Highway numbers crossing borders

[NE2]

NY 5/PA 5
I-95/NB 95 (the only example I know of for an interstate keeping its number across an international boundary)

I-29 becomes MB 29, but the latter is unsigned.

[Duke87]

He probably meant 120A.

No, both 120/120 and 120A/120A were posted. As for CT 120A, it is somewhat unrecognized, as it is NYSDOT maintaned and the only CT 120A shields, some of which have been called erroneous, are posted at the Merrit Parkway offramps.

Here's one on Google Street View (15 SB at 120 NB): http://g.co/maps/wyzc

I do believe that is the only CT 120A shield out there. Signs on the parkway proper use the New York shield, and there are one or two correct NY 120A shields within Connecticut, on the CT side of the portion that straddles the state line. There are no NY 120A shields on the parts completely within Connecticut (the turn onto/off of Gateway Lane is unsigned southbound and signed as TO NY 120/I-684 northbound). There are, however, reference markers.

Also, actual picture:

[Anthony_JK]

Only example I know is LA/TX 12 between Vidor, TX and Dequincy, LA.


Anthony

[Beeper1]

Every state route in Connecticut that ends at the state line is consistently numbered with the state route on the other side, if there is one. This is intentional.

The same can be said about Massachusetts and Rhode Island.

Except the rare case where the road is not a numbered route at all on the other side of the border.   MA 31 is not numbered when it enters CT.  CT 272 is not numbered in MA.  NH 123 is not numbered in MA.   But generally, in the northeast there is good concurrence over state lines.    The largest/most confusing exception is where VT 9 becomes NY 7.

[NE2]

MA 7A becomes unsigned SR 832 in Connecticut.

[Bickendan]

WA/OR 433 (signed as WA 433 on the Oregon side of the bridge).
OR/WA 35 (unofficial, as OR 35 doesn't cross onto the Hood River Bridge and was proposed by WSDOT for a better crossing over the Columbia).

[NE2]

WA/OR 433 (signed as WA 433 on the Oregon side of the bridge).

http://www.oregon.gov/ODOT/HWY/TRAFFIC-ROADWAY/docs/pdf/Descriptions_of_US_and_Oregon_Routes.pdf doesn't list OR 433.

[Bickendan]

ODOT doesn't recognize 433. It's a Washington route the entire length of the Lewis and Clark Bridge.

[NE2]

ODOT treats their portion as a ramp. So they sign it as a ramp to SR 433. Nothing strange about that.

[xonhulu]

ODOT doesn't recognize 433. It's a Washington route the entire length of the Lewis and Clark Bridge.

It's odd they don't, since on the other end of the state ODOT does sign the extremely short OR 52 to meet its Idaho counterpart.  But that might just be because that route was originally on the state route system as OR 90 and so has always been signed as something.  Plus it's a little longer than the L & C Bridge stub.

Honestly, WA 433 is pretty pointless now, too, since it was curtailed to the Industrial Way intersection just north of the bridge when WA 432 was moved to Industrial Way in the early '90's. 

[national highway 1]

US 57 & MX 57, Eagle Pass TX

[agentsteel53]

US 57 & MX 57, Eagle Pass TX

that's about the only example I know of where the US changed a route number (it used to be Texas state route something-or-another) to match that of another country.

[NE2]

US 57 & MX 57, Eagle Pass TX

that's about the only example I know of where the US changed a route number (it used to be Texas state route something-or-another) to match that of another country.

Texas actually changed the number to 57 (I think it had been 78) before it became a U.S. Highway.

[OracleUsr]

Right off the top of my head:

NC/VA 87
NC/VA 14
NC/SC 18
NC/SC 49
NC/SC 51
SC/GA/NC 28
NC/SC 107

[1995hoo]

VA/NC-8
VA/NC-16
VA/NC-32
VA/NC-35
VA/NC-46
VA/NC/SC-49
VA/NC-62
VA/NC-86
VA/NC-87
VA/NC-89
VA/NC-96
VA/NC-103
VA/NC-119
VA/NC-168
VA/NC-186

NC-615 becomes a Virginia secondary route numbered 615.

[Bickendan]

ODOT treats their portion as a ramp. So they sign it as a ramp to SR 433. Nothing strange about that.

It's not signed as 'To SR 433' on the Oregon side; it's outright signed as 'North SR 433'.

[huskeroadgeek]

In Nebraska, there are 28 state routes that cross into another state. 12 of them keep the same number in the next state: NE/IA 2, NE/IA 370, NE/IA 92(also concurrent with US 275), NE/SD 71(NE 2 ends at the SD border), NE/WY 92, NE/KS 99, NE/KS 15, NE/KS 14, NE/KS 25, NE/KS 27, NE/CO 23, and NE/CO 71.

[deathtopumpkins]

NC-615 becomes a Virginia secondary route numbered 615.

That was the case before Princess Anne County became part of the independent city of Virginia Beach, which maintains its own roads and thus does not number secondary routes. There is one erroneous VA 615 shield though I believe.

[agentsteel53]

NC-615 becomes a Virginia secondary route numbered 615.

this seems more like NC adopting a Virginia-style number.  Virginia has 6xx for its secondaries, while NC has only four 6xx routes, with no discernible pattern to their numbering.

[corco]

ODOT treats their portion as a ramp. So they sign it as a ramp to SR 433. Nothing strange about that.

It's not signed as 'To SR 433' on the Oregon side; it's outright signed as 'North SR 433'.

Yes. There is only one 433 shield in Oregon, but it's definitely a 433 shield and it's definitely in Oregon



It should be noted that the junction US-30 signage on southbound 433 is definitely ODOT standard


I'm unsure whose jurisdiction it falls into- the only real indication that it's State Route 433 is that lone shield- WSDOT ends the mileposting in the middle of the bridge. I've always considered it part of SR 433 for technical purposes- I wouldn't have considered myself having clinched the entire Washington highway system unless I drove the entire length of the bridge, but I'm pretty sure ODOT maintains the surface roads on the Oregon side. As far as I'm concerned, it's an ODOT maintained Washington state highway, but more because that's the easiest answer.

[NE2]

ODOT treats their portion as a ramp. So they sign it as a ramp to SR 433. Nothing strange about that.

It's not signed as 'To SR 433' on the Oregon side; it's outright signed as 'North SR 433'.

Just like any other ramp. You don't see "to I-5 north" on a ramp that goes directly to I-5 north.

[Bickendan]

No, you wouldn't see 'To North I-5' on a ramp; ramps as a rule don't have signs. As for the ramp intersections, they'll have the directional signs.
<----
North
I-5

What I mean is the picture corco posted above.

[apeman33]

Aside from the Nebraska-Kansas (14, 15, 25, 27, 99) and Oklahoma-Kansas (8, 99) highways already mentioned , there's also:

K-92 --> MO 92
K-171 --> MO 171 (Which once was K-57 --> MO 57)
K-66 --> MO 66
K-126 --> MO 126
K-52 --> MO 52
K-23 --> OK 23 (Making a KS-OK-TX multi-state 23)
K-96 --> CO 96 (and once also MO 96)

[TheStranger]

MO 80 used to be part of a tri-state route with KY 80 and VA 80 but I think the ferry connection was severed decades ago (not sure when though).

[ClarkE]

Every Kentucky state road that I know of that crosses the state line changes.