US Routes that have no junctions with another US route within a state.

[pianocello]

US-54 in Illinois doesn't count either; it ends at I-72/US-36.

[corco]

Not true for Wyoming US-87 (mostly concurrent with I-25 or I-90), Texas US-180 west (mostly concurrent with 62 or 85), Iowa US-77 (concurrent with US-20), Missouri US-166 (concurrent with US-400), Missouri US-400 (concurrent with US-166), or Missouri US-40 (concurrent with I-64) either.

[Kacie Jane]

nj.us009w

That's an obvious false positive.  Its southern end is at I-95/US 1/9/46.

[Jim]

I hadn't thought about all the ways and how often concurrencies affect this.  More false positives than I would have guessed.

[JustDrive]

US 50 in California.  Its first U.S. Route intersected going eastbound is in Carson City, NV.

[US71]

Probably a minor point of discussion, as there aren't that many examples of US Routes leaving and re-entering a state.  I'm thinking maybe a dozen examples, tops?

US 71 goes from Arkansas to Texas back to Arkansas.  US 271 used to go from Arkansas to Oklahoma to Arkansas, but this was changed many years ago.

US 59 goes from Arkansas to Texas to Arkansas along US 71, then back into Texas along I-30.

[Takumi]

Virginia has two multi-entry routes: US 340 and US 460.

[national highway 1]

US 95 and US 97 in California.

[Alps]

MD - US 522 meets US 40 while it's on I-68/70.

[PurdueBill]

I recall reading once that AASHTO believes that US 3 ends at US 20, crossing the BU Bridge to do so.  If that is true, then US 3 would be off the list.  But is that terminus generally accepted?  Mass doesn't sign it, doesn't list it that way, and treats MA 3 and US 3 as if they were one route, so is there any reality to US 3 meeting US 20 at all?

Good thing the thread wasn't locked.  There seems to be plenty to talk about.

[deathtopumpkins]

I recall reading once that AASHTO believes that US 3 ends at US 20, crossing the BU Bridge to do so.  If that is true, then US 3 would be off the list.  But is that terminus generally accepted?  Mass doesn't sign it, doesn't list it that way, and treats MA 3 and US 3 as if they were one route, so is there any reality to US 3 meeting US 20 at all?

I think it originally did, but, at least according to US Ends, it currently ends on Memorial Drive at Mass Ave (MA 2A) in Cambridge. This is also backed up by both Google Maps, not that that means much, and CHM.

Wikipedia, however, says that it crosses the BU Bridge to end at US 20 according to AASHTO, but that MassDOT recognizes the end at Mass Ave. It doesn't provide a citation for either of these statements though.

I think I personally would count US 3 as at least meeting US 20 (but maybe not ending at it) because the distance across the BU Bridge is fairly short, and has no other intersections between the two routes.

[PHLBOS]

Actually the hand-off point location for US 3/MA 3 dates back to when US 1 ran along Memorial Drive in its pre-1971 alignment.  By right, the US 3 designation should've extended down to US 1 at I-93.

According to an old 1937-era map, US 20 ran along Commonwealth Ave. to the Boston Common (currently designated as MA 2); so at one time, it did indeed intersect w/US 1.  Today, most maps show US 20 ending at the Commonwealth Ave./Beacon Street intersection at Kenmore Square.  Granted the US 20 signs at that intersection (at least through the 1980s were non-existent).  US 20 West starts along Commonwealth Ave. west of Beacon St. and MA 2 West transitions from Commonwealth Ave. onto Beacon St. (which becomes a 2-way road west of the intersection).

So US 1 in MA didn't always have no other US highways crossing it.

[NE2]

I think it originally did, but, at least according to US Ends, it currently ends on Memorial Drive at Mass Ave (MA 2A) in Cambridge. This is also backed up by both Google Maps, not that that means much, and CHM.

And OSM, which imported road data from MassGIS (rather than TIGER), including route designations.

