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Author Topic: Highest & Lowest AADT by State and Route Type  (Read 18368 times)

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Re: Highest & Lowest AADT by State and Route Type
« Reply #25 on: February 19, 2021, 06:20:47 PM »

Wow. It seems the Downtown Connector in Atlanta has taken over the number one spot from the 405.

Also, I didn't realize that I-405 in California wasn't even the highest freeway in California, which is CA60 with 461,000 near the City of Industry.

I didn't realize that either. That's definitely a surprise.
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Re: Highest & Lowest AADT by State and Route Type
« Reply #26 on: February 19, 2021, 06:27:22 PM »

I would think that the highest traffic along DE 1 would be between US 301 and I-95 somewhere.
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JayhawkCO

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Re: Highest & Lowest AADT by State and Route Type
« Reply #27 on: February 19, 2021, 06:35:01 PM »

I would think that the highest traffic along DE 1 would be between US 301 and I-95 somewhere.

You're right.  The .pdf's mileage isn't labeled correctly.  It's the stretch between US13 and I-295.  Updated.

Chris
« Last Edit: February 19, 2021, 06:39:09 PM by jayhawkco »
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Re: Highest & Lowest AADT by State and Route Type
« Reply #28 on: February 19, 2021, 06:43:57 PM »

This is really cool. WI's seem pretty accurate, though I'm not sure what's up with it saying that I-41 and I-94 are concurrent at the busiest point. They're not concurrent until I-94 MM 310 or so. But MM 304 on I-94 would be the busiest point in the state without a doubt.
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JayhawkCO

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Re: Highest & Lowest AADT by State and Route Type
« Reply #29 on: February 19, 2021, 06:52:46 PM »

More context for a state people rarely post about:

Wyoming
I-25: In Casper along the 20/26/87 concurrency.  This is probably one of the few cases of the highest AADT not being in the state's largest metro (or micro) area.
I-90: Northeastern Wyoming between I-25 and Gillette

US26/89/191: Between Jackson and WY22 which leads over Teton Pass to Victor, ID
US87: The northern stub of the landslide closed segment

WYO59: In Gillette just south of I-90
WYO28: In southwestern Wyoming about 20 miles NE of Farson on the way to Lander.

Chris

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Re: Highest & Lowest AADT by State and Route Type
« Reply #30 on: February 19, 2021, 06:53:39 PM »

The highest segment for I-15 in Utah is actually along its concurrency with I-80 if you wanted to list both.

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Re: Highest & Lowest AADT by State and Route Type
« Reply #31 on: February 19, 2021, 06:56:03 PM »

This is really cool. WI's seem pretty accurate, though I'm not sure what's up with it saying that I-41 and I-94 are concurrent at the busiest point. They're not concurrent until I-94 MM 310 or so. But MM 304 on I-94 would be the busiest point in the state without a doubt.

That was just a typo on my part.  I'm changing to MM 315.  It's just south of the interchange with I-894, unless the spot you're thinking about is higher (I don't have access to it at the moment). The MMs were the toughest thing to get accurate on this since some of the data is from state lines, some is from county lines, some is from the point of a name change of the highway.  Updated.  Wisconsin was another state where I just had to pan the map, so I might have missed some more extreme data, so please let me know if you find any more goofs.

Chris
« Last Edit: February 19, 2021, 07:32:11 PM by jayhawkco »
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JayhawkCO

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Re: Highest & Lowest AADT by State and Route Type
« Reply #32 on: February 19, 2021, 06:57:39 PM »

The highest segment for I-15 in Utah is actually along its concurrency with I-80 if you wanted to list both.

Done.

Chris

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Re: Highest & Lowest AADT by State and Route Type
« Reply #33 on: February 19, 2021, 08:08:01 PM »

This is really cool. WI's seem pretty accurate, though I'm not sure what's up with it saying that I-41 and I-94 are concurrent at the busiest point. They're not concurrent until I-94 MM 310 or so. But MM 304 on I-94 would be the busiest point in the state without a doubt.

That was just a typo on my part.  I'm changing to MM 315.  It's just south of the interchange with I-894, unless the spot you're thinking about is higher (I don't have access to it at the moment). The MMs were the toughest thing to get accurate on this since some of the data is from state lines, some is from county lines, some is from the point of a name change of the highway.  Updated.  Wisconsin was another state where I just had to pan the map, so I might have missed some more extreme data, so please let me know if you find any more goofs.

Chris
I've heard from a few different places that I-94 just west of the Marquette Interchange is the busiest, but I trust you more.
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Re: Highest & Lowest AADT by State and Route Type
« Reply #34 on: February 19, 2021, 08:25:40 PM »

Impressive work. You can find the downloadable in Illinois under Maps inn the A to Z index.
Part of Illinois 83 is a little higher than the 390 tollway.
US 41 is Lake Shore Drive.
Illinois 94 was part of a supplemental freeway corridor study.
Part of US 34 in Bureau County is 1000 a day.

