What's a highway that spends (almost) its entire journey in a state concurrent with another highway.
I.E.
I-80 in Indiana is concurrent with I-94 and I-90
US 85 in New Mexico is concurrent with I-10 and I-25
I-25/US 87 share a hidden concurrency throughout Colorado.
Most of US 421 in Virginia is concurrent with US 23 and 58
Any others?
Ask Georgia where all US and Interstate (silent) are shared with a state route.
I-4 and FL 400 (I think most, if not all Florida interstates have State Route designations, though they may not necessarily be signed)
I-41 and US-41 in Wisconsin
Quote from: ozarkman417 on April 23, 2020, 12:43:46 AM
I-4 and FL 400 (I think most, if not all Florida interstates have State Route designations, though they may not necessarily be signed)
I-41 and US-41 in Wisconsin
Yeah Florida is an outlier though, all US Routes and Interstates have a State Road designations. One could say the same thing about US 1 and FL 5.
US 2 and US 141 on the section that is in the Florence, WI area.
I-894 and I-41.
Mike
I-86 entirely overlaps NY 17. 17 has standalone sections, but it carries all of 86.
MSR 110 is entirely overlapped with other routes such as US 36 and I-88.
The southern I-87 outside Raleigh is currently fully concurrent with US-64.
Quote from: Hwy 61 Revisited on April 23, 2020, 01:08:22 AM
I-86 entirely overlaps NY 17. 17 has standalone sections, but it carries all of 86.
AFAIK that won't be true once I-86 is finished to the Thruway... NY-17 exits off that freeway just before it gets to the Thruway.
Except for a couple of short sections, US 202 is concurrent with a handful of state routes in Maine, often several at a time.
US-223 in Ohio is completely concurrent with US-23. :-D
Quote from: GaryV on April 23, 2020, 07:36:07 AM
US-223 in Ohio is completely concurrent with US-23. :-D
And what a waste it is too. Ohio should terminate it at the state line and Michigan should be forced to make it a state highway.
US 23 in North Carolina is 100% concurrent with other routes.
Most of these other routes were added to existing US 23 (US 441, US 74, I-26)
I-39 in Illinois has US 51 along its entire length
I-587 with NY 28
I-393 with US 4 and US 202
WV 55 is concurrent with another route throughout its entire length except for a short segment at its western terminus between the WV 41 intersection and US 19.
US 60 and US 62 are completely concurrent in Illinois.
Every US route in Tennessee is concurrent with another highway, either an unsigned state route or an interstate.
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.
Starting across the Mississippi River, I-64 and US 40 run concurrently through St. Louis up to the former's terminus in Wentzville.
I-865 is entirely concurrent with US 52.
Until the new section gets signed, I-265 is entirely concurrent with IN 62
Is I-22 completely concurrent with US 78 through Mississippi and Alabama? Or were new alignments made that deviated from the existing 78 routing?
I-155 is concurrent with US-412 for it's entire length, which spans from I-55 in the Missouri Bootheel to US-51 in Tennessee.
I-99 is entirely concurrent with US-220 in PA. (220 has non-99 sections, but not vice versa).
Quote from: Ketchup99 on April 23, 2020, 02:45:43 PM
I-99 is entirely concurrent with US-220 in PA. (220 has non-99 sections, but not vice versa).
As is it with US 15 in New York.
Several shorter interstates in the west fit this:
- I-11 is entirely concurrent with US 93
- I-515 is entirely concurrent with US 93/95
- I-580 is entirely concurrent with US 395
- I-315 is entirely concurrent with US 89 and MT 3/200
- I-270 is entirely concurrent with US 36
I-82 also comes quite close - aside from two short sections in the Tri-Cities and Hermiston areas, the entire route is concurrent with US 395, US 12, and/or US 97.
Quote from: Big John on April 23, 2020, 12:36:35 AM
Ask Georgia where all US and Interstate (silent) are shared with a state route.
Same in Washington.
And don't get me started on the Oregon Route vs Oregon Highway craziness.
