Interstates and US routes w/o a duplex within a state

[Eth]

The original poster said a few threads up that state roads don't count

Then we can add a few to my list for Georgia: I-575, US 11, US 123, and US 378.

[KG909]

Interstate 15 in CA

[kkt]

Does US 160 in NM shit in the woods?

Not enough trees along 160 in NM to be called a wood.

[TheHighwayMan3561]

Since state routes don't count I guess, Minnesota gains I-494 and I-35W (35W doesn't duplex with 94; it's solely a common section). 35W could have counted from the beginning but I forgot to include it or was thinking of I-35 in general which does not count in either format.

[JustDrive]

California has

US 6
US 50 (concurrent with CA 89)
US 95 (concurrent with I-10 and I-40)
US 97
US 101 (concurrent with CA 2, CA 23, CA 1 [four times], CA 166, CA 46, CA 156, CA 152, CA 84, CA 116, CA 128, CA 20)
US 199
US 395 (concurrent with CA 168, CA 120, and CA 299)

I-5 (concurrent with I-10, CA 33, CA 4, CA 113)
I-105
I-205
I-405 (concurrent with CA 22)
I-605
I-805
I-8
I-10 (concurrent with I-5, US 95)
I-110
I-210 (concurrent with CA 2)
I-710
I-15 (concurrent with CA 79, CA 18)
I-215 (concurrent with CA 74, CA 60)
I-40 (concurrent with US 95)
I-80 (concurrent with I-580, CA 12, CA 113, CA 89)
I-280 (concurrent with CA 35, CA 1)
I-380
I-580 (concurrent with I-80)
I-680 (concurrent with CA 84 [northbound only])
I-780
I-880 (concurrent with CA 84)
I-980

[SSOWorld]

Non-duplexed Interstate and US Routes in Wisconsin are....


ONLY I-794!!!

Amazing for a state that likes x-plexing so much that it will put 4 US Routes on one road and 3 Interstates on another.   Not to mention there is an I-US-WIS-CTH medley somewhere.

[hotdogPi]

Non-duplexed Interstate and US Routes in Wisconsin are....


ONLY I-794!!!

Amazing for a state that likes x-plexing so much that it will put 4 US Routes on one road and 3 Interstates on another.   Not to mention there is an I-US-WIS-CTH medley somewhere.

I would say that WI 35 is at fault for invalidating several routes, just by looking at Google Maps.

[NE2]

WI 35 is a logical route that hugs the west edge of the state. Some other routes are not so logical.

[CNGL-Leudimin]

California has

US 6
US 50 (concurrent with I-305, CA 89 and CA 99)
US 95 (concurrent with I-10 and I-40)
US 97
US 101 (concurrent with CA 2, CA 23, CA 1 [four times], CA 166, CA 46, CA 156, CA 152, CA 84, CA 116, CA 128, CA 20)
US 199
US 395 (concurrent with CA 168, CA 120, and CA 299)

I-5 (concurrent with I-10, CA 33, CA 4, CA 113)
I-105
I-205
I-305 (concurrent with US 50 and CA 99)
I-405 (concurrent with CA 22)
I-605
I-805
I-8
I-10 (concurrent with I-5, US 95)
I-110
I-210 (concurrent with CA 2)
I-710
I-15 (concurrent with CA 79, CA 18)
I-215 (concurrent with CA 74, CA 60)
I-238
I-40 (concurrent with US 95)
I-80 (concurrent with I-580, CA 12, CA 113, CA 89)
I-280 (concurrent with CA 35, CA 1)
I-380
I-580 (concurrent with I-80)
I-680 (concurrent with CA 84 [northbound only])
I-780
I-880 (concurrent with CA 84)
I-980

Fixed . I-305 exists, albeit unsigned, so this invalidates US 50 for the purposes of this thread. As I said previously, CA has all but every 2di (I-8 being the exception), unsigned I-305, I-580, US 50 and US 95, without concurrencies with another interstate or US route. I like how many concurrencies US 101 has, but due to all of them being with state routes it still qualifies (The OP excluded those so states like AL, GA, FL which put a hidden state route in all their routes could appear here).

[OCGuy81]

Fixed . I-305 exists, albeit unsigned, so this invalidates US 50 for the purposes of this thread. As I said previously, CA has all but every 2di (I-8 being the exception), unsigned I-305, I-580, US 50 and US 95, without concurrencies with another interstate or US route. I like how many concurrencies US 101 has, but due to all of them being with state routes it still qualifies (The OP excluded those so states like AL, GA, FL which put a hidden state route in all their routes could appear here).

Wait, I think there may be one more.

I-505.  I don't think that shares pavement with any state route, does it?

[hbelkins]

Well, if state routes don't count, then US 79 and I-65 go back on the list for Kentucky.

[kphoger]

Personally, I find the exercise more fun not excluding SRs.

[jp the roadgeek]

I-91 in Vermont.

