Highways that multiplex, but later one terminates the other

[wxfree]

US 90 starts at I-10 in Van Horn, TX, and later is concurrent with I-10 in San Antonio and eastern Houston.

That's almost true.  You might say it's effectively true.  But it isn't technically true.  According to TxDOT, US 90 starts at BI 10 D, the Interstate business route.  Years ago it was US 80, which was the logical place for US 90 to start.  Nothing in the designation file specifies that the beginning was moved to I-10, even after US 80 was moved there.  The signs going north from I-10 say it's SH 54, while the signs going south from Broadway say it's US 90.  But the authoritative map, the Statewide Planning Map, shows the section between I-10 and Broadway as US 90.

[OCGuy81]

OR 34 is concurrent with US 20 through Corvallis, OR only to terminate at US 20 in Lebanon, OR

[roadman65]

US 13 concurs with US 1 and eventually ends at it in Morrisville, PA.

[webny99]

NY 3 really whiffed this exercise by continuing beyond NY 104 to end at NY 104A in Sterling. It's got the multiplex with NY 104 in Mexico and then the junction outside Hannibal, so if it wasn't for that extension, it would be a perfect example.

NY 13/US 11 is another almost-example. You've got the multiplex in Cortland and then the crossing in Pulaski that would be a conceivable spot for NY 13 to end... but nope, it continues to Port Ontario, where it ends (fittingly) at NY 3 instead.

[KeithE4Phx]

OH 2 begins at US 20 in Lake County, then they multiplex from Cleveland out to Rocky River. Interestingly enough, OH 2 also multiplexes with Alternate US 20 west of Toledo (though not at its termini).

OH 2 begins at the OH-IN state line, SW of Hicksville.  It is IN 37 on the Indiana side of the border.  It meanders a bit, multiplexed with US 6 and some other state highways before reaching US 20A.

[webny99]

NY 3 really whiffed this exercise by continuing beyond NY 104 to end at NY 104A in Sterling. It's got the multiplex with NY 104 in Mexico and then the junction outside Hannibal, so if it wasn't for that extension, it would be a perfect example.

NY 13/US 11 is another almost-example. You've got the multiplex in Cortland and then the crossing in Pulaski that would be a conceivable spot for NY 13 to end... but nope, it continues to Port Ontario, where it ends (fittingly) at NY 3 instead.

...and just when I thought I'd found the most egregious almost-examples possible, here's another:

NY 324 and US 62 have the multiplex north of Buffalo, then NY 324 joins I-190 and makes it all the way across Grand Island on a collision course with US 62, only to exit and terminate at NY 384 less than a mile away.

[dgolub]

Here on Long Island, NY 25 and NY 25A are multiplexed for a little while in Smithtown.  Later, NY 25A ends at NY 25 in Calverton.

[roadman65]

Then US 41 ALT in TN-KY should count as it concurs with its parent through Nashville and ends at its parent at both ends.

[ahj2000]

How about I 95?
Starts in Miami at US 1 and does the 1-9 multiplex across the GW bridge into NYC

[hotdogPi]

How about I 95?
Starts in Miami at US 1 and does the 1-9 multiplex across the GW bridge into NYC

Reply #4

[cwf1701]

US 127 has a concurrency with US 27 in Cincinnati, and terminates at US 27 in Chattanooga.

Nope. It's unsigned, but US 127 continues past US 27 and terminates in downtown Chattanooga.

and historic, US-127 terminated at the Junction of US-27 (todays US-127) near Lansing MI.

[DandyDan]

I knew there was one of these in Nebraska, but it wasn't anywhere I've actually been. NE 7 overlaps US 183 from the Long Pine area over to Bassett (along US 20), then ends at US 183 south of Springview.

[vdeane]

How about I 95?
Starts in Miami at US 1 and does the 1-9 multiplex across the GW bridge into NYC

Maybe.  Florida changed the alignment of US 1 so now it has a short overlap at the southern section of I-95.  Does that still count for the purposes of this thread?