And Interstate 180
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Re: Highest & Lowest AADT by State and Route Type
« Reply #35 on: February 19, 2021, 08:38:59 PM »

The highest AADT in the 404 area code (Atlanta) is 404 k :wow:
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Re: Highest & Lowest AADT by State and Route Type
« Reply #36 on: February 19, 2021, 08:54:06 PM »

Impressive work. You can find the downloadable in Illinois under Maps inn the A to Z index.
Part of Illinois 83 is a little higher than the 390 tollway.
US 41 is Lake Shore Drive.
Illinois 94 was part of a supplemental freeway corridor study.
Part of US 34 in Bureau County is 1000 a day.

And Interstate 180

Thank you for the updates!  Illinois was another with only maps, and I didn't find those specific maps so I was using the large ones with the need to go all over the state.  Much easier here.  OP updated.  I wouldn't have thought that region of Illinois would have had lower counts than west central, so I didn't focus my search there for U.S. highways.

Chris

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Re: Highest & Lowest AADT by State and Route Type
« Reply #37 on: February 19, 2021, 08:57:58 PM »

This is really cool. WI's seem pretty accurate, though I'm not sure what's up with it saying that I-41 and I-94 are concurrent at the busiest point. They're not concurrent until I-94 MM 310 or so. But MM 304 on I-94 would be the busiest point in the state without a doubt.

That was just a typo on my part.  I'm changing to MM 315.  It's just south of the interchange with I-894, unless the spot you're thinking about is higher (I don't have access to it at the moment). The MMs were the toughest thing to get accurate on this since some of the data is from state lines, some is from county lines, some is from the point of a name change of the highway.  Updated.  Wisconsin was another state where I just had to pan the map, so I might have missed some more extreme data, so please let me know if you find any more goofs.

Chris
I've heard from a few different places that I-94 just west of the Marquette Interchange is the busiest, but I trust you more.

Looks like 152,000 there. So about 30,000 less. 

Chris

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Re: Highest & Lowest AADT by State and Route Type
« Reply #38 on: February 19, 2021, 08:59:11 PM »

This is really cool. WI's seem pretty accurate, though I'm not sure what's up with it saying that I-41 and I-94 are concurrent at the busiest point. They're not concurrent until I-94 MM 310 or so. But MM 304 on I-94 would be the busiest point in the state without a doubt.

That was just a typo on my part.  I'm changing to MM 315.  It's just south of the interchange with I-894, unless the spot you're thinking about is higher (I don't have access to it at the moment). The MMs were the toughest thing to get accurate on this since some of the data is from state lines, some is from county lines, some is from the point of a name change of the highway.  Updated.  Wisconsin was another state where I just had to pan the map, so I might have missed some more extreme data, so please let me know if you find any more goofs.

Chris
I've heard from a few different places that I-94 just west of the Marquette Interchange is the busiest, but I trust you more.

Looks like 152,000 there. So about 30,000 less. 

Chris
Interesting. It must be the airport traffic that makes the area near the Mitchell Interchange busier.
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Re: Highest & Lowest AADT by State and Route Type
« Reply #39 on: February 19, 2021, 09:10:27 PM »

Happy to help. A great reference. The New York Times did a story when the 405 replaced the Dan Ryan as number one.
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Re: Highest & Lowest AADT by State and Route Type
« Reply #40 on: February 19, 2021, 10:09:05 PM »

For Michigan, I'm pretty sure the AADT for I-75 on the International Bridge is higher than 1,355. I'm also pretty sure that the highest AADT on an Interstate is on I-96/275 between 6 and 7 Mile Roads.
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Re: Highest & Lowest AADT by State and Route Type
« Reply #41 on: February 19, 2021, 11:46:48 PM »

For Michigan, I'm pretty sure the AADT for I-75 on the International Bridge is higher than 1,355. I'm also pretty sure that the highest AADT on an Interstate is on I-96/275 between 6 and 7 Mile Roads.

Just rechecked the numbers for interstates and it definitely shows the same numbers I'm seeing.  If you see differently, let me know.  I just redid the math for the International Bridge and it's 1911.  I'll adjust.

Chris

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Re: Highest & Lowest AADT by State and Route Type
« Reply #42 on: February 19, 2021, 11:47:52 PM »

Context for Oklahoma:
I-44 MM 123 is in Northwest Oklahoma City, right at the interchange with other two highways that serve that part of town: SH-3 (Northwest Expressway) and SH-74 (Lake Hefner Parkway). Gateway to your upper-middle-class suburbia.
I-44 MM 31 is south of Lawton, just before the last free exit before the turnpike that carries I-44 to Wichita Falls. Useful, but not a direction most Oklahomans are traveling, clearly.

