Interstates and U.S. routes entering Canada and Mexico because 'Murrica

[bandit957]

Has there ever been an instance where a U.S. route or Interstate has crossed the border and maintained its designation there? I don't mean just the same number. I mean the same system - for instance, remaining a U.S. route on Canadian or Mexican soil.

I thought someone said US 2 used to be designated through Canada, though I don't remember ever seeing this on any map.

Conversely, have any other countries' route systems entered the U.S.?

[cbeach40]

I thought someone said US 2 used to be designated through Canada, though I don't remember ever seeing this on any map.

That's because whomever said that had no clue about what they were saying.

[US 41]

The closest thing to this is MX 57 turning into US 57, US 75 turning into MB 75, US 67 turning into CHIH 67,US 83 turning into MB 83, I-95 turning into NB 95, and US 97 turning into BC 97. I probably missed a few others too. Why would any US highways be signed in other countries though? 

[empirestate]

Why would any US highways be signed in other countries though? 

Same reason NY 17 is signed in Pennsylvania.

[SignGeek101]

I thought someone said US 2 used to be designated through Canada, though I don't remember ever seeing this on any map.

http://goo.gl/maps/qtmkJ 

Yes, I know it's a trunk route, and not a US highway

Does QC 247 Count? Also named as Canusa Street or something like that.

http://goo.gl/maps/VyhHh

http://en.wikipedia.org/wiki/Canusa_Street

[US 41]

Why would any US highways be signed in other countries though? 

Same reason NY 17 is signed in Pennsylvania.

Well, you got me there.    This might be a dumb question, but out of curiosity does NY take care of that tiny part of NY 17 that enters Pennsylvania or does PA take care of it? The pavement doesn't appear to change at either one of the state borders.

[NE2]

I thought someone said US 2 used to be designated through Canada, though I don't remember ever seeing this on any map.

http://groups.google.com/d/msg/misc.transport.road/Tn_Zz-E9C7o/2vFGXKVwEnYJ

[mwb1848]

TxDOT is beginning work on a westward extension of Loop 375 around Downtown El Paso. Because of VERY TIGHT right-of-way constraints, plans call for the elevated structure to be built in the no-mans-land between the Border Wall and the northern bank of the Rio Grande. So, kinda. 

[hotdogPi]

Does QC 247 enter Vermont?

[SignGeek101]

Why would any US highways be signed in other countries though? 

Same reason NY 17 is signed in Pennsylvania.

SK 17 is signed in Alberta.

http://goo.gl/maps/fS82q

Why would any US highways be signed in other countries though? 

US 37 is in Canada: http://goo.gl/maps/PXT2L

[hotdogPi]

Why would any US highways be signed in other countries though? 

US 37 is in Canada: http://goo.gl/maps/PXT2L

That should be "TO NY 37".

[briantroutman]

This might be a dumb question, but out of curiosity does NY take care of that tiny part of NY 17 that enters Pennsylvania or does PA take care of it? The pavement doesn't appear to change at either one of the state borders.

The tiny stretch of NY 17/Future I-86 that crosses the PA state line near Sayre was constructed by NYSDOT, is maintained by them, and is patrolled by NY State Police. For all intents and purposes, it functions like a tiny enclave of NY within PA borders.

[SignGeek101]

Why would any US highways be signed in other countries though? 

US 37 is in Canada: http://goo.gl/maps/PXT2L

That should be "TO NY 37".

I know, I was just having fun. That error has been there for years. Not to mention, NY 37 goes East / West.

Does QC 247 enter Vermont?

There are American signs there: http://goo.gl/maps/kQ54D

Voting for US Senator? http://goo.gl/maps/Rk23P

[NE2]

The tiny stretch of NY 17/Future I-86 that crosses the PA state line near Sayre was constructed by NYSDOT, is maintained by them, and is patrolled by NY State Police. For all intents and purposes, it functions like a tiny enclave of NY within PA borders.

On the other hand, it was assigned a legislative route number by Pennsylvania. See page 139: ftp://ftp.dot.state.pa.us/public/Bureaus/BOMO/RM/RITS/LR%20Books/Bradford.pdf

[bandit957]

Why would any US highways be signed in other countries though? 

Because there's a few places where a Kentucky state route enters a neighboring state. For instance, KY 17 goes a little bit into Ohio to include the Suspension Bridge.

