Interstates that continue as a state highway

[Bickendan]

I-29 used to continue as the very short MB 29 until MB 75 was switched to that border crossing, making it discontinuous from US 75.

[roadman65]

I-695 used to become MD 695, but now it does internally.

Technically the part over the former Key Bridge is not an interstate despite being signed as one.  It's unsigned MD 695 a long with part of I-695 leading to it that's not interstate.

[vdeane]

I-695 used to become MD 695, but now it does internally.

Technically the part over the former Key Bridge is not an interstate despite being signed as one.  It's unsigned MD 695 a long with part of I-695 leading to it that's not interstate.

They got AASHTO to approve making I-695 official there last year and it now shows as interstate on the NHS Viewer.

[hbelkins]

I-471 does not exist south of I-275. That highway is unsigned KY 471.

[bing101]

I-4 in Florida is technically State Route FL-400

https://en.wikipedia.org/wiki/Interstate_4

https://en.wikipedia.org/wiki/Interstate_80_in_California

I-80 from the West end of the Bay Bridge of San Francisco to the interchange with US-101 Bayshore Freeway is technically hidden California State Route 80.

However, federal records place the western terminus of I-80 at the western approach to the San Francisco–Oakland Bay Bridge, at the location of the Fremont Street offramp (previously known as the Terminal Separator Structure that once connected it to the Embarcadero Freeway. The federal and state governments disagree as to whether this westernmost segment of the signed Interstate, known as the San Francisco Skyway or Bayshore Viaduct, is actually part of the although it is consistently shown as I-80 on most maps of San Francisco.

[LilianaUwU]

I-80 from the West end of the Bay Bridge of San Francisco to the interchange with US-101 Bayshore Freeway is technically hidden California State Route 80.

FTFY

I-4 in Florida is technically State Route FL-400

https://wiki.aaroads.com/wiki/Interstate_4

https://wiki.aaroads.com/wiki/Interstate_80_in_California

also FTFY

[bugo]

AR 440 used to count, but it is in the process of becoming I-440. The 2025 ArDOT map shows it as I-440.

[english si]

I-530 in AR doesn't, because AR530 (which is future I-530) leaves an exit/2 miles before the terminius.

[FightingIrish]

I-35 ends in Duluth, MN, and becomes MN 61.

Of course, it used to be US 61.

[mgk920]

I-35 ends in Duluth, MN, and becomes MN 61.

Of course, it used to be US 61.

But it does not continue as 'MN 35' (same number).  That is just like how I-39 does not continue as 'WI 39', WI 39 is in a completely different part of Wisconsin.

Mike

[epzik8]

I-140 > NC 140

[mgk920]

I wouldn't think that this really counts, but long ago WI 57 was planned to be a northward extension of I-57 in Illinois (what was then proposed as 'I-57' in WI subsequently  morphed into what is now I-43).  I-57 would have ended in Green Bay and WI 57 would have continued on to Door County, WI, as it does now. Thus, when one thinks things through, WI 57 could be considered to be a direct northward continuation from I-57 in IL.

Mike

[JayhawkCO]

I-45 continues an the non-freeway TX-87 on Galveston Island.

The OP specified that the interstate should continue as a state highway that has the same number.

[roadman65]

Was it mentioned that I-255 becomes IL 255?

[Big John]

Was it mentioned that I-255 becomes IL 255?

Yes, post #4.

[roadman65]

Was it mentioned that I-255 becomes IL 255?

Yes, post #4.

I'm too busy now to do a check, but I kind of figured it might but put it to a question anyway.

Then you have the temporary situation of I-295 and NC 295 near Fayetteville.  Until the Fayetteville Outer Beltway is completed NC 295 will exist.

[Bickendan]

Specious and untrue example, but if one were to imagine I-82 continuing east on I-84 on a hidden overlap, them it'd qualify with OR 82

[Ted$8roadFan]

I-495 continues as MA-25 from Wareham to the Bourne Bridge.

[english si]

Then you have the temporary situation of I-295 and NC 295 near Fayetteville.  Until the Fayetteville Outer Beltway is completed NC 295 will exist.

But they don't actually continue onto each other, as the gap in the Outer Beltway is in the middle.

It's like saying the same with I-/NC74. It's just not quite what the question was.

Nor does

I-495 continues as MA-25 from Wareham to the Bourne Bridge.

give an answer to OP's question

I was trying to compile a list of any Interstate that ends, but continues as a state highway with the same number.

Anyway, here's the list we have

I-110 in California continues as CA-110

I-15 in California continues as CA-15

I-210 in California continues as CA-210

I-759 in Alabama continues as AL-759

I-794 in Wisconsin continues as WI-794

Many of the 3dis in New York qualify. Examples include NY 390, NY 590, and NY 787.