To add to the list, I-182 (WA), is completely concurrent with US 12
I-84 (OR) is nearly completely concurrent with US 30.
I-69 in Texas is currently fully concurrent with US-59.
I-69E in Texas is currently fully concurrent with US-77.
I-69C in Texas is currently fully concurrent with US-281.
I-69W in Texas is currently fully concurrent with US-59.
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.
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
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.
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
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
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
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?
Isn't I-2 fully concurrent with US-83?
Also...
I-394 in Minnesota is fully concurrent with US-12
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.
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.
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.
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.
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.
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
CA-51 in California is completely concurrent with Business 80.
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.
US-377 is entirely concurrent with SH-99 in Oklahoma.
the new I-285 in NC is entirely concurrent with US 52
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.
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.
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?
Quote from: plain on April 24, 2020, 11:27:24 PM
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?
Yep, so it wouldn't be only 2 of them.
https://www.google.com/maps/@37.8516211,-122.2993879,3a,15.1y,31.46h,88.53t/data=!3m6!1e1!3m4!1sQ2jb3ghr3Ab_Psopg8rlzQ!2e0!7i16384!8i8192!5m1!1e1
Two in Michigan:
I-194 (Battle Creek) is entirely concurrent with M-66.
BS I-75 (Bay City) is entirely concurrent with M-25.
Surprised no one has mentioned I-26 and US 23 in Tennessee yet.
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
I thought somebody said ARDOT took US 63 off I-555 and ran it concurrently with US 49.
Quote from: Road Hog on April 25, 2020, 01:21:13 AM
I thought somebody said ARDOT took US 63 off I-555 and ran it concurrently with US 49.
Maybe? I was going by the not always accurate Google Maps
Quote from: wanderer2575 on April 25, 2020, 12:00:01 AM
Two in Michigan:
I-194 (Battle Creek) is entirely concurrent with M-66.
BS I-75 (Bay City) is entirely concurrent with M-25.
Does it have to be signed to count? I-296 (unsigned) is entirely concurrent with US-131.
Quote from: GaryV on April 25, 2020, 08:07:43 AM
Quote from: wanderer2575 on April 25, 2020, 12:00:01 AM
Two in Michigan:
I-194 (Battle Creek) is entirely concurrent with M-66.
BS I-75 (Bay City) is entirely concurrent with M-25.
Does it have to be signed to count? I-296 (unsigned) is entirely concurrent with US-131.
Ooh, good one. Totally slipped my mind. I think it counts.
US 131 is entirely concurrent with IN 13 in Indiana.
Quote from: wanderer2575 on April 25, 2020, 09:36:25 AM
Quote from: GaryV on April 25, 2020, 08:07:43 AM
Quote from: wanderer2575 on April 25, 2020, 12:00:01 AM
Two in Michigan:
I-194 (Battle Creek) is entirely concurrent with M-66.
BS I-75 (Bay City) is entirely concurrent with M-25.
Does it have to be signed to count? I-296 (unsigned) is entirely concurrent with US-131.
Ooh, good one. Totally slipped my mind. I think it counts.
The northern end of I-296 isn't US 131 though.
Unsigned I-595 is concurrent with US-50 for its entire length in Maryland.
We've already mentioned all the Interstates in Georgia having unsigned state route numbers as well, so I won't go into that, but notably I-575 is also entirely concurrent with a regular signed route, GA 5.
The entire length of I-676 in PA is concurrent with US 30.
Quote from: Eth on April 25, 2020, 12:49:47 PM
We've already mentioned all the Interstates in Georgia having unsigned state route numbers as well, so I won't go into that, but notably I-575 is also entirely concurrent with a regular signed route, GA 5.
Similarly, with the exception of the last 3 miles, the entire length of I-985 is concurrent with US-23.
Quote from: sprjus4 on April 25, 2020, 01:07:40 PM
Quote from: Eth on April 25, 2020, 12:49:47 PM
We've already mentioned all the Interstates in Georgia having unsigned state route numbers as well, so I won't go into that, but notably I-575 is also entirely concurrent with a regular signed route, GA 5.
