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Author Topic: Random facts about interstates and US routes  (Read 48624 times)

SkyPesos

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Random facts about interstates and US routes
« on: October 04, 2021, 10:16:49 PM »

Post whatever random facts about interstates or US routes you have that you find interesting here. They can be as obvious, or as obscure as you like. I had plenty of facts over the past few weeks, but forgot about what all of them are about. Here's two I thought of in the shower today:

Of the x0 interstates (excluding wannabe I-30), I-10 interchanges with the most x5 interstates, while I-70 interchanges with the least. And none of them meet all 10 of them.
90: 5, 15, 25, 35, 55, 65, 75, 95 (8)
80: 5, 15, 25, 35, 55, 65, 75, 95 (8)
70: 15, 25, 35, 55, 65, 75 (6)
40: 15, 25, 35, 55, 65, 75, 85, 95 (8)
20: 35, 45, 55, 65, 75, 85, 95 (7)
10: 5, 15, 25, 35, 45, 55, 65, 75, 95 (9)

Speaking of I-70, it's the only x0 without a 5xx 3di, a common odd first digit for 3dis for some reason, and sometimes, the only odd first digit 3di an interstate has (516, 520, 530, 579, etc). Also, I-40 doesn't have a 3xx 3di, another common first digit.
« Last Edit: October 04, 2021, 10:19:01 PM by SkyPesos »
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jlam

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Re: Random facts about interstates and US routes
« Reply #1 on: October 04, 2021, 10:19:32 PM »

I-25 is the only x5 interstate to interchange with only x0 2dis.

SkyPesos

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Re: Random facts about interstates and US routes
« Reply #2 on: October 04, 2021, 10:20:29 PM »

I-25 is the only x5 interstate to interchange with only x0 2dis.
I-76?

You're right historically though, when I-76 was I-80S.

jlam

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Re: Random facts about interstates and US routes
« Reply #3 on: October 04, 2021, 10:30:55 PM »

I-25 is the only x5 interstate to interchange with only x0 2dis.
I-76?

You're right historically though, when I-76 was I-80S.
I can't believe I forgot the 76.

Max Rockatansky

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Re: Random facts about interstates and US routes
« Reply #4 on: October 04, 2021, 10:45:14 PM »

Historic US Route 40 is better signed than most California State Highways.  Seriously, the City of Fairfield went crazy overboard with US 40 signage. 
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TheHighwayMan394

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Re: Random facts about interstates and US routes
« Reply #5 on: October 04, 2021, 11:54:20 PM »

For its entre length in Wisconsin and a connecting piece of it in Minnesota, what became US 12 was coincidentally already called State Highway 12 in both states.
« Last Edit: October 04, 2021, 11:56:28 PM by TheHighwayMan394 »
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SkyPesos

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Re: Random facts about interstates and US routes
« Reply #6 on: October 04, 2021, 11:57:34 PM »

For its entre length in Wisconsin and a connecting piece of it in Minnesota, what became US 12 was coincidentally already called State Highway 12 in both states.
How common is it for a US route to share the same number with the state route it replaced in a state? Besides what you had for US 12 in WI and MN, US 6 in Indiana used to be IN 6.

Hobart

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Re: Random facts about interstates and US routes
« Reply #7 on: October 05, 2021, 12:13:30 AM »

For some reason, the small portion of Interstate 76 in Nebraska is signed north and south, despite having no interchanges in the state besides Interstate 80.
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kurumi

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Re: Random facts about interstates and US routes
« Reply #8 on: October 05, 2021, 01:04:21 AM »

I-86 is (I think) the only route that has been signed in 3 separate locations (with no intent to connect them). Eventually, New York's 84 and 86 should intersect, so that each of the 86's has met with an 84.

I-86 is also part of (I also think) the only renumbering and revert between two 2-digit interstates (84 to 86 back to 84).

271 and 480 were the only 3dis of different parents to overlap. (Now 785 and 840 also do)
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Bruce

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Re: Random facts about interstates and US routes
« Reply #9 on: October 05, 2021, 01:15:03 AM »

For its entre length in Wisconsin and a connecting piece of it in Minnesota, what became US 12 was coincidentally already called State Highway 12 in both states.
How common is it for a US route to share the same number with the state route it replaced in a state? Besides what you had for US 12 in WI and MN, US 6 in Indiana used to be IN 6.

