Interstate, US, State Routes all concurrent with eachother

[bassoon1986]

Louisiana has very few state highways concurrent with interstates. In Alexandria, the Pineville Expressway carries US 167 and LA 28 from Pineville over the Red River. Where the expressway meets I-49, one designation follows north and one follows south, but that's probably the closest you get to having all 3 together.

[xcellntbuy]

Although it does not happen too often in Georgia, most state numbers and some US numbers are hidden on the Interstates, but I have noticed that Interstate 20, US 278 and GA 12 are all signed on a section of Interstate 20 east of Atlanta.

[kinupanda]

Texas, thanks to the "useful" extension of SH 130:

• I-10/US 90/SH 130 (MM 581—603)
• I-410/US 281/SH 130 (MM 41—44)

[DandyDan]

Because of the Avenue of the Saints, Iowa has I-380, US 218 and Iowa 27 between Iowa City and Cedar Rapids and I-35, US 18, and Iowa 27 by Clear Lake.

LATE ADDITION: Also I-380, US 20 and Iowa 27 in the Waterloo area.

[akotchi]

A stretch, perhaps, but in Maryland, there is the unsigned I-595, with signed U.S. 50, U.S. 301 and Md. 2 between Parole and the end of I-595 at Rowe Blvd. (Annapolis area).

I do not think Md. 2 is signed even once in that stretch on a reassurance assembly.

It is signed at the points entering the freeway at either end, though I won't speak for the quality of that signing, but you might be right about the mainline.  I have not been there lately.  Perhaps having lived in that area for a time is why I know it exists.

[TheHighwayMan3561]

I-94/(MN 55)/(US 12)/(US 52)

Officially, MN 55 does not follow I-94.  There's a gap in MN 55.

When MNDot replaced the signs at the two interchanges between 55 and 94, MN 55 is now signed as joining I-94; either they erred, or they just haven't gotten around to filling the gap in the log yet. So I personally count it.

[theline]

I'm surprised no one has mentioned the I-465, I-74, US-40, US-36, US-31, SR-37, SR-67 concurrency on the south side of Indy. I know, there are no reassurance signs along the way, but this is clearly not a case where the DOT just assigns state numbers to the Interstates. The state and US highways are clearly signed as turning onto the Interstates. Example:


US-52 is also concurrent with all of these except for I-74.

[Eth]

Although it does not happen too often in Georgia, most state numbers and some US numbers are hidden on the Interstates, but I have noticed that Interstate 20, US 278 and GA 12 are all signed on a section of Interstate 20 east of Atlanta.

Though GA 12 is signed, it's really just the "tag-along" state route designation for US 278, so that probably doesn't really count.

Here's one that does count, though: I-516/US 17/US 80/GA 21. US 17 and US 80 bring along (not signed here) GA 25 and GA 26 as sidekicks, respectively, but GA 21 is a legitimate standalone route (continuing a whole half mile or so past I-516's south end!).

[Scott5114]

Happens twice thanks to Oklahoma 3: I-240/US-62/SH-3, I-40/US-270/SH-3. Also happens in Cleveland County: I-44/US-62/SH-37.

In Tulsa: I-444/US-64/US-75/SH-51, I-44/US-412/SH-66.

[NE2]

I-10/US 17/SR 228 and I-95/US 17/SR 228 are Florida's only (poorly) signed ones.

[DandyDan]

In western South Dakota, SD 34 overlaps with I-90 and US 14 NW of Sturgis, then going SE from Sturgis, SD 79 overlaps the 2 until the east end of Rapid City.

[froggie]

I-94/(MN 55)/(US 12)/(US 52)

Officially, MN 55 does not follow I-94.  There's a gap in MN 55.

When MNDot replaced the signs at the two interchanges between 55 and 94, MN 55 is now signed as joining I-94; either they erred, or they just haven't gotten around to filling the gap in the log yet. So I personally count it.

Signage coming off Olson Hwy has existed for a number of years now, yet MnDOT hasn't updated their log to move 55 to 94.  I've also noticed that, unless they updated signs over the winter, there is no indicating coming off Hiawatha that 55 goes anywhere.  Both suggest to me that, signage at Olson Hwy notwithstanding, they officially consider 55 a gapped route.