Similarly, with the exception of the last 3 miles, the entire length of I-985 is concurrent with US-23.
As previously mentioned, all US routes in Georgia are concurrent with a
signed state route, but there are also a handful of US routes that are entirely concurrent with the same SR across the whole state. Those are:
- US 11 and SR 58
- US 27 and SR 1
- US 84 and SR 38
- US 123 and SR 365
Quote from: US 89 on April 25, 2020, 02:30:05 PM
Quote from: sprjus4 on April 25, 2020, 01:07:40 PM
Quote from: Eth on April 25, 2020, 12:49:47 PM
We've already mentioned all the Interstates in Georgia having unsigned state route numbers as well, so I won't go into that, but notably I-575 is also entirely concurrent with a regular signed route, GA 5.
Similarly, with the exception of the last 3 miles, the entire length of I-985 is concurrent with US-23.
As previously mentioned, all US routes in Georgia are concurrent with a signed state route, but there are also a handful of US routes that are entirely concurrent with the same SR across the whole state. Those are:
- US 11 and SR 58
- US 27 and SR 1
- US 84 and SR 38
- US 123 and SR 365
i don't understand why GA does this. it just adds so many more signs that have to be manufactured and installed.
Quote from: fillup420 on April 25, 2020, 06:25:05 PM
Quote from: US 89 on April 25, 2020, 02:30:05 PM
Quote from: sprjus4 on April 25, 2020, 01:07:40 PM
Quote from: Eth on April 25, 2020, 12:49:47 PM
We've already mentioned all the Interstates in Georgia having unsigned state route numbers as well, so I won't go into that, but notably I-575 is also entirely concurrent with a regular signed route, GA 5.
Similarly, with the exception of the last 3 miles, the entire length of I-985 is concurrent with US-23.
As previously mentioned, all US routes in Georgia are concurrent with a signed state route, but there are also a handful of US routes that are entirely concurrent with the same SR across the whole state. Those are:
- US 11 and SR 58
- US 27 and SR 1
- US 84 and SR 38
- US 123 and SR 365
i don't understand why GA does this. it just adds so many more signs that have to be manufactured and installed.
I'm not sure if these routes are signed.
Quote from: Roadgeekteen on April 25, 2020, 06:27:57 PM
Quote from: fillup420 on April 25, 2020, 06:25:05 PM
Quote from: US 89 on April 25, 2020, 02:30:05 PM
Quote from: sprjus4 on April 25, 2020, 01:07:40 PM
Quote from: Eth on April 25, 2020, 12:49:47 PM
We've already mentioned all the Interstates in Georgia having unsigned state route numbers as well, so I won't go into that, but notably I-575 is also entirely concurrent with a regular signed route, GA 5.
Similarly, with the exception of the last 3 miles, the entire length of I-985 is concurrent with US-23.
As previously mentioned, all US routes in Georgia are concurrent with a signed state route, but there are also a handful of US routes that are entirely concurrent with the same SR across the whole state. Those are:
- US 11 and SR 58
- US 27 and SR 1
- US 84 and SR 38
- US 123 and SR 365
i don't understand why GA does this. it just adds so many more signs that have to be manufactured and installed.
I'm not sure if these routes are signed.
They are. GA's state route duplicates are all signed.
Quote from: 1 on April 25, 2020, 06:37:56 PM
They are. GA's state route duplicates are all signed.
Not everywhere. Many places -aren't- signed.
Quote from: ozarkman417 on April 23, 2020, 12:43:46 AM
I-41 and US-41 in Wisconsin
Also in Illinois.
I-41 is entirely dulpexed with I-94 in Illinois, too.
Mike
Quote from: mgk920 on April 25, 2020, 10:19:14 PM
Quote from: ozarkman417 on April 23, 2020, 12:43:46 AM
I-41 and US-41 in Wisconsin
Also in Illinois.
I-41 is entirely dulpexed with I-94 in Illinois, too.