[SkyPesos]

How about I 95?
Starts in Miami at US 1 and does the 1-9 multiplex across the GW bridge into NYC

Maybe.  Florida changed the alignment of US 1 so now it has a short overlap at the southern section of I-95.  Does that still count for the purposes of this thread?

Not sure, but if it does, that means I-75/I-640 in Knoxville is also an example because I-75 (and I-40) are through routes while I-640 ends. Same with I-80/I-294 in IL and I-41/I-94 in WI.

[roadman65]

US 19 does as in GA it concurs with US 41, but it ends at US 41 in FL.

US 301 concurs with US 41 also in Bradenton, but terminates at it in Sarasota.

US 441 concurs with US 41 between High Springs and Lake City and ends at it in Miami.


Florida has another. US 23 in Jacksonville.  Concurs with US 1 from north of Alma, GA to Jacksonville and then ends at US 1 in Jacksonville.

[dvferyance]

I-64 formally until I-70 was rerouted on the Stan Musial Bridge. I-64 was duplexed with I-70 in East St Louis IL then later it ends at I-70 in Wentzville MO.

[roadman65]

Does I-676 in NJ count?  The way it is signed from I-295 is like the two are concurrent from the end at I-295 in Bellmawr to the Walt Whitman approach in Gloucester City, even though you would figure that I-676 ends at I-76 at the bridge approach.

[WNYroadgeek]

NY 33 overlaps NY 5 in Batavia, then later terminates at it in Buffalo.

[kenarmy]

US 24 and 6 have a concurrency in Ohio, but 24 terminates at 6 in Mintrum, Colorado. US 87 has a concurrency with I-25 in.. well pretty much everywhere, but 25 terminates at 87 and I-90. It's the opposite for 85 with I-10.

[ilpt4u]

I-64 formally until I-70 was rerouted on the Stan Musial Bridge. I-64 was duplexed with I-70 in East St Louis IL then later it ends at I-70 in Wentzville MO.

Was I-64 finished to Wentzville/I-70 before I-70 was routed on the Stan Span?

Now they bump in East St Louis, and then 70 terminates 64 in Wentzville

[SkyPesos]

I-64 formally until I-70 was rerouted on the Stan Musial Bridge. I-64 was duplexed with I-70 in East St Louis IL then later it ends at I-70 in Wentzville MO.

Was I-64 finished to Wentzville/I-70 before I-70 was routed on the Stan Span?

Now they bump in East St Louis, and then 70 terminates 64 in Wentzville

From a search on Google Maps, I-64 was on I-70 exit 210's signage since 2009. The Stann Musial Bridge was finished in 2014.

[DandyDan]

Another for Wisconsin: US 53 and WI 35 briefly overlap in La Crosse and later around Holmen, then ends at US 53 (and I-535) in Superior.

[TheStranger]

A California example I just saw on Google Maps:

Route 38 begins at Route 18 west of Big Bear Lake, then have a wrong-way concurrency in the town of Big Bear itself on the east shore. This was actually created in the 1960s after then-Route 30 was cut back west towards Running Springs (and eventually rerouted south towards Redlands on what is now Route 210).

Route 1 and Route 35 (and its predecessor Route 5, from 1957 onwards) had a brief concurrency in Daly City from today's Route 1/Route 35 junction north to John Daly Boulevard, before 35 continued north then east to end at Route 1 in SF.

[dkblake]

Here on Long Island, NY 25 and NY 25A are multiplexed for a little while in Smithtown.  Later, NY 25A ends at NY 25 in Calverton.

NY 33 overlaps NY 5 in Batavia, then later terminates at it in Buffalo.

In an example about as far away from both the other NY state examples as possible, NY 26 overlaps NY 12 in Lowville before terminating at it in Alexandria Bay.

[US 89]

US 87 has a concurrency with I-25 in.. well pretty much everywhere, but 25 terminates at 87 and I-90. It's the opposite for 85 with I-10.

Wait what? US 85 ends at the Mexican border. And 87/25 isn't really a fair example seeing as 87 is actually concurrent with 25 at that point...