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Highways that are entirely concurrent with another highway in a state

Started by Some one, April 23, 2020, 12:28:11 AM

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cwf1701

Formerly, US-33 was concurrent with US-31 in Michigan to the northern end of US-33 (in Benton Harbor). this was changed when I-94 and I-196 opened and US-33 was put on the former route of US-31 in Benton Harbor.


ilpt4u

Quote from: OCGuy81 on April 23, 2020, 10:16:40 AM
I-39 in Illinois has US 51 along its entire length
Not quite. US 51 exits I-39/90 at the South Beloit exit/Gardner St in IL.

That said, I-39 is still multiplexed with I-90 for the farthest north mile of I-39 in IL, so I-39 is 100% multiplexed within IL, almost all with US 51 and I-90 for the only bit that is not US 51

US 60 and US 62 are entirely concurrent in IL, from the Ohio River Bridge to the Mississippi River Bridge at the Southern tip of the state

bing101

US-60 and US-70 were at one time entirely concurrent in California until the 1964 renumbering and became I-10.
I-305's entire route is concurrent with the Western Terminus of US-50 from the I-80 interchange in West Sacramento to CA-51/ CA-99 @ US-50 interchange in Sacramento.

mgk920

Quote from: Henry on April 23, 2020, 12:33:01 PM
Quote from: mgk920 on April 23, 2020, 01:06:50 AMI-894 and I-41.
Yeah, on the western half. The eastern half of I-894 is concurrent with I-43.

I-41 and 894 are combined on I-894's entire length, the east-west part with I-43 is one of the only two triplexes on the I-system (I-39/90/94 in WI), along with one of the only two wrong-way number pairings on the I-system (I-77 and I-81 in VA).

Mike

ilpt4u

Quote from: mgk920 on April 23, 2020, 11:38:13 PM
Quote from: Henry on April 23, 2020, 12:33:01 PM
Quote from: mgk920 on April 23, 2020, 01:06:50 AMI-894 and I-41.
Yeah, on the western half. The eastern half of I-894 is concurrent with I-43.

I-41 and 894 are combined on I-894's entire length, the east-west part with I-43 is one of the only two triplexes on the I-system (I-39/90/94 in WI), along with one of the only two wrong-way number pairings on the I-system (I-77 and I-81 in VA).

Mike
The Poplar Street Bridge across the Mississippi in St Louis used to be an Interstate triplex, but then the Stan Musial Bridge happened and I-70 moved off the PSB to the Stan Span

If IL did not cancel the US 51 to I-39 upgrade from Bloomington to Decatur, there would be an Interstate triplex around Bloomington

A 3rd Interstate triplex is coming soon...somewhere on the Indy Beltway will have I-69, I-74, and I-465

sprjus4

Quote from: mgk920 on April 23, 2020, 11:38:13 PM
along with one of the only two wrong-way number pairings on the I-system (I-77 and I-81 in VA).
I-73 and I-85 near Greensboro, NC come close, though run on separate carriageways.

https://www.google.com/maps/@36.0058658,-79.8404523,3617m/data=!3m1!1e3!5m1!1e1

ilpt4u

Speaking of the Indy Beltway...Is/are there any segment(s) of I-465 that do(es) not have at least one concurrency with I-74 and/or the various US and IN State Highways that now travel on the Beltway instead of thru Indy?

DJ Particle

Isn't I-2 fully concurrent with US-83?

Also...
I-394 in Minnesota is fully concurrent with US-12

Roadsguy

Apparently AASHTO approved I-74 in VA to be signed from the NC state line to I-81, but VDOT has yet to post it. (Does I-74 exist internally at all yet?) This unsigned section is entirely concurrent with I-77, and if I-74 is ever completed in Virginia (i.e. if WV ever builds their section, since VDOT has literally nothing to do to complete I-74 besides add signs), then I-77 and I-74 will be concurrent with each other for their entire run in VA, the first concurrency of its kind in the country to my knowledge.
Mileage-based exit numbering implies the existence of mileage-cringe exit numbering.

TheHighwayMan3561

Quote from: DJ Particle on April 24, 2020, 12:43:40 AM
I-394 in Minnesota is fully concurrent with US-12

Not quite. The last mile from 94 to downtown is solo.

Although in crazy reverse application, it makes me realize 94 is fully concurrent for the entirety of Minnesota. 52 from ND to St. Paul, 12 the rest of the way to Wisconsin.
self-certified as the dumbest person on this board for 5 years running

sprjus4

Quote from: ilpt4u on April 24, 2020, 12:33:47 AM
Speaking of the Indy Beltway...Is/are there any segment(s) of I-465 that do(es) not have at least one concurrency with I-74 and/or the various US and IN State Highways that now travel on the Beltway instead of thru Indy?
I-465 between I-74 (west) and I-865 isn't concurrent with any other highways, about 9 miles.