Mike
I was about to comment that it ended at the state border, but it actually extends into Illinois for one mile. Why does it even go down there?
Quote from: Roadgeekteen on April 25, 2020, 10:21:27 PM
I was about to comment that it ended at the state border, but it actually extends into Illinois for one mile. Why does it even go down there?
So its ready for ISTHA to replace I-294 on the Tri-State, someday, a nod to to the nostalgia of the Tri-State's old designation of Toll US 41 /sarcasm
In all seriousness, I think the I-41/US 41 diplex continues until US 41 leaves the Freeway at the 2nd IL exit south of the Cheddar Curtain
In Louisiana US 63 is completely alongside US 167. Also in Baton Rouge, Business routes US 61 and US 190 are the exact same route.
iPhone
Despite Delaware being small, we have quite a few of these:
- US-202 spends 13 miles (of its 20 mile length) multiplexed - 2 miles with DE-141, 11 miles with I-95 (I feel it would make more sense to just truncate it to I-95)
- I-295 spends 4 miles (of its 6 mile length) multiplexed - with US-40 (keep in mind that the Delaware Memorial Bridge sits almost entirely within Delaware's border)
- DE-404 spends 23 miles (of its 35 mile length) multiplexed - 10 miles with DE-18, 13 miles with US-9 (I feel like it would make more sense to just truncate DE-18 to the west end of the DE-18 multiplex, since DE-18 just dies while running along with DE-404)
- Until the opening of the new highway last year, US-301 used to be multiplexed with other routes (DE-15, DE-71, DE-299, DE-896) for almost its entire then-14 mile length through Delaware (excluding a 1 mile segment of Middletown-Warwick Road between DE-71 and DE-299)
Quote from: ipeters61 on April 25, 2020, 11:48:19 PM
- US-202 spends 13 miles (of its 20 mile length) multiplexed - 2 miles with DE-141, 11 miles with I-95 (I feel it would make more sense to just truncate it to I-95)
Or extend it down DE 202, and then some, to 13.
Quote from: TheHighwayMan394 on April 24, 2020, 01:19:21 AM
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.
Yikes! How did I forget that?
Quote from: Hwy 61 Revisited on April 23, 2020, 01:08:22 AM
I-86 entirely overlaps NY 17. 17 has standalone sections, but it carries all of 86.
Not quite I think. I-86 in PA is only I-86 since PA 17 got decommissioned.
Quote from: Roadgeekteen on June 26, 2020, 12:45:41 AM
Quote from: Hwy 61 Revisited on April 23, 2020, 01:08:22 AM
I-86 entirely overlaps NY 17. 17 has standalone sections, but it carries all of 86.
Not quite I think. I-86 in PA is only I-86 since PA 17 got decommissioned.
I meant in New York.
Quote from: Hwy 61 Revisited on June 26, 2020, 01:02:33 AM
Quote from: Roadgeekteen on June 26, 2020, 12:45:41 AM
Quote from: Hwy 61 Revisited on April 23, 2020, 01:08:22 AM
I-86 entirely overlaps NY 17. 17 has standalone sections, but it carries all of 86.
Not quite I think. I-86 in PA is only I-86 since PA 17 got decommissioned.
I meant in New York.
Oh oops.
Except for a brief 1/2 mile connection to I-84, CT 15 is entirely concurrent with US 5 from the north end of the Wilbur Cross Parkway. (and until 1980, was concurrent with the former I-86 to Sturbridge, MA; as well as with US 6 to Manchester, and then with US 44 from Manchester to Willington).
US 202 is concurrent with other routes for about half its journey through the state. It is concurrent with US 6 as it enters the state, then joins a quadplex with I-84 and US 7, then leaves the quadplex with US 7. After it leaves the US 7 concurrency a mile north of the I-84 split (it used to remain concurrent until the US 7 Brookfield bypass was completed), it runs alone and rejoins US 7 at the north end of the bypass and runs concurrent again to New Milford. Then after an ever so brief concurrency with CT 67, it runs alone to Canton, then runs concurrent with other routes the rest of it's journey through CT (and to Westfield, MA); first with US 44, then with CT (and MA) 10.