Actually the hand-off point location for US 3/MA 3 dates back to when US 1 ran along Memorial Drive in its pre-1971 alignment.  By right, the US 3 designation should've extended down to US 1 at I-93.

Actually, if it had been extended to US 1, it would have ended at Charles Circle (northbound) and Leverett Circle (southbound - 3 used to follow 28 across the dam, southbound only).

[PHLBOS]

Actually the hand-off point location for US 3/MA 3 dates back to when US 1 ran along Memorial Drive in its pre-1971 alignment.  By right, the US 3 designation should've extended down to US 1 at I-93.

Actually, if it had been extended to US 1, it would have ended at Charles Circle (northbound) and Leverett Circle (southbound - 3 used to follow 28 across the dam, southbound only).

That would be true had US 1 maintained its pre-1989 alignment (when it still ran along most of Storrow Drive).  However, since US 1 currently runs w/I-93 along via the O'Neill Tunnel, the on/off ramps to Storrow Drive to the Tunnel would be designated as US 3 as well.

[hbelkins]

US-54 in Illinois doesn't count either; it ends at I-72/US-36.

Huh? If it terminates at US 36, then it most certainly would have a junction with a US route.

But wouldn't US 113 in Delaware count now, since it no longer is signed all the way north back to US 13 at Dover?

[roadman65]

US-54 in Illinois doesn't count either; it ends at I-72/US-36.

Huh? If it terminates at US 36, then it most certainly would have a junction with a US route.

But wouldn't US 113 in Delaware count now, since it no longer is signed all the way north back to US 13 at Dover?

You forgot US 9 at Georgetown.

[DandyDan]

US 412 in Missouri intersects US 61, when it is concurrent with I-55

[NE2]

Actually the hand-off point location for US 3/MA 3 dates back to when US 1 ran along Memorial Drive in its pre-1971 alignment.  By right, the US 3 designation should've extended down to US 1 at I-93.

Actually, if it had been extended to US 1, it would have ended at Charles Circle (northbound) and Leverett Circle (southbound - 3 used to follow 28 across the dam, southbound only).

That would be true had US 1 maintained its pre-1989 alignment (when it still ran along most of Storrow Drive).  However, since US 1 currently runs w/I-93 along via the O'Neill Tunnel, the on/off ramps to Storrow Drive to the Tunnel would be designated as US 3 as well.

Well, since US 3 was presumably cut back in 1971, US 1 was still on Storrow.

[vtk]

Nearly every U.S. route in California. All I could think of for junctions was 101 at 199.

6 and 395?

That's in Hill Valley, isn't it?

[national highway 1]

6 and 395 is in the town of Bishop.

[codyg1985]

tn.us023

This isn't really the case. US 23 intersects with US 19W, runs concurrently with US 19W from south of Erwin to Johnson City, intersects with US 321 and US 11E in Johnson City, and US 11W in Kingsport. Maybe it was included in the list since it runs along I-26 for its entire length in TN?

One that isn't on the list that should be is US 421 in TN. It comes close to intersecting US 11E and US 19 in Bristol, Tennessee, but doesn't actually do so until just across the state line in Virginia.

[NE2]

One that isn't on the list that should be is US 421 in TN. It comes close to intersecting US 11E and US 19 in Bristol, Tennessee, but doesn't actually do so until just across the state line in Virginia.

Last year AASHTO approved a relocation of US 421, west on Edgemont to US 11E-19 in Tennessee. I don't know if it's been signed.

[Roadsguy]

Now that I'm in the right thread...

US 220 in NY.

Was it already mentioned?

[hbelkins]

Last year AASHTO approved a relocation of US 421, west on Edgemont to US 11E-19 in Tennessee. I don't know if it's been signed.

Wasn't as of back in the summer. My wife and I were down there and I took her down State Street and to see the big overhead Bristol sign, and there was no evidence that 421 has been routed that way. There's been a slight realignment and a new bridge built, but it's not signed to continue over to 11E and 19.

[Alps]

Now that I'm in the right thread...

US 220 in NY.

Was it already mentioned?

Intersects US 17.