The rest of the beltway is concurrent with at least one other highway.

sprjus4

Quote from: Roadsguy on April 24, 2020, 01:13:53 AM
Apparently AASHTO approved I-74 in VA to be signed from the NC state line to I-81, but VDOT has yet to post it. (Does I-74 exist internally at all yet?) This unsigned section is entirely concurrent with I-77, and if I-74 is ever completed in Virginia (i.e. if WV ever builds their section, since VDOT has literally nothing to do to complete I-74 besides add signs), then I-77 and I-74 will be concurrent with each other for their entire run in VA, the first concurrency of its kind in the country to my knowledge.
Virginia hasn't posted it, though North Carolina has proactively posted it along I-77 up to the state line, like it will ever actually go anywhere. VDOT could easily do the same thing through its entire run, just knocking at West Virginia's door, though wouldn't serve any utility.

This would also create a triplex situation with the existing I-77 / I-81 overlap, it would be an I-74 / I-77 / I-81 overlap.

DandyDan

I-180 in Nebraska is entirely concurrent with US 34.

I-380 in Iowa is mostly concurrent with Iowa 27, except for its northernmost section, which is concurrent with US 218. It also overlaps US 20 near Waterloo.

I-129 overlaps both US 20 and US 75 in Iowa and Nebraska.
MORE FUN THAN HUMANLY THOUGHT POSSIBLE

ilpt4u

Quote from: sprjus4 on April 24, 2020, 02:30:41 AM
Quote from: ilpt4u on April 24, 2020, 12:33:47 AM
Speaking of the Indy Beltway...Is/are there any segment(s) of I-465 that do(es) not have at least one concurrency with I-74 and/or the various US and IN State Highways that now travel on the Beltway instead of thru Indy?
I-465 between I-74 (west) and I-865 isn't concurrent with any other highways, about 9 miles.

The rest of the beltway is concurrent with at least one other highway.
I take it US 31 officially is routed on the East side of I-465, not the West side, then. I believe I-69 is also expected to be routed along the South and East sides...so that bit of 465 will exclusively be 465 for the foreseeable future

bing101

CA-51 in California is completely concurrent with Business 80.

NWI_Irish96

Quote from: ilpt4u on April 24, 2020, 07:58:20 AM
Quote from: sprjus4 on April 24, 2020, 02:30:41 AM
Quote from: ilpt4u on April 24, 2020, 12:33:47 AM
Speaking of the Indy Beltway...Is/are there any segment(s) of I-465 that do(es) not have at least one concurrency with I-74 and/or the various US and IN State Highways that now travel on the Beltway instead of thru Indy?
I-465 between I-74 (west) and I-865 isn't concurrent with any other highways, about 9 miles.

The rest of the beltway is concurrent with at least one other highway.
I take it US 31 officially is routed on the East side of I-465, not the West side, then. I believe I-69 is also expected to be routed along the South and East sides...so that bit of 465 will exclusively be 465 for the foreseeable future

The 465 loop is not symmetric with regard to the center of the city.  The NW section is the farthest away from the city's center, and as a result it's not the shortest way around for any of the various US highways that are routed along 465.  US 36 comes the closest, but it's still about 4 miles shorter to go around the south side.
Indiana: counties 100%, highways 100%
Illinois: counties 100%, highways 61%
Michigan: counties 100%, highways 56%
Wisconsin: counties 86%, highways 23%

Scott5114

uncontrollable freak sardine salad chef

fillup420


Road Hog

US 59 is completely concurrent with other highways in Arkansas: with US 270 from the Oklahoma line to DeQueen and with US 71 south to I-30 in Texarkana.

Speaking of which, the current stub of I-369 in Texarkana is concurrent with US 59.

ozarkman417

Not sure how I missed this one-

I-49 is entirely concurrent with US-71 in Missouri... for now.

I-72 is fully concurrent with MO 110 and US-36 near Hannibal.

plain

Quote from: sprjus4 on April 24, 2020, 12:29:41 AM
Quote from: mgk920 on April 23, 2020, 11:38:13 PM
along with one of the only two wrong-way number pairings on the I-system (I-77 and I-81 in VA).
I-73 and I-85 near Greensboro, NC come close, though run on separate carriageways.

https://www.google.com/maps/@36.0058658,-79.8404523,3617m/data=!3m1!1e3!5m1!1e1

Isn't I-80 & I-580 in CA a wrong-way concurrency also?
Newark born, Richmond bred

sprjus4


wanderer2575

Two in Michigan:

I-194 (Battle Creek) is entirely concurrent with M-66.

BS I-75 (Bay City) is entirely concurrent with M-25.

mrcmc888

Surprised no one has mentioned I-26 and US 23 in Tennessee yet.

ilpt4u

Also surprised no one has mentioned KY's I-265 being fully concurrent with KY 841

Gonna add Arkansas's I-555 is fully concurrent with US 63

The so-called "CKC"  Chicago-Kansas City Expressway designation of IL/MO 110 is a fully concurrent designation in both states, of various other routes. IL 336 is also (currently) fully concurrent with IL 110. If IL 336 is never built Macomb to Peoria which would be a uniquely designated section, IL 336 should be deleted IMHO

Also because of the IL 110 ridiculousness, I-172 and I-88 in IL are both fully concurrent with IL 110



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