US 6 is concurrent with I-84 for 23 miles of its journey through the state: 5 miles in Danbury, 4 miles from Newtown to Southbury, and 14 miles from Farmington to Manchester.
I don't know of any in Wisconsin besides the obvious (and infamous) one, which is US and I-41.
Quote from: thspfc on June 26, 2020, 04:56:27 PM
I don't know of any in Wisconsin besides the obvious (and infamous) one, which is US and I-41.
I-535
Quote from: thspfc on June 26, 2020, 04:56:27 PM
I don't know of any in Wisconsin besides the obvious (and infamous) one, which is US and I-41.
894 qualifies.
Quote from: 1 on June 26, 2020, 04:57:12 PM
Quote from: thspfc on June 26, 2020, 04:56:27 PM
I don't know of any in Wisconsin besides the obvious (and infamous) one, which is US and I-41.
I-535
Technically no, because a small stub continues to 5th Avenue after US 53 leaves.
Quote from: TheHighwayMan394 on June 26, 2020, 04:57:52 PM
Quote from: 1 on June 26, 2020, 04:57:12 PM
Quote from: thspfc on June 26, 2020, 04:56:27 PM
I don't know of any in Wisconsin besides the obvious (and infamous) one, which is US and I-41.
I-535
Technically no, because a small stub continues to 5th Avenue after US 53 leaves.
Kinda like the southernmost portion of I-135 in Kansas, the only mileage not overlapped with I-81.
Quote from: TheHighwayMan394 on June 26, 2020, 04:57:52 PM
Quote from: 1 on June 26, 2020, 04:57:12 PM
Quote from: thspfc on June 26, 2020, 04:56:27 PM
I don't know of any in Wisconsin besides the obvious (and infamous) one, which is US and I-41.
I-535
Technically no, because a small stub continues to 5th Avenue after US 53 leaves.
Quote
894 qualifies
Oh mah goodness, three replies in the first two minutes of the post, that's a record. Anyways, 535 does not technically count since there's a .1 mile segment of it at its south end that is not concurrent with any other highway. As for 894, yes, not sure how I missed that one. It actually qualifies three times over - I-41 and US-41 for its whole length, and US-45 for half and I-43 for the other half.
Quote from: kphoger on June 26, 2020, 05:03:04 PM
Kinda like the southernmost portion of I-135 in Kansas, the only mileage not overlapped with US I-81.
FTFY.
I-530 is entirely concurrent with US-65, until they officially extend to I-69 at Monticello, some decades into the future.
US 62/180 share a concurrency throughout New Mexico.
I-29 and US 81, with the exception of a short stretch, share a concurrency in ND.
US 2/141 in Wisconsin between the Michigan sections
I-190 (SD) and US 16
I-129 (NE-IA) with U.S. 20 in the Sioux City area
I-581 (VA) is concurrent with US 220 for its entire length
I-480 in Iowa is entirely concurrent with US 6
I-72 is entirely concurrent with US 36 in Missouri
I-88 is entirely concurrent with IL 110 in Illinois
I-277 is entirely concurrent with US 224 in Ohio
I-87 in North Carolina is currently entirely concurrent with US 64
I-26 in Tennessee is entirely concurrent with US 23
US 48 in Virginia is entirely concurrent with VA 55
I-393 in New Hampshire is entirely concurrent with US 4 and US 202
Quote from: sbeaver44 on July 02, 2020, 12:19:31 AM
I-88 is entirely concurrent with IL 110 in Illinois
IL-110 is a fake highway. :-(
Quote from: kphoger on July 02, 2020, 10:02:40 AM
Quote from: sbeaver44 on July 02, 2020, 12:19:31 AM
I-88 is entirely concurrent with IL 110 in Illinois
IL-110 is a fake highway. :-(
As is its MO-110 Counterpart
Tho if IL-336 were to be decomissioned, there actually would be independently signed segments of IL-110
IL and MO should have signed the CKC just with the CKC banner, similar to how the AotS is signed with the AotS banner in MO and IA (where it is signed at all). The 110 designation is overkill/unnecessary
Quote from: ilpt4u on July 02, 2020, 10:16:17 AM
Quote from: kphoger on July 02, 2020, 10:02:40 AM
Quote from: sbeaver44 on July 02, 2020, 12:19:31 AM
I-88 is entirely concurrent with IL 110 in Illinois
IL-110 is a fake highway. :-(
As is its MO-110 Counterpart
Tho if IL-336 were to be decomissioned, there actually would be independently signed segments of IL-110
IL and MO should have signed the CKC just with the CKC banner, similar to how the AotS is signed with the AotS banner in MO and IA (where it is signed at all). The 110 designation is overkill/unnecessary
At least MO-110 follows an actual corridor. But nobody in their right mind would use the Illinois portion to get from Hannibal to Chicago.