[The High Plains Traveler]

The closest thing to this is MX 57 turning into US 57, US 75 turning into MB 75, US 67 turning into CHIH 67,US 83 turning into MB 83, I-95 turning into NB 95, and US 97 turning into BC 97. I probably missed a few others too. Why would any US highways be signed in other countries though? 

Since the closure of the Noyes/Emerson border crossing between the U.S. and Canada, U.S. 75 dead ends and I-29 becomes MB-75. There was a MB-29 (very short) between I-29 at the border and the intersection with the road formerly posted as MB-75 that came through Noyes and Emerson, but no longer.

[Duke87]

Why would any US highways be signed in other countries though? 

Same reason NY 17 is signed in Pennsylvania.

NY 17 briefly dips into PA simply because it was easier to build the road that way than to keep it all in New York. There are other examples of state highways doing this - see NY 120A in Connecticut, ME 113 in New Hampshire, AR 43 in Oklahoma.

But between two states this sort of thing can be arranged since there are no customs to worry about. If a similar dilemma were to arise involving an international border, you can bet that they would spend the extra money to keep the road on one side of the border since otherwise you'd have a customs problem.

That said, there ARE examples of minor streets dancing with the border and this producing some interesting consequences, such as the aforementioned Rue Canusa where the road is in Quebec but houses along it are in Vermont.

There's also the aptly named "Border Road" directly east of the northern end of I-15, which runs right down the middle of the no-touching zone and has streets ending on it from both Alberta and Montana. No customs booths along it but I'm sure border patrol keeps an eye on it and anyone who doesn't leave to the same side they came from will get nabbed. 

[jp the roadgeek]

BBefore Québec renumbered them, Autoroutes 15 and 55 were numbered 9 and 5, respectively, to match the US route at the crossing.  Also looks like Route 235 keeps its same number in Québec and Vermont, as do routes 139, 243, 147 (all 1/8 mi. in VT), and 141 (about a 1/2 mi. in VT)

[Bickendan]

Why would any US highways be signed in other countries though? 

Same reason NY 17 is signed in Pennsylvania.

SK 17 is signed in Alberta.

http://goo.gl/maps/fS82q

Not quite. It's AB 17 in Alberta and SK 17 in Saskatchewan. http://en.m.wikipedia.org/wiki/Highway_17_%28Alberta%E2%80%93Saskatchewan%29

[national highway 1]

The closest thing to this is MX 57 turning into US 57, US 75 turning into MB 75, US 67 turning into CHIH 67,US 83 turning into MB 83, I-95 turning into NB 95, and US 97 turning into BC 97. I probably missed a few others too. Why would any US highways be signed in other countries though? 

BC 93 is a northern continuation of US 93, BC 95 is a continuation of US 95 and BC 395 is a continuation of US 395. BC 99 is a remnant continuation of the now decommissioned US 99.

[NE2]

TCH 1 is a continuation of MEX 1.

[national highway 1]

TCH 1 is a continuation of MEX 1.

what

[codyg1985]

ON 61 is a continuation of what used to be US 61 but is now MN 61.

[empirestate]

Has there ever been an instance where a U.S. route or Interstate has crossed the border and maintained its designation there? I don't mean just the same number. I mean the same system - for instance, remaining a U.S. route on Canadian or Mexican soil.

The closest thing to this is MX 57 turning into US 57, US 75 turning into MB 75, US 67 turning into CHIH 67,US 83 turning into MB 83, I-95 turning into NB 95, and US 97 turning into BC 97. I probably missed a few others too. Why would any US highways be signed in other countries though? 

BC 93 is a northern continuation of US 93, BC 95 is a continuation of US 95 and BC 395 is a continuation of US 395. BC 99 is a remnant continuation of the now decommissioned US 99.

ON 61 is a continuation of what used to be US 61 but is now MN 61.

So...that would be a "no", then?

[CNGL-Leudimin]

There's a recently completed (last year or two years ago, I don't recall exactly when) German road that passes through Swiss territory while retaining its German number.

Does QC 247 Count? Also named as Canusa Street or something like that.

http://goo.gl/maps/VyhHh

http://en.wikipedia.org/wiki/Canusa_Street

Too bad the country is not displayed anymore. But https://www.google.es/maps/@45.00584,-72.137515,3a,75y,105.48h,89.41t/data=!3m4!1e1!3m2!1sPsUAhHxH9uk1LsAi96yqEg!2e0 .