State with most US route concurrencies

[sandiaman]

 Concurrencies in the Land of Enchantment:
not counting Interstates
US  54: US 60,  US 70,
US 56: US  412 (the entire length in NM)
US 60: US 84, US 70,  US 285,  I-25
US  64:  US 87, US  84, US 550, US 491
US 70:  US60, US 84, US 285, US 380,  US 54, US 180, I 25
US 84: US  60, US 64, US 285 I-40, I-25
US 62:   US 180 (the entire length in NM)  US 285         

[Road Hog]

Found a quad US concurrency in Brownwood, TX last week: 67, 84, 183, 377.

The 380-69 concurrency in Greenville is BS. 380 terminates at 69 but is co-signed with 69 to the I-30 interchange so people can find it.

[Greybear]

May I remind everyone that US 380 was on the Greenville loop before US 69 was.  Up until the late 70s or early 80s, US 69 went through downtown Greenville along what is now known as Business US 69.

[briantroutman]

Pennsylvania has quite a few:

[Brackets indicate a concurrency was already accounted for on the other route's list.]

US 1: US 322, US 13
US 6: US 322, US 19, US 62, US 11, US 209
US 11: US 15, [US 6]
US 13: US 30 (debatable), [US 1]
US 15: [US 11], US 220
US 19: US 40, US 22, US 30, US 62, [US 6], US 322
US 22: US 30, [US 19], US 119, US 522, US 322
US 30: [US 22], US 222, [US 13] (debatable)
US 40: [US 19], US 119
US 62: [US 19], US 322, [US 6]
US 119: [US 40], [US 22]
US 202: US 322
US 209: [US 6]
US 219: US 322
US 220: US 322, [US 15]
US 222: [US 30], US 422
US 322: [US 6], [US 19], [US 62], [US 219], [US 220], [US 22], US 522, [US 202], [US 1]
US 522: [US 22], [US 322]

[txstateends]

The 380-69 concurrency in Greenville is BS. 380 terminates at 69 but is co-signed with 69 to the I-30 interchange so people can find it.

http://www.txdot.gov/tpp/hwy/us/us0380.htm

[SSOWorld]

...and one would think WI has a lot
2 and 53,
2 and 141,
8 and 63,
8 and 45,
8 and 141,
10 and 12,
10 and 51 (conveniently hidden by I-39 - or not)
10 and 45,
41 and 141,
41 and 45,
61 and 151,
18 and 61,
14 and 61,
now the following will make it interesting:
12, 14, 18 and 151 make a quad concurrency on the Madison Beltline - 12 and 18 go east, 18 and 151 go southwest, while 12 and 14 go northwest - for a short bit.
add the former US-16 (now WIS-16) and you got a looooong one from Tomah to the Dells with 12. and then 14 and 16 in La Crosse

but Wisconsin loses due to the previous posts

[kurumi]

Connecticut has portions of US Routes 1, 5, 6, 7, 44 and 202.
...
Did I miss anything?

Some of the US 44 overlaps. The list of US/US concurrencies is 5/44 (East Hartford), 6/7/202 (and I-84, Danbury), 6/44 (Manchester/Bolton), 6/202 (Danbury), 7/44 (Canaan), 7/202 (New Milford), 44/202 (Canton/Simsbury/Avon). There was a historical 5/6 overlap across the Charter Oak Bridge from 1942 to c. 1970.

[myosh_tino]

Plus Georgia you have to admit has more US routes per square mile than any other state including the big one's like NY and CA which is another factor to add.

Speaking of California, I believe we are the state with the *least* number of US route concurrencies... ZERO!  We only have 5 6 7 US routes (6, 50, 95, 97, 101, 199 and 395) and only 2 cases where two US routes intersect (101-199 and 395-6).

Edit 1: Oops, forgot about US 97 
Edit 2: Oops again, forgot about US 95 

[english si]

^^ Hawaii and Alaska too, but not anywhere near as impressive...