Quote from: kphoger on July 02, 2020, 10:34:59 AM
At least MO-110 follows an actual corridor. But nobody in their right mind would use the Illinois portion to get from Hannibal to Chicago.
I-55 would have to be in AWFUL shape, probably Closed, for much consideration to follow the CKC between Hannibal and Chicago instead of I-72 to I-55
I am not sure it still works this way, but in Texas and California both. There used to be state route numbers that identified the route; sort of an inventory number, that might but more often do not duplicate the signed route numbers.
The only time you would see these numbers is in DOT contracts and RFP's .
Surprised this one hasn't got mentioned yet: I-74 in Ohio is entirely concurrent with US 52.
Shocked no one has mentioned I-25/US87 in Colorado (unless I missed it).
Quote from: JayhawkCO on March 11, 2022, 03:22:01 PM
Shocked no one has mentioned I-25/US87 in Colorado (unless I missed it).
It's in the OP...
Quote from: Some one on April 23, 2020, 12:28:11 AM
I-25/US 87 share a hidden concurrency throughout Colorado.
Quote from: US 89 on March 11, 2022, 03:32:42 PM
Quote from: JayhawkCO on March 11, 2022, 03:22:01 PM
Shocked no one has mentioned I-25/US87 in Colorado (unless I missed it).
It's in the OP...
Quote from: Some one on April 23, 2020, 12:28:11 AM
I-25/US 87 share a hidden concurrency throughout Colorado.
Ha. That's why. Just looked at responses. Silly me. Then I'll submit WYO344 and WYO346 which are the two state highways that make up the tail ends of the US87 landslide area.
Quote from: bwana39 on July 03, 2020, 11:35:58 AM
I am not sure it still works this way, but in Texas and California both. There used to be state route numbers that identified the route; sort of an inventory number, that might but more often do not duplicate the signed route numbers.
The only time you would see these numbers is in DOT contracts and RFP's .
You might have in mind, for California, situations like legislatively defined state route 51 in Sacramento, which is signed (per that legislation) only as I-80 Business Loop.
More trivially, the entirety of Alaska's unsigned Interstate network is concurrent with signed state routes, though not necessarily the ones you might expect. A-1 is concurrent with part of AK 2, and part of AK 1 (which is in turn partially concurrent with part of AK 4). A-2 is concurrent with another part of AK 2. A-3 is concurrent with another part of AK 1. All of A-4 is concurrent with all of AK 3.
In addition to the full US/GA overlaps mentioned upthread, there are plenty of state routes in Georgia that spend their entire lives concurrent with other routes. Those include (and I'm probably missing a couple):
SR 3 - entirely concurrent with US 19 or US 41
SR 7 - entirely concurrent with US 41 or US 341
SR 8 - entirely concurrent with US 78 or US 29
SR 14 - entirely concurrent with US 29 or SR 154
SR 35 - entirely concurrent with US 319
SR 50 - entirely concurrent with US 82
SR 89 - entirely concurrent with US 441
SR 365 - entirely concurrent with I-985, US 23, or US 123
SR 515 - entirely concurrent with GA 5, GA 2/US 76, or GA 17
I don't know enough Georgia highway history to know for sure, but SR 9 and SR 13 may well be former examples as they look to be old alignments of US 19 and US 23 where they aren't still concurrent.
