/Lankford Highway 18,810
US 301 Governor Harry W. Nice Memorial Bridge 18,460

Pennsylvania: 363,858
I-81 Maryland Veterans Memorial Highway 64,701
I-83 Baltimore-Harrisburg Expressway 42,130
US 15 Catoctin Mountain Highway 22,632
I-70 Eisenhower Memorial Highway 21,332
MD 30/PA 94 Hanover Pike 15,530
MD 45/SR 3001 York Road 11,050

Delaware: 314,187
I-95 JFK Memorial Highway/Delaware Turnpike 61,965
US 40 Pulaski Highway 32,505
US 13 Ocean Highway/Sussex Highway 28,845
MD 528/DE 1 Coastal Highway 27,692
MD 279/DE 279 Elkton Road 23,115
US 113 Worcester Highway/DuPont Boulevard 22,301
MD 404/DE 404 Shore Highway 13,811
US 301 Blue Star Memorial Highway 11,455

West Virginia: 157,778
I-81 Potomac River Bridge 65,750
I-68 National Freeway 15,632
US 220 Keyser Bridge 11,901
US 522 Hancock Bridge 10,911
MD 61/WV 28 Canal Parkway Bridge 10,731

Ontario AADT from 2019.

Ontario-Quebec. Note that this is only for provincial highways, so crossings between Ottawa and Gatineau are not included. I only included the major ones as I don't have time to search for all crossings in the North.

Highway 401/Aut 20: 13,600
Highway 417/Aut 40: 20,300

Ontario-Michigan. Note that this is only for provincial highways, so Ambassador Bridge isn't included since Huron Church Road is maintained by the City.

Highway 402/I-93: 12,500


Ontario-New York. Note that Rainbow bridge isn't included since the approach is owned by City of Niagara Falls.

QEW/I-190 Buffalo: 14,800
Highway 405/I-190 Lewiston: 8,050


Ontario-Manitoba

Highway 17/TCH Highway 1: 4,900

Quote from: andrepoiy on January 12, 2025, 10:58:17 AMOntario AADT from 2019.

Ontario-Quebec. Note that this is only for provincial highways, so crossings between Ottawa and Gatineau are not included. I only included the major ones as I don't have time to search for all crossings in the North.

Highway 401/Aut 20: 13,600
Highway 417/Aut 40: 20,300

Ontario-Michigan. Note that this is only for provincial highways, so Ambassador Bridge isn't included since Huron Church Road is maintained by the City.

Highway 402/I-93: 12,500


Ontario-New York. Note that Rainbow bridge isn't included since the approach is owned by City of Niagara Falls.

QEW/I-190 Buffalo: 14,800
Highway 405/I-190 Lewiston: 8,050


Ontario-Manitoba

Highway 17/TCH Highway 1: 4,900

Hmm... looks like MTO's sparse network combined with nothing making Canadian provinces collect data on non-provincial routes (unlike US states, which are required by FHWA to collect data on all federal aid routes, even local ones) makes for sparse data.  I was curious, so I compiled some stats using data from the surrounding jurisdictions (although Michigan and NY actually use traffic statistics from the South Niagara Chamber of Commerce (https://southniagaracc.com/2023-border-traffic-statistics/) as MDOT doesn't have data for the Detroit-Windsor crossings, and I used it for all of them for consistency, bar the Cape Vincent Ferry, which they don't have).  It doesn't change the ranking, however.

Québec - 143,540
This is still lacking a ton of local crossings, but it isn't even close.
RR 2/QC 338 1,500
ON 401/A-20 22,200
RR 18/QC 340 620
RR 10 750
ON 417/A-40 20,700
Ch. des Outaouois 970
QC 344 13,600
QC 315 3,200
A-5 67,000
RR 653/QC 301 2,130
ON 148/QC 148 5,500
RR 635 420
ON 63/QC 101 1,570
ON 65 2,360
ON 66/QC 117 450
ON 101/QC 338 460
Translimit Road 110

New York - 39,960
Interesting how this number is lower than the one computed with NYSDOT data earlier.
QEW 12,287
Rainbow Bridge 4,995
Whirlpool Bridge 1,037
ON 405/I-190 7,992
Cape Vincent Ferry 315
ON 137/I-81 5,166
NY 812/Ogdensburg-Prescott Bridge 1,465
Seaway International Bridge 6,703

Michigan - 39,650
I-75 2,660
ON 402/I-94/I-69 9,953
Detroit-Windsor Tunnel 10,172
Ambassador Bridge 16,865
ON 401/Gordie Howe Bridge 0

Manitoba - 5,820
MB 315 100
MB 312 410
ON 417/TCH 1 5,310

Minnesota - 3,804
I was surprised it was this low.  I would have thought at least ON 61/MN 61 would have more, given that Duluth is a decent-sized metro area and Thunder Bay is THE big city in that part of Ontario.  Is this why the only connection on the US side is a lowly state route, not even a US route, much less I-35?
ON 11/MN 72 1,200
US 53 1,406
ON 61/MN 61 1,198

And, of course, Nunavut, Ohio, and Pennsylvania are tied at 0.

Quote from: vdeane on January 12, 2025, 03:06:48 PMOhio

I wouldn't be so sure. There's probably some people that take the ferry from Leamington to one of the Ohio islands.

Quote from: Great Lakes Roads on December 22, 2024, 03:21:59 AMFor Indiana:

1. Illinois- I-80/94 and the Indiana Toll Road to Chicago. Loads of semis, tourist and commuter traffic on one highway.

2. Michigan- mainly I-94 with semi and tourist traffic!

3. Ohio- I-70 (truck traffic) and the Ohio Turnpike!

4. Kentucky- Bridge crossings (Louisville mainly).

I-80/94 has to be one of the highest volume state line crossings in the nation.

For California, I can't imagine many people crossing into Nevada via CA-299. It's just a dirt road on the Nevada side.

Quote from: pderocco on December 22, 2024, 03:39:01 AMRoute 167 is the desolate road that connects Mono Lake to NV-359 to Hawthorne. Don't break down on that road.

Ah, so I was close. Looks like 299 is the second least traveled crossing.

The odd thing is I recall reading somewhere (maybe here?) that 167 was being promoted as some kind of California-to-Idaho connector for commercial traffic. Like trucks were taking 167 because it was a quicker way to reach Idaho than any other option.

167 is also notable for being almost a perfect straight line. You can see it travel more than 15 miles into the distance from the 395 junction.

Louisiana - gotta be

1. Texas
2. Mississippi
3. Arkansas

Would love to see data on these state line crossings.

South Carolina is North Carolina over Georgia as the Charlotte metro area has major cross-border traffic from SC to NC and back. I-77 is over 180,000 cars a day at the SC/NC line at Carowinds.

Myrtle Beach also has some NC to SC and back traffic as you have southern Brunswick County which is basically Myrtle Beach's exurbs. Also traffic on 26 going from SC to NC with South Carolinians going to the mountains.

SC and GA are close too, with Augusta and Savannah both being bi-state metros.