You left out NY 590, NY 690, NY 481, NY 890, and NY 878.

I-238 - CA 238 

I-A1 continues as AK1 at its western end.
I-A2 continues as AK2 at both ends.

I-PR2 continues as PR2.

I-540 in North Carolina continues as NC 540; I-885 continues as NC 885; I-140 continues as NC 140.

I-381 continues as VA 381
I-195 continues as VA 195
I-295 continues as DC 295

I-255 in Illinois continues as IL 255.

I-471 does not exist south of I-275. That highway is unsigned KY 471.

Not State (or DC/PR) routes:

I-95 continues across the northern border as New Brusnwick 95

Not sure if this would count, but Interstate 41 continues as US-41 in both directions.

Though US-41 is signed with Interstate 41 throughout....

Not quite the same, but I-215 continues as Clark County Road 215 in NV.

In a similar vein to I-41 and US41, I-74 continues as US74 at its easternmost western end, and at its easternmost and second easternmost eastern ends.

And some former/soon-to-be-former ones

I-265 in Indiana USED to continue east of I-65 as IN 265, which is resigned as I-265 in 2023.

but is still signed as IN 265.

I-695 used to become MD 695, but now it does internally.

Technically the part over the former Key Bridge is not an interstate despite being signed as one.  It's unsigned MD 695 a long with part of I-695 leading to it that's not interstate.

They got AASHTO to approve making I-695 official there last year and it now shows as interstate on the NHS Viewer.

AR 440 used to count, but it is in the process of becoming I-440. The 2025 ArDOT map shows it as I-440.

[english si]

And in numerical order:

I-15 continues as CA 15
I-41 continues as US 41 (at both ends)
I-74 continues as US 74
I-95 continues as NB 95
I-110 continues as CA 110
I-140 continues as NC 140
I-195 continues as VA 195
I-210 continues as CA 210
I-215 continues as Clark County 215
I-238 continues as CA 238
I-255 continues as IL 255
I-295 continues as DC 295
I-381 continues as VA 381
I-390 continues as NY 390
I-471 continues as KY 471 (unsigned)
I-481 continues as NY 481
I-540 continues as NC 540
I-590 continues as NY 590
I-690 continues as NY 690
I-759 continues as AL 759
I-787 continues as NY 787
I-794 continues as WI 794
I-878 continues as NY 878
I-885 continues as NC 885
I-890 continues as NY 890
I-A1 continues as AK 1
I-A2 continues as AK 2 (at both ends)
I-PR2 continues as PR 2

[hotdogPi]

A TravelMapping query of "routes with the same number that terminate at each other, one of which is an Interstate" should get a definitive list.

[roadman65]

[ /quote] But they don't actually continue onto each other, as the gap in the Outer Beltway is in the middle.

It's like saying the same with I-/NC74. It's just not quite what the question was.  [/quote]



Isn't the gap at the south end?   Between Parkton and I-95 at the Robeson County Line just south of I-95 Business?

I remember a friend of mine clinched that and he said he had to use back roads between I-95 and Parkton to be able to clinch that route in its entirety.

[english si]

Isn't the gap at the south end?  Between Parkton and I-95 at the Robeson County Line just south of I-95 Business?

NC295 runs between exit 1 (the incomplete southern I-95 junction) and exit 7 (Camden Road)
The gap is between exit 7 (Camden Road) and 12 (US401)
I-295 runs between exit 12 (US401) and exit 34 (the incomplete northern I-95 junction)

[kphoger]

A 'US' highway is a state highway.

If we're going that route [pun not intended], then so is an Interstate highway.

"...with the same number."

(same number)

The OP specified that the interstate should continue as a state highway that has the same number.

You know, this is why people should make the thread topic actually match what they intend.  All the topic actually says is 'continue as a state highway'.

[vdeane]

And some former/soon-to-be-former ones

NY 481 should probably be considered "soon to be former".

But they don't actually continue onto each other, as the gap in the Outer Beltway is in the middle.

It's like saying the same with I-/NC74. It's just not quite what the question was. 

Isn't the gap at the south end?   Between Parkton and I-95 at the Robeson County Line just south of I-95 Business?

I remember a friend of mine clinched that and he said he had to use back roads between I-95 and Parkton to be able to clinch that route in its entirety.

Part of the southern section may have opened prior to the link to I-95.  That might be what you're remembering.

You know, this is why people should make the thread topic actually match what they intend.  All the topic actually says is 'continue as a state highway'.

Of course, people could also read the OP (and ideally the rest of the thread, we're only on page 2 after all) before replying, especially since some things are hard to boil down into something short enough to make into a fully clarifying thread title.