Most/fewest US route termini?

[hbelkins]

Terminates one end in Arizona

-  US 60
-  US 64
-  US 70
-  US 89
-  US 93
-  US 95
-  US 160
-  US 180
-  US 191

Arizona doesn't have any current US Routes that pass through the state and don't terminate in it.  Previously US 60, US 70 and US 80 all did pass through Arizona without terminating there.

Leaving anything out?

[fillup420]

North Carolina termini

US 13 south
US 64 east
US 70 east
US 74 east
US 76 east
US 117 north/south
US 158 east/west
US 176 west
US 178 north
US 220 south
US 258 south
US 264 east/west
US 276 north
US 401 north
US 421 south
US 521 north
US 601 north
US 701 north

If we're gonna be pedantic, then US 19E and 19W south 

[Max Rockatansky]

Terminates one end in Arizona

-  US 60
-  US 64
-  US 70
-  US 89
-  US 93
-  US 95
-  US 160
-  US 180
-  US 191

Arizona doesn't have any current US Routes that pass through the state and don't terminate in it.  Previously US 60, US 70 and US 80 all did pass through Arizona without terminating there.

Leaving anything out?

Yes, US 91 on the former pass through list.  US 89A is kind of an odd circumstance given it wasn't clear if it existed in Utah for awhile.  Also, US 66 was on the pass through list (which is why I probably shouldn't try write summaries at work). 

[flan]

Off the top of my head, only US 2 and US 12 pass through North Dakota without ending. That's just 2/8, but only US 10 terminates at some place that isn't the border with Canada.

[bugo]

US 66 briefly ended in Sanders, AZ.
US 70 originally ended in Holbrook.

[Bruce]

It's a shame that in both Washington and California that the few highways left terminating there have none in the big cities of San Diego and Seattle. Both cities have no US routes at left at all.

You figure the big population centers on the Coast would have them, but the interstates replaced them as the west coast don't like redundancy of interstate and US routes together.

For WA, there are long sections where US 99 and US 10 were simply twinned and turned into I-5 and I-90, so there would have to be concurrencies that break the state's soft rules on them. US 2 does end in Everett, which is a major city in its own right.

[hbelkins]

Terminates one end in Arizona

-  US 60
-  US 64
-  US 70
-  US 89
-  US 93
-  US 95
-  US 160
-  US 180
-  US 191

Arizona doesn't have any current US Routes that pass through the state and don't terminate in it.  Previously US 60, US 70 and US 80 all did pass through Arizona without terminating there.

Leaving anything out?

Yes, US 91 on the former pass through list.  US 89A is kind of an odd circumstance given it wasn't clear if it existed in Utah for awhile.  Also, US 66 was on the pass through list (which is why I probably shouldn't try write summaries at work).

I was actually thinking of US 163, unless it doesn't count for some reason or another -- the reason being it's a screwed-up route that really should be a state route.

[Max Rockatansky]

Terminates one end in Arizona

-  US 60
-  US 64
-  US 70
-  US 89
-  US 93
-  US 95
-  US 160
-  US 180
-  US 191

Arizona doesn't have any current US Routes that pass through the state and don't terminate in it.  Previously US 60, US 70 and US 80 all did pass through Arizona without terminating there.

Leaving anything out?

Yes, US 91 on the former pass through list.  US 89A is kind of an odd circumstance given it wasn't clear if it existed in Utah for awhile.  Also, US 66 was on the pass through list (which is why I probably shouldn't try write summaries at work).

I was actually thinking of US 163, unless it doesn't count for some reason or another -- the reason being it's a screwed-up route that really should be a state route.

No it's counts, it just goes to show trying to remember everything from memory and posting during a conference call on my end wasn't the most sound idea.

[kirbykart]

NY: 11, 9, 2, 4, 62, 219, 15 (plus 9W and 20A which really should be state routes) all end here. US 220 comes stupidly close, but its official end is in Pennsylvania just short of the state line (though some signs seem to show it entering New York).

[cockroachking]

US 220 comes stupidly close, but its official end is in Pennsylvania just short of the state line (though some signs seem to show it entering New York).

US-220 officially existed (barely) in NY until 2017, when it was truncated back into PA.

[J N Winkler]

Of current US routes in Kansas, the following have one terminus in the state:  US 73, US 159, US 166, US 177, and US 270, for a total of five.

[jlam]

Terminates one end in CO

• US 24
• US 34
• US 36
• US 38
• US 84
• US 138
• US 164
• US 285
• US 400
• US 450
• US 550

Terminates both ends in CO

• US 350
• US 650

Passes through

• US 6
• US 40
• US 50
• US 85
• US 87
• US 160
• US 287
• US 385
• US 491
• US 666

Roughly half of the US Highways that enter CO terminate there, primarily due to how hard it is to throw a route over them mountains.

[TheHighwayMan3561]

Terminates both ends in CO

• US 550

US 550 ends in New Mexico.

[jlam]

Terminates both ends in CO

• US 550

US 550 ends in New Mexico.

Fixed. Blame the weird wording on the Wikipedia page.

[KCRoadFan]

As far as I know, the only US highway terminus in Missouri - at least, the only one I definitely know about - is barely an example: namely, US 166/400, which begins/ends at Exit 1 on I-44, near the Missouri/Kansas/Oklahoma tripoint between Joplin and Baxter Springs.