US 2 was co-signed with a section of Primary State Highway 2 from Cashmere, WA to Spokane, WA, and later replaced it outright in the 1964 renumbering.
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Mapmikey

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Re: Random facts about interstates and US routes
« Reply #10 on: October 05, 2021, 06:29:09 AM »

For its entre length in Wisconsin and a connecting piece of it in Minnesota, what became US 12 was coincidentally already called State Highway 12 in both states.
How common is it for a US route to share the same number with the state route it replaced in a state? Besides what you had for US 12 in WI and MN, US 6 in Indiana used to be IN 6.

Virginia has done this, though not for the initial arrival of the US route.  These were all extended over state route designations of the same number:

US 13
US 17
US 33 (very short segment)
US 258
US 301
US 340
US 522

It appears NC/VA tried to get NC/VA 168 renumbered as US 168
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Quillz

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Re: Random facts about interstates and US routes
« Reply #11 on: October 05, 2021, 06:39:02 AM »

Wyoming's Interstate 180 is not actually an interstate, or even a freeway. It has at-grade junctions, signal lights, etc. It's effectively a glorified 1-mile off-ramp. It's much more similar to Alaska's interstates, in that it has interstate funding, but doesn't conform to interstate standards. As to why it doesn't, I have no idea.
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Rothman

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Re: Random facts about interstates and US routes
« Reply #12 on: October 05, 2021, 06:52:13 AM »

If it's shielded as an Interstate, it's an Interstate.
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GaryV

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Re: Random facts about interstates and US routes
« Reply #13 on: October 05, 2021, 07:26:54 AM »

In Michigan, M-16 became US-16
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NWI_Irish96

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Re: Random facts about interstates and US routes
« Reply #14 on: October 05, 2021, 08:44:31 AM »

US routes 35 and 136 replaced Indiana state highways 21 and 34 after Indiana had established its state highway grid, which is why those two numbers are the only ones < 72 that are not on any state or US highway in Indiana.
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CNGL-Leudimin

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Re: Random facts about interstates and US routes
« Reply #15 on: October 05, 2021, 08:59:05 AM »

US 6, the longest US Route ever. If it's still the longest or has relinquished that title to US 20, is up to debate.
US 30, the only US Route that has always gone coast to coast.
US 81, the true midline of the USA (although I feel US 281 is a better fit).

(All of those are catchphrases I say at BigRigTravels whenever Steve is on or crosses one of those routes. However there I assume US 20 is longer than US 6)

And unlike what happens with I-238, US 138 did in fact branch off a US 38, which was eaten by US 6 early on.
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JayhawkCO

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Re: Random facts about interstates and US routes
« Reply #16 on: October 05, 2021, 10:24:07 AM »

AADT Facts

Highest 2di: 404,000 on I-75/I-85 in Atlanta
Lowest (signed) 2di: 854 on I-95 at the Canadian border in Maine
Lowest (signed, not at a border) 2di: 1,775 on I-90 in Wyoming between Buffalo and Gilette
Lowest (unsigned) 2di: 237 on I-A2 east of Delta Junction

Highest 3di: 377,600 on I-405 in Los Angeles
Lowest 3di: 1,875 on I-180 in Illinois

Highest primary US Route (*not multiplexed): 318,000 on US101 just west of I-405 in Los Angeles
Highest primary (specifically 1 or 2 digit) US Route*: 271,488 on US75 just south of I-635 in Dallas
Lowest primary US Route*: 27 on US3 at the Canadian border in New Hampshire
Lowest primary US Route* (not at a Canadian border): 52 on US87 on the north side of the gap in Wyoming
Lowest primary US Route* (not a "gimmicky" portion): 70 on US19W at the Tennessee/North Carolina border
Lowest primary US Route* (not "gimmicky" and not bannered): 207 on US64 just east of US84 in New Mexico

Highest secondary US Route*: 132,535 on US131 in downtown Grand Rapids
Lowest secondary US Route*:  16 on US191 at the Canadian border in Montana
Lowest secondary US Route* (not at a Canadian border): 134 on US385 north of Marathon, TX

Chris
« Last Edit: October 05, 2021, 01:01:12 PM by jayhawkco »
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Max Rockatansky

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Re: Random facts about interstates and US routes
« Reply #17 on: October 05, 2021, 10:27:22 AM »