US 278 in Mississippi is concurrent with all of MS 6, US 61 from Clarksdale to Leland, and US 82 from Leland to the Mississippi River.
I-555 is concurrent with US 63 on its entire route.
Quote from: OCGuy81 on April 23, 2020, 01:32:25 PM
Is I-22 completely concurrent with US 78 through Mississippi and Alabama? Or were new alignments made that deviated from the existing 78 routing?
Not sure about Alabama, but it takes on US 78's route in Mississippi.
If we're allowed to jump into a time machine in this thread:
Washington's former numbering system (used until 1964) allowed for separate state highways to be co-signed with U.S. routes. For example, PSH 1 was entirely concurrent with US 99, while others had multiple state highways combined to form their routes.
Quote from: golden eagle on March 21, 2022, 09:07:14 AM
Quote from: OCGuy81 on April 23, 2020, 01:32:25 PM
Is I-22 completely concurrent with US 78 through Mississippi and Alabama? Or were new alignments made that deviated from the existing 78 routing?
Not sure about Alabama, but it takes on US 78's route in Mississippi.
The easternmost 10 miles of I-22 in the Birmingham area are not concurrent with US 78, which leaves the interstate for surface streets.
As mentioned at the end of Page 1: Oregon :)
It'd almost be easier to list the Routes that AREN'T concurrent with the Highways, such as OR 127 and 132.
I'd say I-110 in Texas, but it turns out it splits with US 54 as short as it is.
I-126 in South Carolina is entirely concurrent with US 76.
I-585 with US 176 in Spartanburg, SC.
I-185 in Greenville, SC used to be entirely concurrent with US 29 before the Southern Connector toll road opened in 2001.
Quote from: ilpt4u on April 25, 2020, 12:10:33 AM
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
No longer the case for I-555. Now US 63 follows US 49 south of Jonesboro and 555 is solo to Turrell.
I-9 is supposed to be hidden within CA-99 if it was approved.
Quote from: ozarkman417 on April 23, 2020, 12:43:46 AM
I-4 and FL 400 (I think most, if not all Florida interstates have State Route designations, though they may not necessarily be signed)
I-41 and US-41 in Wisconsin
And Illinois - (All of I-41 is concurrent with US 41 and I-94 in the state)
I-894 (Wisconsin) (entirely concurrent with I-41 and US 41 and various parts of US 45 and I-43, totaling the entire route.)
I-80 in Indiana (Parts of I-90 and I-94 totaling the entire route in the state.)
(
Mike
Quote from: Bruce on March 28, 2022, 04:34:54 PM
If we're allowed to jump into a time machine in this thread:
Washington's former numbering system (used until 1964) allowed for separate state highways to be co-signed with U.S. routes. For example, PSH 1 was entirely concurrent with US 99, while others had multiple state highways combined to form their routes.
Sounds like Oregon's current system, except their routes aren't signed.
Quote from: US 89 on March 12, 2022, 05:00:18 PM
SR 7 - entirely concurrent with US 41 or US 341
Technically no longer the case thanks to a recent rerouting of US 341 in Perry. GA 7 now exists on its own for about 3 miles (and is signed as such from I-75 exit 136).
Quote from: US 89 on March 12, 2022, 05:00:18 PMI don't know enough Georgia highway history to know for sure, but SR 9 and SR 13 may well be former examples as they look to be old alignments of US 19 and US 23 where they aren't still concurrent.
Yep. For about 20 years from the creation of US 123 in the mid-1940s until US 23 was rerouted off of Piedmont Road to the east (first to GA 42, then later to GA 155) in the mid-1960s, GA 13 was fully concurrent with one of those US routes. And GA 9 rode entirely along US 19 until the latter was moved over to GA 400 in the early '80s.
Has anyone mentioned I-26 in TN that is completely paired with US 23?