Well, there's also US 159 in the northwest corner of the state - but I'm not as sure about that one.

[J N Winkler]

As far as I know, the only US highway terminus in Missouri - at least, the only one I definitely know about - is barely an example: namely, US 166/400, which begins/ends at Exit 1 on I-44, near the Missouri/Kansas/Oklahoma tripoint between Joplin and Baxter Springs.

Well, there's also US 159 in the northwest corner of the state - but I'm not as sure about that one.

US 166, US 400, and US 159 are solid.  In addition, there are also US 56, US 160, and US 275, for a total of six.

[mgk920]

Agreed that Wisconsin has relatively few current US highway ends.

18
51
53
63
141
151

Mike

[KCRoadFan]

As far as I know, the only US highway terminus in Missouri - at least, the only one I definitely know about - is barely an example: namely, US 166/400, which begins/ends at Exit 1 on I-44, near the Missouri/Kansas/Oklahoma tripoint between Joplin and Baxter Springs.

Well, there's also US 159 in the northwest corner of the state - but I'm not as sure about that one.

US 166, US 400, and US 159 are solid.  In addition, there are also US 56, US 160, and US 275, for a total of six.

Why hadn't I thought of US 56? It's right here in my city - kicking myself for that.

Anyway, it stands to reason that Missouri would have relatively few US route termini - it's right in the middle of the country, after all.

[J N Winkler]

Why hadn't I thought of US 56? It's right here in my city - kicking myself for that.

US routes that come into a state "just to die" (like US 56, US 166, US 400, and US 275 for Missouri, and US 177 and US 270 for Kansas) can be hard to catch.  In this regard, it helps that Wikipedia has articles that list the US routes for each state--any route that does not terminate only at itself at the state line is generally one that has at least one end within the state concerned.

Answering for Nebraska (current routes only):  US 26, US 73, US 136, US 138, US 275, and US 283, for a total of six.

Anyway, it stands to reason that Missouri would have relatively few US route termini - it's right in the middle of the country, after all.

Actually, I suspect states within the middle of the country tend to have large numbers of route termini simply because the density of the US route network drops with long-term precipitation averages as you go from east to west.  (Rainfall drove settlement back when the frontier was still open and most Americans lived on farms; the US highways had their origin in a seven-percent system oriented at improving mobility in rural areas.)  And even if you exclude US routes that terminate at the border if each route continues into the neighboring country, border states will still have an artificially high number of US route termini simply because it is far more resource-intensive to maintain a crossing at an international boundary than it is at a state line within the US, because of the need to provide customs and immigration facilities.

An interesting question to ask might be which states punch above their weight in terms of US route termini per head of resident population, with separate divisions for border and inland states.

[SkyPesos]

Why hadn't I thought of US 56? It's right here in my city - kicking myself for that.

US routes that come into a state "just to die" (like US 56, US 166, US 400, and US 275 for Missouri, and US 177 and US 270 for Kansas) can be hard to catch.

Formerly US 460 for MO too I think (thought it got replaced by I-64 west of Louisville). Unless it terminated at the state line and doesn't actually enter St Louis, like how US 25 currently does at OH-KY.

[mgk920]

Agreed that Wisconsin has relatively few current US highway ends.

18
51
53
63
141
151

Wisconsin has more interstate ends than it has US highway ends.

2DIs with one end in the state

39
41

2DIs with both ends in the state

43

3DIs with one end in the state

535

3DIs with both ends in the state

794
894

Mike

[WillWeaverRVA]

Virginia has *a lot* of these:

US 11W (north end, if this counts, VDOT considers this a US 11 TRUCK)
US 11E (north end, if this counts, VDOT considers this US 11)
US 17 (north end)
US 21 (north end)
US 33 (east/south end)
US 48 (east end)
US 58 (east end)
US 60 (east end)
US 211 (both ends, intrastate)
US 219 (south end)
US 221 (north end)
US 250 (east/south end)
US 258 (north end)
US 311 (north end)
US 340 (west end, though it enters Virginia twice)
US 360 (both ends, intrastate)
US 460 (east end, though it enters Virginia twice)
US 501 (north end)
US 522 (south end)

US 1, US 11 (technically speaking if you don't count US 11E), US 13, US 17, US 19, US 23, US 29, US 50, US 52, US 220, and US 421 pass through Virginia without ending.

[Kulerage]

North Carolina termini

US 13 south
US 64 east
US 70 east
US 74 east
US 76 east
US 117 north/south
US 158 east/west
US 176 west
US 178 north
US 220 south
US 258 south
US 264 east/west
US 276 north
US 401 north
US 421 south
US 521 north
US 601 north
US 701 north

If we're gonna be pedantic, then US 19E and 19W south 

You forgot US 311. And highways that just pass through are:

US 1
US 15
US 17
US 19 (though the 19W and 19E make this a little weird)
US 21
US 23
US 25
US 29
US 52
US 129
US 221
US 301
US 321
US 441
US 501

Therefore 19/34 NC US highways end in the state (Ignoring the case of US 19W and E and just counting it as one highway), or 55.9%. Honestly pretty good.

And you know, I never realized that NC actually has a lot of US highways.