Plus many short ones (most 3dis that are 10 miles or shorter would qualify).

I-91 in Connecticut.  Conn. 15 flanks it in Meriden, but the two do not share pavement.

Almost the same deal in Hartford too.

I-291, I-384, I-395, I-684 and I-691 also qualify in CT. The only case you can make for RI is I-295 if you consider the fact that US 6 stays on the c/d roads between exits 5 and 6.

[froggie]

Since state routes don't count I guess, Minnesota gains I-494 and I-35W (35W doesn't duplex with 94; it's solely a common section).

You forget that 35W and US 10 are concurrent in Arden Hills, so 35W would still be off the list.

[Molandfreak]

WI 35 is a logical route that hugs the west edge of the state. Some other routes are not so logical.

Tell that to River Falls.

[Molandfreak]

Since state routes don't count I guess, Minnesota gains I-494 and I-35W (35W doesn't duplex with 94; it's solely a common section).

You forget that 35W and US 10 are concurrent in Arden Hills, so 35W would still be off the list.

U.S. 69 and U.S. 8 count, though. U.S. 65 would, but business loop 35.

[NE2]

WI 35 is a logical route that hugs the west edge of the state. Some other routes are not so logical.

Tell that to River Falls.

Tell River Falls that CTH F isn't a state highway. Durr.

A better response would have been "tell that to Cassville". In that case, history is to blame. But it's not exactly a big deal, since the GRR is signed through Cassville.

[rickmastfan67]

(The OP excluded those so states like AL, GA, FL which put a hidden state route in all their routes could appear here).

They are only hidden on the Interstates in Georgia.  All the State Routes that are assigned to US Highways are fully posted there.

[roadfro]

Full list for Nevada. This includes alternates (since most U.S. Alternate routes in Nevada are effectively mainline highways), but not other banners.


I-15 - overlaps US 93
I-80 - overlaps US 95 Alt, US 95, US 93 Alt
I-215 - No overlap
I-515 - overlaps US 93, US 95
I-580 - overlaps US 395; future additional overlap with US 50

US 6 - overlaps US 50, US 93, US 95
US 50 - overlaps US 6, US 93, US 95 (for one block), US 395; future additional overlap with I-580
US 50 Alt - overlaps with US 95 Alt
US 93 - overlaps I-15, US 95
US 93 Alt - overlaps with I-80
US 95 - overlaps I-80, I-515, US 6, US 50 (for one block), US 93
US 95 Alt - overlaps with I-80, US 50 Alt
US 395 - overlaps with I-580, US 50
US 395 Alt - No overlap


EDIT: Forgot I-80 overlap on US 95A

[bassoon1986]

Revised list for Louisiana:

I-12
I-110
I-210
I-220
I-610

I-310 and I-510 only share with LA routes
US 65 can be added.

All other US routes in Louisiana share pavement with another US or Interstate highway.

[Brandon]

Illinois has two:

I-190
I-355

I-474 was until recently when US-24 was put on it to cross the Illinois River.

I-172 could be one, if you consider IL-110 to be just a marketing gimmick instead of a legitimate state route.

All of the US routes are concurrent with something else at one point or another.  US-14 comes the closest, but it has a very short concurrency with IL-43.

[Coelacanth]

Since state routes don't count I guess, Minnesota gains I-494 and I-35W (35W doesn't duplex with 94; it's solely a common section).

You forget that 35W and US 10 are concurrent in Arden Hills, so 35W would still be off the list.

And 494 is paired with MN 5 for a good stretch.

[kphoger]

Since state routes don't count I guess, Minnesota gains I-494 and I-35W (35W doesn't duplex with 94; it's solely a common section).

You forget that 35W and US 10 are concurrent in Arden Hills, so 35W would still be off the list.

And 494 is paired with MN 5 for a good stretch.

Can't believe I didn't catch that one.

[empirestate]

OK, I missed where it said SR's don't count, but in that case, here's NY again. (Routes in bold qualify with or without the SR exception.)

Interstate:
78
278
478
678
878
81
481
781
84
684
87 (I-287, I-90)
287 (I-87)
587
787
88
90 (I-87)
190
290
390
490
590
690
790
890
990
95 (US 1, US 9)
295
495
695
895
99 (US 15)

US:
2
4
6 (US 202, US 209)
9 (I-95, US 20)
9W (US 44)
11
15 (I-99)
20 (US 9)
20A
44 (US 9W)
62
BUS 62
202 (US 6)
209 (US 6)
219 (I-86)
BUS 219
220

[hotdogPi]

Since state routes don't count I guess, Minnesota gains I-494 and I-35W (35W doesn't duplex with 94; it's solely a common section).

You forget that 35W and US 10 are concurrent in Arden Hills, so 35W would still be off the list.

And 494 is paired with MN 5 for a good stretch.

Can't believe I didn't catch that one.

You didn't miss MN 5. It was excluded because it was a state route.

(I still think state routes should count.)