[jemacedo9]

I-99/US 220/PA 26 north of State College, and if I-99 ever gets extended north of I-80 and nothing else changes, there will be an I-99/US 220/PA 44 short concurrency.

[TheHighwayMan3561]

I-94/(MN 55)/(US 12)/(US 52)

Officially, MN 55 does not follow I-94.  There's a gap in MN 55.

When MNDot replaced the signs at the two interchanges between 55 and 94, MN 55 is now signed as joining I-94; either they erred, or they just haven't gotten around to filling the gap in the log yet. So I personally count it.

Signage coming off Olson Hwy has existed for a number of years now, yet MnDOT hasn't updated their log to move 55 to 94.  I've also noticed that, unless they updated signs over the winter, there is no indicating coming off Hiawatha that 55 goes anywhere.  Both suggest to me that, signage at Olson Hwy notwithstanding, they officially consider 55 a gapped route.

The signage at Hiawatha was replaced and updated in the last few months to show WB 55 joining 94. Unfortunately it was after the last GSV update in that area. I'll try to get a picture when I get a chance.

[tcorlandoinsavannah]

Although it does not happen too often in Georgia, most state numbers and some US numbers are hidden on the Interstates, but I have noticed that Interstate 20, US 278 and GA 12 are all signed on a section of Interstate 20 east of Atlanta.

Though GA 12 is signed, it's really just the "tag-along" state route designation for US 278, so that probably doesn't really count.

Here's one that does count, though: I-516/US 17/US 80/GA 21. US 17 and US 80 bring along (not signed here) GA 25 and GA 26 as sidekicks, respectively, but GA 21 is a legitimate standalone route (continuing a whole half mile or so past I-516's south end!).

Here's a section where GA 25 is signed, but US 17 is not along for the party yet (heading southbound).
I-516/US 80/GA 21/GA 25
And yes, both GA 25 and GA 21 are legitimate stand-alone routes (Admittedly, GA 25 is mostly concurrent with US 17, but it does have a stretch where it is independent).
Also, according to Wikipedia, the hidden state route for I-516 is GA 421.
GA 26 is pretty much unsigned in Savannah, but there is a signed (and very short) GA 26 CONN. GA 26 CONN and GA 26 CONN
On a side note, the hidden route for I-16 is 404.  Curiously, there is a GA 404 SPUR on some overhead signs, but it is an unsigned route. GA 404 SPUR

[vtk]

OH 37 / US 36 / Future I-73

[NE2]

Curiously, there is a GA 404 SPUR on some overhead signs, but it is an unsigned route.

What does this even mean?

[tcorlandoinsavannah]

Curiously, there is a GA 404 SPUR on some overhead signs, but it is an unsigned route.

What does this even mean?

I just think it's interesting, that's all.

[NE2]

Curiously, there is a GA 404 SPUR on some overhead signs, but it is an unsigned route.

What does this even mean?

I just think it's interesting, that's all.

I don't get what you're saying. It's on signs but it's unsigned?

[Revive 755]

At least three cases in Illinois:

* I-55/I-64/, US 40, and IL 3 through East St. Louis - though there is a seemingly dying plan to build a new alignment for IL 3 parallel to the interstates that would eliminate this one.

* I-255, US 50, and IL 3 in Columbia and Dupo

* I-72, US 36, and IL 110

[hbelkins]

OH 37 / US 36 / Future I-73

Shouldn't this be in Fictional Highways? 

[Beeper1]

In Maine there are two:

I-395/US-202/ME-15 just outside Bangor
I-295/US-1/ME-26 in Portland
 

[kphoger]

Curiously, there is a GA 404 SPUR on some overhead signs, but it is an unsigned route.

What does this even mean?

I just think it's interesting, that's all.

I don't get what you're saying. It's on signs but it's unsigned?

My wife just asked why I was laughing.

I love you, @NE2.

[NE2]

I love your wife, kphoger.

[kphoger]

You're not getting her Bud Light.