"Traitor" routes

[hbelkins]

US 231 and US 431:

They are multiplexed from Fayetteville, TN to just south of downtown Huntsville.  In Dothan, US 431 ends at US 231.

And the north end of 431 (Owensboro, KY) was an "almost." It used to end downtown at US 60 just a few blocks from where old 231 crosses 60 and heads across the river to Indiana.

[Beeper1]

MA-122 and MA-122A. 122A starts at 122 as a separate route, meets up for a concurrency though Worcester, split up, then 122A ultimately ends back at 122.

[mightyace]

PA 42 runs into US 220 at Beach Glen, PA.  It duplexes with 220 about a mile or two to Muncy Valley.  PA 42 goes off to a semi-circle through Eagles Mere and ends at US 220 in Laporte, PA while US 220 takes a more direct route.

[route29]

I-10 and US 90 have some concurrences in Texas.  Then US 90 ends at I-10 in Van Horn.

[xonhulu]

I-10 and US 90 have some concurrences in Texas.  Then US 90 ends at I-10 in Van Horn.

This probably happens a lot with interstates and the US Routes they replaced, and historically it probably was even more common during the era when the Interstate routes were being built.

[pianocello]

It's signed both ways, at least on reassurance markers. There may be onramps where you see 94/694 east but only 94 west.

All I bothered to look at on street view was a BGS.

Back on topic, IL-8 has a short half-block concurrency with US-24 in Peoria, and then ends at 24 a few miles east outside of Washington.
EDIT: Of course, this would all be true if 24 was still signed on Adams and Jefferson streets instead of Washington.

[The High Plains Traveler]

Waaaay back, U.S. 101 in Washington spawned U.S. 410, then looped around the Olympic Peninsula and ended on that route.

Nope. The 1927 log clearly has US 101 ending in Olympia (presumably at US 99).

Was 410 in existence at that time?

[NE2]

Was 410 in existence at that time?

Yes. http://www.usends.com/10-19/410/410.html

[Kacie Jane]

Was 410 in existence at that time?

Yes. http://www.usends.com/10-19/410/410.html

My understanding of (a) the history of US routes in the area, and (b) what this thread is trying to describe, would say that US 101 and US 410 would certainly qualify for this thread.  US 101 and US 410 had a concurrency from Olympia to Mud Bay, and then US 410 continued west to end at US 101.

[roadman65]

US 301 is concurrent with US 41 in Bradenton, FL then south of there US 301 ends at US 41 in Sarasota.

Years ago US 13 and US 301 ended at each other.  US 301 ended in DE at US 13 and US 13 ended at US 301 in NC.

[Alps]

Years ago US 13 and US 301 ended at each other.  US 301 ended in DE at US 13 and US 13 ended at US 301 in NC.

Shush, or we'll need to start a new thread!

[Darkchylde]

I'm wondering if I-49 and US 167 would qualify in a way... I-49 multiplexes with US 167 in Alexandria, LA and a couple other places, then in Lafayette, I-49 is multiplexed again with US 167. They meet I-10 like this - US 167 goes on, I-49 ends. (Currently, anyway.)

[roadman65]

What about US 9 and NY 9N in New York? NY 9N is an alternate route to US 9, it has two concurrencies with each other (one of them wrong way) and NY 9N terminates at its parent at both ends.

NY 9A multiplexes with its parent in the Bronx and ends at its parent several miles north of this.  Plus, it used to be connected to its parent via the defunct US 9 Business that went through the Holland Tunnel decades ago at is south end as well.

[TheStranger]

What about US 9 and NY 9N in New York? NY 9N is an alternate route to US 9, it has two concurrencies with each other (one of them wrong way) and NY 9N terminates at its parent at both ends.

US 70S and US 70 in Nashville have the same sort of relationship as well, where they manage to be concurrent for a mile or two!

[national highway 1]

When US 91 used to extend further south, from 1937-1974, it overlapped US 6 in central Utah, then the two routes met again in Long Beach, CA, where they terminated at each other.

[roadman65]

US 319 in Florida has two multiplexes with US 98 and terminates while on US 98 a few miles east of Apalachicola, FL.  US 319 just ends at nowhere, with an now placed end sign (as seen on Dale Sanderson's US Ends) where originally it was never marked.

In Nashville you have US 41 and US 41 Alternate that are concurrent for a mile or so then both routes part ways to have the Alternate end at is mainline someplace else.  It is odd to say an alternate and mainline duplex when they are supposed to be two separate alignments. Nonetheless the split to junction again at both ends.