Highway numbers crossing borders

[Tom]

I wonder how many more out there besides these:

1. Ohio Hwy 49 becomes M-49 crossing into Michigan.
2. US-59 in Minnesota becomes Manitoba Hwy 59 crossing into the Dominion of Canada.
3. US-75 in Minnesota becomes Manitoba Hwy 75 crossing into Canada.
4. Minnesota Hwy 61 (originally US-61) becomes Ontario Hwy 61 crossing into Canada.

[corco]

Here we go-

Washington:
US-97 becomes BC-97
US-395 becomes BC-395
Washington 41 becomes Idaho 41 (hooray technicalities!)

Idaho:
Idaho 41 becomes Washington 41 (hooray technicalities!)
US-95 becomes BC-95
Idaho 200 becomes Montana 200 which becomes North Dakota 200 which becomes Minnesota 200
Idaho 87 becomes Montana 87

Wyoming:
Wyoming 59 becomes Montana 59
Wyoming 92 becomes Nebraska 92 becomes Iowa 92 becomes Illinois 92
Wyoming 150 becomes Utah 150

Arizona:
Arizona 264 becomes New Mexico 264
Arizona 78 becomes New Mexico 78
Arizona 80 becomes New Mexico 80 (old US 80)

[froggie]

Almost too many to count.

[Tom]

Certainly more than I realized.  Don't know if this one counts today, but how about when US-99 became BC 99 in Canada?

[Duke87]

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.

[Ian]

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.

Delaware and New Hampshire as well.

[pianocello]

Certainly more than I realized.  Don't know if this one counts today, but how about when US-99 became BC 99 in Canada?

Whenever a US highway crosses the international border into BC and MB (i believe), the highway number stays the same. Exception: US-281(most likely due because it's a 3du or because it ended there only since the 60s).

In my neck of the woods, there's IA-IL 64, IA-IL 136, IL-WI 35, IA-MO 27 (Avenue of the Saints), IA-MO-AR 5, and of course the aforementioned IL-IA-NE-WY 92.

[NE2]

Whenever a US highway crosses the international border into BC and MB (i believe), the highway number stays the same.

And formerly Quebec until they renumbered in the 1970s or so.

[xonhulu]

Oregon only has 2 state routes that keep their numbers when they leave the state: OR 52 and OR 140.  Close on a third: OR 39 becomes CA 139

[myosh_tino]

California...

CA-28 and NV-28
CA-88 and NV 88
CA-266 and NV-266

I think that's it.

[Quillz]

California...

CA-28 and NV-28
CA-88 and NV 88
CA-266 and NV-266

I think that's it.

CA-139 becomes Oregon 39. Not the same but close enough.

[agentsteel53]

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.

Delaware and New Hampshire as well.

not sure what the rationale is for Delaware, but the other states have their route numbers based on the 1922 New England highway system, which preserved numbers across all those states. 

[NE2]

Delaware certainly does not match all Maryland numbers (e.g. 1/528, 2/279, 6/291, 11/302). Most that do match were already signed in Maryland when Delaware finally assigned numbers in the mid-1930s.

Virginia does a pretty good job of matching, sometimes too good of a job: they renumbered 77 to 75 in 1940, expecting Tennessee to renumber 44 to 75 (http://www.virginiadot.org/meetings/minutes_pdf/CTB-10-1940-01.pdf p. 12).

[xcellntbuy]

Several I am familar with in upstate New York are:
NY 2/MA 2
NY 23/MA 23
NY 71/MA 71
NY 43/MA 43
NY 55/CT 55
NY 295/MA 295
NY 67/VT 67
NY 94/NJ 94
PA 17/NY 17/NJ 17
NY 313/VT 313
NY 343/CT 343
NY 14/PA 14
NJ 440/NY 440/NJ 440
NJ 495/NY 495
NY 149/VT 149
NY 346/VT 346
NY 74/VT 74
NY 120/CT 120
NY 120A/CT 120A
NY 35/CT 35

[roadfro]

Nevada

NV 28 & CA 28
NV 88 & CA 88
NV 140 & OR 140
NV 266 & CA 266

Some former ones, changed on the Nevada side in the 1970s renumbering:
NV 30 & UT 30
NV 51 & ID 51

[Scott5114]

I think there's some official policy recommending this somewhere, either issued by AASHTO or in the MUTCD. If memory serves it even suggests it as an alternative to seeking a US route number.

Here's some OK highlights:
OK-152 becomes TX-152
OK-99 becomes K-99, which later becomes NE-99
OK-8 becomes K-8
OK-15 becomes TX-15

[newyorker478]

NY 120/CT 120

Nope, NY 120 stays within New York state while CT 120 runs through Southington and Hartford.

[NE2]

He probably meant 120A.

[newyorker478]

Several I am familar with in upstate New York are:
PA 17/NY 17/NJ 17

Due to I-86, PA 17 from Jamestown to I-90 has been decomissioned. There has been a new PA 17 routed in the SW corner of the state.

[newyorker478]

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.

[NE2]

There has been a new PA 17 routed in the SW corner of the state.

Nope - it's north of Harrisburg, and it was always there as a dupe (like PA 97).

[SP Cook]

West Virginia has plenty.  For one thing every bridge across the Ohio that is not a "real" route of some type is numbered as a 3dsr in both states. These would be:

WV/OH 527 (Huntington 6th Street) (this route follows city streets in Huntington to I-64)
WV/OH 833 (Pomeroy/Mason Bridge)
WV/OH 807 (St. Marys/Newport Bridge)
WV/OH 536 (unsigned in WV, New Martinsville Bridge)
WV/OH 872 (unsigned in WV, Moundsville Bridge)


The "real" ones would be:

WV 9 / VA 9
WV 16 / VA 16 / NC 16
WV 39 / VA 39
WV 43 / PA Turnpike 43 / PA 43
WV 83 / VA 83
WV 84 / VA 84
WV 102 / VA 102 (this road crosses the state line four times)
WV 218 / PA 218
WV 259 / VA 259 (this route "continues" as VA 259 at both ends, actually running from I-81 in Mauzy to US 50 in Gore, both in Virginia)
WV 311 / VA 311 (this route crosses the state line twice)
WV 598 / VA 598 (this is the pre-East River Tunnel US 52)
WV 638 / VA 635
WV 956 / MD 956

One odd one is Monongalia County 857 continues as PA 857.  This is the route now bypassed by the new toll 43.

[vdeane]

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

[agentsteel53]

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

the only one I know of as well.  a lot of the older US/Canada border crossings keep the number of the US highway - even when the US route has been decommissioned.  I-5 turns into BC-99, for example. 

[kurumi]

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