US-64 looks like it's somewhere in the Tulsa freeway system, possibly at the interchange between the Mingo Valley Expressway and the Broken Arrow Expressway. US-77 is kind of surprising, since it's in a fairly populated corridor its entire time in Oklahoma, but then again no, because I-35 does the same thing as US-77 and does it better.

The SH-3/74 concurrency is part of the aforementioned gateway to Northwest OKC; most of the traffic that passed through the segment of I-44 with the high count also passes through this section of 3/74. I was a little surprised to see SH-49 as the low, since I figured it would have been SH-87 or one of the spurs, but that segment of SH-49 is the back way into the Wichita Mountains Wildlife Refuge, so it makes sense there wouldn't be a ton of traffic there.
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Re: Highest & Lowest AADT by State and Route Type
« Reply #43 on: February 20, 2021, 12:41:37 AM »

I'm just going to say that KY 1679 is a fascinating road. Basically a double-track dirt path in some places that somehow got a state-highway designation.
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Re: Highest & Lowest AADT by State and Route Type
« Reply #44 on: February 20, 2021, 12:56:05 AM »

For Oregon: I-84 MM2 is through the first curves in Hollywood at 39th Ave/Cesar Chavez Blvd
MM2 180 is just east of of I-82.

Technically speaking, US 30 should have top spot because of its overlap with I-84, but US 26 MM 73 is at the eastern Canyon Rd split just west of the tunnel.
I'm unclear about US 395 MM 64, as that can be on one of three distinct segments (Pendleton-John Day, John Day-Burns, Burns-California).

OR 217 MM 2 is between Walker Rd and OR 8, so no surprise there.
OR 413, lol. Runs NNW out of Halfway, from OR 86S and 414.
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Re: Highest & Lowest AADT by State and Route Type
« Reply #45 on: February 20, 2021, 01:30:19 AM »

I'm a little surprised that I-5 south of I-90 beats out I-5 (plus the express lanes) through downtown Seattle itself. I'd be interested to see the actual least-used Interstate segment in Washington, as the border crossing would skew the numbers a bit.
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Re: Highest & Lowest AADT by State and Route Type
« Reply #46 on: February 20, 2021, 01:56:45 AM »

For the California ones, context:


Busiest
I-405 mile marker 22: concurrent with Route 22 heading west towards Long Beach
US 101 mile marker 18: right at the I-405 junction (very unsurprising)
Route 60 mile marker 20: as mentioned earlier, in the city of Industry.  Near the Nogales Street exit and several miles west of Route 57.

Least busy:
I-5 mile marker 781: north of Yreka
US 395 mile marker 557: near McDonald Peak and the town of Termo
Route 299 mile marker 306: end of road at Nevada state border, where the surface goes from paved to gravel
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Re: Highest & Lowest AADT by State and Route Type
« Reply #47 on: February 20, 2021, 02:15:31 AM »

For South Carolina:

I-77- NC/SC state line going out of Charlotte, before Carowinds exit, a huge exit during the summer months with the amusement park, plus all the vacation traffic from OH/WV/PA/Canada heading south
I-185- little-used toll road that barely gets much use other than a cut-through to I-85 from 385, basically paralleling I-85 at this point, at SC 153.

US 17- Ravenel Bridge, pretty much the lifeline of the Charleston area, connecting Charleston to Mt. Pleasant and back.
US 301- north of Manning, between there and Florence, almost a ghost town, bypassed by I-95 40 years ago. Very few people live in that part of SC.

SC 277- Major road connecting downtown Columbia to I-77. This point is between I-20 and 77.
SC 901- At about the most non-descript terminus of two state highways (SC 200). No blinker even. Follows I-77 so all it gets is local traffic and not a lot of people live in that area at all.
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Re: Highest & Lowest AADT by State and Route Type
« Reply #48 on: February 20, 2021, 08:44:46 AM »

I'm a little surprised that I-5 south of I-90 beats out I-5 (plus the express lanes) through downtown Seattle itself. I'd be interested to see the actual least-used Interstate segment in Washington, as the border crossing would skew the numbers a bit.

Outside of the crossing, it's the beginning of I-82 at an AADT of 9500.

Chris

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Re: Highest & Lowest AADT by State and Route Type
« Reply #49 on: February 20, 2021, 09:05:49 AM »

I'm unclear about US 395 MM 64, as that can be on one of three distinct segments (Pendleton-John Day, John Day-Burns, Burns-California).

It's the Lakeview/Burns segment.  It shows an AADT of 220 from MM 37.28 to 90.02 as measured from Riley and US20 (because Oregon does things weirdly).  So, I think technically I should have it at MM70 as measured from the California border if I'm taking the average. (134 miles from Riley to California minus the average of 37.28 and 90.02)

Chris

 


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