The two examples of 'big states', New York and California, have never been fans of the US highway system, instead going with sparse networks (though CA had a fairly extensive network before the Interstates came), plus if you are doing per sq mi, then a bigger state is already at a disadvantage even if the big state has lots of US highways.

[mjb2002]

Of Georgia's 25 US routes, only three have no concurrencies and only six others have fewer than five. US 129 is the state's record-holder, joining with a total of thirteen other routes in its journey across the state.

The full list:

US 1 - 23, 301, 82, 84, 221, 78, 278, 25
US 11 - none
US 17 - 80 (and I-516 and I-16)
US 19 - 84, 82, 280, 80, 41, 29, 78, 278, 129 (and I-285)
US 23 - 1, 301, 82, 84, 341, (129 Alt), 80, 129, 29, 78, 278, 129 (again), 441, 76 (and I-985)
US 25 - 341, 301, 84, 80, 1, 78, 278
US 27 - 84, 280, 29, 278, 411
US 29 - 27, (27 Alt), 19, 41, 78, 278, 23, 78 (again), 129, 441
US 41 - 221, 129, 19, 29, 78, 278, 411, 76 (and I-75)
US 76 - 41, 411, 23, 441
US 78 - 278, 19, 41, 29, 23, 29 (again), 129, 441, 278 (again), 1, 25
US 80 - 19, 129, 23, (129 Alt), 319, 25, 17 (and I-516)
US 82 - 19, 319, 129, 1, 23, 84
US 84 - 17, 319, 19, 221, 1, 23, 82, 25, 301
US 123 - none
US 129 - 221, 82, 319, 341, 41, 80, 23, 441, 278, 29, 78, 23, 19 (and I-985)
US 221 - 84, 41, 129, 441, 319, 1
US 278 - 27, 78, 19, 41, 29, 23, 129, 441, 78 (again), 1, 25 (and I-20)
US 280 - 27, 19, 319, 441
US 301 - 1, 23, 25, 84
US 319 - 84, 82, 129, 441, 280, 80, 221
US 341 - 25, 23, (129 Alt), 129
US 378 - none
US 411 - 27, 41, 76
US 441 - 221, 319, 280, 129, 278, 29, 78, 23, 76

Georgia may very likely be the winner, here. 

Thanks for the research!

If you include secondary routes, such as state routes (GA 121), Georgia will be the clear winner.

[Beeper1]

In Massachusetts, there is only one US route overlap:  the short US-20/US-202 overlap in Westfield.

In fact, in eastern Mass, many of the US routes (US-1, US-3, US-6, US-44) never even touch another US route.

The only US route intersections in the state are in the western part: 20/202 in Westfield, 5/20 in West Springfield, and 5/202 in Holyoke.

[hbelkins]

In Massachusetts, there is only one US route overlap:  the short US-20/US-202 overlap in Westfield.

In fact, in eastern Mass, many of the US routes (US-1, US-3, US-6, US-44) never even touch another US route.

The only US route intersections in the state are in the western part: 20/202 in Westfield, 5/20 in West Springfield, and 5/202 in Holyoke.

[Jim]

In Massachusetts, there is only one US route overlap:  the short US-20/US-202 overlap in Westfield.

In fact, in eastern Mass, many of the US routes (US-1, US-3, US-6, US-44) never even touch another US route.

The only US route intersections in the state are in the western part: 20/202 in Westfield, 5/20 in West Springfield, and 5/202 in Holyoke.

In addition to the significant 7-20 overlap in the Berkshires, we have 5 and 202.  They don't just cross in Holyoke, they overlap, at least SB.  This is in front of Nick's Nest:

[Beeper1]

[Facepalm]  My bad.   I don't know why I always seem to forget US-7.     Used to travel that overlap several times a year, too.