Isn’t US 101 considered a two digit US Route with the “10”  being an analog first digit?
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CtrlAltDel

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Re: Random facts about interstates and US routes
« Reply #18 on: October 05, 2021, 10:27:50 AM »

More interstate facts than you can shake a stick at, although some of them are out of date:

https://www.fhwa.dot.gov/interstate/previousfacts.cfm

For example, there's this:

Quote
March 27, 2010:   The most common types of bridge on the Interstate System:

Stringer/Multi-beam or girder: 32,084 (58 percent)
Culvert: 8,203 (15 percent)
Slab: 5,449 (10 percent)
Box beam or girders (multiple): 3,555 (6 percent)
Tee beam: 3,009 (5 percent)

The Interstate System includes 22 suspension bridges.
« Last Edit: October 05, 2021, 12:31:41 PM by CtrlAltDel »
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Interstates clinched: 4, 57, 275 (IN-KY-OH), 465 (IN), 640 (TN), 985
State Interstates clinched: I-26 (TN), I-75 (GA), I-75 (KY), I-75 (TN), I-81 (WV), I-95 (NH)

JayhawkCO

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Re: Random facts about interstates and US routes
« Reply #19 on: October 05, 2021, 10:44:19 AM »

Isn’t US 101 considered a two digit US Route with the “10”  being an analog first digit?

Perhaps so.  I'll create another asterisk and edit my above post.

Chris

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Re: Random facts about interstates and US routes
« Reply #20 on: October 05, 2021, 12:08:16 PM »

I-70 does not in fact go to Baltimore, the signs are mistaken.  :bigass:
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Re: Random facts about interstates and US routes
« Reply #21 on: October 05, 2021, 12:17:33 PM »

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jmacswimmer

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Re: Random facts about interstates and US routes
« Reply #22 on: October 05, 2021, 12:23:52 PM »

I-70 does not in fact go to Baltimore, the signs are mistaken.  :bigass:
Neither does [insert examples of countless other routes that also don't serve the downtown of a control city they're signed for:bigass:
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SkyPesos

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Re: Random facts about interstates and US routes
« Reply #23 on: October 05, 2021, 12:27:17 PM »

I-70 does not in fact go to Baltimore, the signs are mistaken.  :bigass:
The whole “I-70 Baltimore”  thing is what had me thinking about the number of x5s each x0 interstate interchanges with lol, as I-70 is the only x0 (excluding I-30 as usual) that doesn’t meet I-95.

Related to that, of all the E-W interstates that go east of the Appalachians, I-66, I-70, I-84 and I-88 are the only ones that don't meet I-95. I-68 and I-86 are debatable, though I went with them having their eastern terminus in the Appalachians.
« Last Edit: October 05, 2021, 12:32:29 PM by SkyPesos »
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CtrlAltDel

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Re: Random facts about interstates and US routes
« Reply #24 on: October 05, 2021, 12:27:56 PM »

Post whatever random facts about interstates or US routes you have that you find interesting here. They can be as obvious, or as obscure as you like. I had plenty of facts over the past few weeks, but forgot about what all of them are about. Here's two I thought of in the shower today:

Of the x0 interstates (excluding wannabe I-30), I-10 interchanges with the most x5 interstates, while I-70 interchanges with the least. And none of them meet all 10 of them.
90: 5, 15, 25, 35, 55, 65, 75, 95 (8)
80: 5, 15, 25, 35, 55, 65, 75, 95 (8)
70: 15, 25, 35, 55, 65, 75 (6)
40: 15, 25, 35, 55, 65, 75, 85, 95 (8)
20: 35, 45, 55, 65, 75, 85, 95 (7)
10: 5, 15, 25, 35, 45, 55, 65, 75, 95 (9)

Speaking of I-70, it's the only x0 without a 5xx 3di, a common odd first digit for 3dis for some reason, and sometimes, the only odd first digit 3di an interstate has (516, 520, 530, 579, etc). Also, I-40 doesn't have a 3xx 3di, another common first digit.

I-45 is a wannabe too, in my opinion.
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Interstates clinched: 4, 57, 275 (IN-KY-OH), 465 (IN), 640 (TN), 985
State Interstates clinched: I-26 (TN), I-75 (GA), I-75 (KY), I-75 (TN), I-81 (WV), I-95 (NH)

 


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