roads that cross the same state line multiple times

[zachary_amaryllis]

I didn't find this in another thread [or wasn't looking hard enough?]

are that any examples of this on a U.S. or interstate highway?

best I can come you with is I-684 starting in ny, goes into ct briefly, then back into ny

[hotdogPi]

US 2 in Michigan and Wisconsin
US 50 in Maryland and West Virginia
US 52/119 in West Virginia and Kentucky
US 54 in Texas
US 62 in Texas
US 71 in Arkansas
US 72 in Tennessee (same state twice, but not same state line twice)
US 141 in Michigan and Wisconsin
US 180 in New Mexico and Texas
US 212 in Montana and Wyoming
US 340 in Virginia
US 395 in California
US 460 in Virginia

This list should be complete for US routes.

[Road Hog]

US 2 in Michigan and Wisconsin
US 50 in Maryland and West Virginia
US 52/119 in West Virginia and Kentucky
US 54 in Texas
US 62 in Texas
US 71 in Arkansas
US 72 in Tennessee
US 141 in Michigan and Wisconsin
US 180 in New Mexico and Texas
US 212 in Montana and Wyoming
US 340 in Virginia
US 395 in California
US 460 in Virginia

This list should be complete for US routes.

If you count US 71 in Arkansas, US 59 counts too.

[SkyPesos]

I-435: KS-MO
I-495: If you ignore the 300 feet of DC, VA-MD

I thought there would be more beltways, but this is all I can think of. I-275 crosses 3 state lines, I-485 barely misses the SC state line, I-270 isn't a single route with I-255, I-265 lacks a southern IN-KY crossing.

For 2di, the Eastern I-86 crosses PA-NY 3 times

[ilpt4u]

Is I-24 breaking the rules, here? Although with its quick dip into Georgia, I guess it only crosses the TN state line 3 times, since the southeast termination of the route is in Chattanooga

[CoreySamson]

I-49 will in the future in the vicinity of Texarkana.

[dlsterner]

I didn't find this in another thread [or wasn't looking hard enough?]

are that any examples of this on a U.S. or interstate highway?

best I can come you with is I-684 starting in ny, goes into ct briefly, then back into ny

I realize that the OP asked for US or Interstate highways, but if you are willing to relax that restriction:

Clingman's Dome Road (Great Smoky Mountains National Park) crosses the North Carolina / Tennessee border five times.  I don't think any of them are signed.

[The Nature Boy]

If we're relaxing the US/Interstate Highway rule then this gets more interesting:

The GW Parkway in Virginia crosses into DC at Gravelly Point and then back into Virginia just past the Arlington Memorial Bridge. None of this is signed and I'm sure that most locals would tell you that the GW Parkway is entirely in Virginia.

[fillup420]

going with the relaxed rules....

NC 106/GA 246 crosses the NC/GA line 5 times at the border

[TheHighwayMan3561]

In southeast Minnesota/northeast Iowa, Houston County 2/Allamakee County A11 crosses the border three times.

[pianocello]

The Alaska Highway crosses the Yukon/BC border 9 times.

[jp the roadgeek]

RI 114A crosses into MA then back into RI
NH 125 crosses into ME for a stretch, then crosses back into NH before ending about a mile later.

ME 113 crosses the NH border, then comes back to straddle the border, bends back into NH, then finally crosses back into ME.  A child route, ME 113B, also loops into NH

[hotdogPi]

NH 125 crosses into ME for a stretch, then crosses back into NH before ending about a mile later.

153, not 125

[kurumi]

Old CT 124 in North Canaan, from west to east: CT / MA / CT / MA. It was never signed (as anything) in MA to my knowledge. When CT 124 was retired in 1963, two separate unsigned routes replaced it (to avoid the confusion of having a discontinuous unsigned route :-)

[hotdogPi]

It was never signed (as anything) in MA to my knowledge.

If Mapquest (previously) and Apple Maps (currently) both think it's MA 73, they must both be getting it from the same source somewhere...

[US 89]

This list should be complete for US routes.

You didn't mention US 191, which crosses the Montana-Wyoming border twice.

[hotdogPi]

This list should be complete for US routes.

You didn't mention US 191, which crosses the Montana-Wyoming border twice.

Sorry. The list I was looking at did list US 191 in the same state twice, but I ignored it because I thought it was referring to being split into two segments by Yellowstone.

[TheHighwayMan3561]

US 2 in Michigan and Wisconsin
US 50 in Maryland and West Virginia
US 52/119 in West Virginia and Kentucky
US 54 in Texas
US 62 in Texas
US 71 in Arkansas
US 72 in Tennessee (same state twice, but not same state line twice)
US 141 in Michigan and Wisconsin
US 180 in New Mexico and Texas
US 212 in Montana and Wyoming
US 340 in Virginia
US 395 in California
US 460 in Virginia

This list should be complete for US routes.

Should also be noted one of the US 2/141 border crossings is a concurrency.

[michravera]

I didn't find this in another thread [or wasn't looking hard enough?]

are that any examples of this on a U.S. or interstate highway?

best I can come you with is I-684 starting in ny, goes into ct briefly, then back into ny

As written, most 2dis would qualify. I-5, for instance, crosses into and out of Oregon. I-95, I-10, I-40, I-80, cross into and out of most states that they cross.

Now, if we are looking for highways that cross a border between the SAME TWO states more than once, that's a different matter. TheHighwayMan gave a pretty good starter list.

[jp the roadgeek]

Old CT 124 in North Canaan, from west to east: CT / MA / CT / MA. It was never signed (as anything) in MA to my knowledge. When CT 124 was retired in 1963, two separate unsigned routes replaced it (to avoid the confusion of having a discontinuous unsigned route :-)

And then, ironically enough, the number was repurposed to reciprocate with NYSDOT for NY 124; only to have NY retire the piece of its route south of Pound Ridge.  Now you do have a discontinuous route that is unsigned once you cross the NY border (and is no longer concurrently signed with NY 137).

Oh, and add NY 120A to the list.  Crosses and straddles the NY/CT border multiple times.  And how can we forget the eastern I-86 with the Waverly Dip for a 2nd and 3rd crossing of the PA/NY border?

[cpzilliacus]

U.S. 119 (ADHS Corridor G) jumps back and forth between Mingo County, West Virginia and Pike County, Kentucky over the Tug Fork several times (five times total, I believe).

[Bickendan]

The Alaska Highway crosses the Yukon/BC border 9 times.

Related: NT 5 dips into Alberta a couple times.

[sbeaver44]

For purposes of this question, how are we treating MD/DE 54?

[CtrlAltDel]

For purposes of this question, how are we treating MD/DE 54?

I would treat it the same way as US-54.

[frankenroad]

I-86 crosses the PA/NY border three times, but I believe the eastern two crossings, where 86 dips briefly into PA, are not signed.  They weren't signed the last time I went through there, but that was nearly 20 years ago.