I havn't been through Holyoke in a long time, but is the 5/202 overlap only for SB 202?  I seem to remember NB 202 just crossing 5.

[Jim]

I havn't been through Holyoke in a long time, but is the 5/202 overlap only for SB 202?  I seem to remember NB 202 just crossing 5.

I also haven't been through in a few years, at least, but when I used to travel that way regularly, US 202 NB did in fact cross US 5 then follow Beech St. up to the big rotary just before the bridge to South Hadley.  US 202 SB leaves the rotary then meanders its way via Lincoln St. to its concurrency with US 5 along Northampton St.

[bassoon1986]

Louisiana has more than I thought

11- (only with I-59)
51- (only with I-55)
61- 190
63- 167
65- none
71- 371, 84 167 (twice), 165, (and with I-20)
79- 80
80- 79, 167, (and I-20)
84- 171, 371, 71, 167, 425
90- 167
165- 425, 71
167- 63, 80, 84, 71 (twice), 90, (I-49 twice)
171- 84
190- 61
371- 71, 84, (and I-20)
425- 165, 84

[SkyPesos]

Excuse the bump, found this when trying to search for another thread. List for Ohio from West to East or South to North.

Ohio:
6 - 24, 20, 20, 42, 322, 20
20 - 127, 23, 6, 6, 42, 322, 6
22 - 62, 40, 250
23 - 35, 50, 33, 62, 42, 30, 20, 223
24 - 6
27 - 52, 42, 127
30 - 224, 23, 250, 62
33 - 36, 23, 62, 50
35 - 23, 50
36 - 127, 33, 42
40 - 62, 22, 250
42 - 127, 27, 52, 23, 36, 250, 224, 6, 20
50 - 23, 35, 33
52 - 27, 127, 42, 62, 68
62 - 68, 52, 22, 23, 33, 40, 250, 30
68 - 62, 52
127 - 42, 27, 52, 36, 224, 20
223 - 23
224 - 30, 127, 42
250 - 42, 30, 62, 22, 40
322 - 6, 20
422 - None

[SEWIGuy]

...and one would think WI has a lot
2 and 53,
2 and 141,
8 and 63,
8 and 45,
8 and 141,
10 and 12,
10 and 51 (conveniently hidden by I-39 - or not)
10 and 45,
41 and 141,
41 and 45,
61 and 151,
18 and 61,
14 and 61,
now the following will make it interesting:
12, 14, 18 and 151 make a quad concurrency on the Madison Beltline - 12 and 18 go east, 18 and 151 go southwest, while 12 and 14 go northwest - for a short bit.
add the former US-16 (now WIS-16) and you got a looooong one from Tomah to the Dells with 12. and then 14 and 16 in La Crosse

but Wisconsin loses due to the previous posts

The quad currency once also included WI-13 before it was truncated back to the Dells.

[US 89]

Utah doesn't have a whole lot of US routes, so we have:

6/50 (west)
6/89
6/191
6/50/191 (unsigned - thanks a lot, I-70)
6/50 (east - unsigned, see above)
40/189
40/191
50/89
89/91
163/191 (unsigned, and only exists depending on which document you look at)



Wyoming, on the other hand, has to be the winner among western states and probably in the whole country if you look just at what percent of US route mileage is concurrent with something else. They have:

14/16/20
14/87 (with I-90)
14/16 (partly with I-90)
14A/310
16/20
18/20
18/20/85
18/85
20/26
20/26/87 (partly also with I-25)
26/89
26/89/189/191
26/89/191
26/287
26/87 (with I-25)
26/85
30/189
30/191 (with I-80)
30/287 (partly also with I-80)
85/87 (with I-25)
89/191/287
189/191

Matter of fact, the only Wyoming US route with no concurrencies is US 212, which doesn't even connect to any other US routes in the state!

[SkyPesos]

Going to try Indiana too, as the state is known for that one beltway with five US routes on it at one point (my new profile picture  ).

6 - 41, 421, 35, 33
12 - 20, 41, 20
20 - 12, 41, 12, 31
24 - 52, 231, 421, 35, 33, 30
27 - 33, 224
30 - 33, 24
31 - 36, 40, 421, 52, 35, 20
33 - 27, 224, 24, 30, 6
35 - 31, 24, 6
36 - 40, 31, 421, 52
40 - 36, 31, 52, 421
41 - 50, 150, 136, 52, 6, 12, 20
50 - 41, 150, 231, 421
52 - 24, 41, 231, 421, 31, 36, 40
131 - None
136 - 41
150 - 41, 50, 231
224 - 27, 33
231 - 50, 150, 52, 24
421 - 50, 31, 36, 40, 52, 24, 6

[kenarmy]

Might as well.

MS
____
US 11- (US 80, I-59)
US 45- (US 82, US 278)
US 49- (US 51[hidden], US 61, US 278, I-55, I-220, I-20)
US 49E- (US 82)
US 51- (US 49, I-55, I-20)
US 61- (US 49, US 61, US 84, US 278, I-20)
US 72- none.
US 78- none. (I-22)
US 82- (US 45, 49E, US 278)
US 84- (US 61, US 425 [ew] [US 98??], I-59)
US 90- none.
US 98- (I-55, I-59, [US 84??])
US 278- (US 45, US 49, US 61, US 82)
US 425- (*sigh* US 84)
- There were more concurrencies before highways got rerouted onto bypasses (US 49/98, US 45/11/80, US 51/98 etc..)

[hbelkins]

The only US routes in Kentucky that don't have concurrencies are 25E, 25W and (I think) 79. (I'm not sure if there is short concurrency where 79 crosses 41 or not; seems like I remember that intersection was going to be rebuilt.)

US 60 has a concurrency with every US route it intersects where the other route does not terminate.

After further review, this is incorrect. I don't know how I could have forgotten US 127, which has been routed across the western connector for years.

Also, after the rerouting of US 60 on the Newtown Pike extension, it no longer has a concurrency with US 27 and US 68

[NWI_Irish96]

Indiana might be a contender for a couple of reasons: It's a primarily PLSS-grid state, but there are still plenty of diagonal routes, some of which zigzag along east-west and north-south roads for long stretches rather than making a straight line from Point A to Point B (US 35 comes to mind). Also, as of late, INDOT has rerouted plenty of US highways around cities, creating more concurrencies than ever before. I'll crunch some numbers later.

I found out that Indiana has 20 US routes and 33 concurrencies, making it 1.65 per route. The total mileage of US Routes in Indiana is 2826 miles, and about 8.8% of that (250 miles or so) is part of a concurrency. To prevent double- and triple-counting for mileage, I defined 2-, 3-, 4-, and 5-way concurrencies differently. I realize that this might have skewed the number of concurrencies a bit based on definition, but what else am I supposed to do with the mess around Indianapolis?

The 2 longest concurrencies are US 41/150 (55.83 miles) and US 50/150 (37.67 miles), which leads me to question why US 150 even exists north/west of Shoals, but that's another topic. The average length of a concurrency is 7.52 miles, but throwing out the US 150 concurrencies would make it 4.6 miles.

Ok, well, there's Indiana. What do the numbers look like for Georgia, Arkansas, and Wyoming?

Yeah, the routing of highways onto 465 and 469 definitely increased the concurrency mileage, but the very long concurrency of 150 with 50 and 41 really jacks up the total. Every US highway in Indiana has at least one concurrency, with 224 and 136 each having a single concurrency of less than a mile.

[SkyPesos]

Every US highway in Indiana has at least one concurrency, with 224 and 136 each having a single concurrency of less than a mile.

US 131?

[NWI_Irish96]

Every US highway in Indiana has at least one concurrency, with 224 and 136 each having a single concurrency of less than a mile.

US 131?

I always forget about 131.