Interstate/State Route Concurrencies

[froggie]

I-94/MN 55 (4 miles; 230-234)

This has been discussed before, but as best as I can tell from official MnDOT docs, there is no I-94/MN 55 concurrency (their logpoint certainly doesn't show such).  So MN 55 has an official gap in downtown Minneapolis.

I-94/MN 95 (5 miles; 253-258)
I-94/MN 210 (3 miles; 54-57)

In light of sbeaver's comment on Interstate/US/state concurrencies, the former includes (unsigned) US 12 while the latter includes unsigned US 52 as well as signed US 59.

[TheHighwayMan3561]

I-94/MN 55 (4 miles; 230-234)

This has been discussed before, but as best as I can tell from official MnDOT docs, there is no I-94/MN 55 concurrency (their logpoint certainly doesn't show such).  So MN 55 has an official gap in downtown Minneapolis.

I haven't had the chance to review the log, but in either case it is now signed at both the Hiawatha and Olson Memorial Highway junctions with I-94 that 55 joins 94 at those points. I guess it depends on whether you consider the log as a more official source than field signs, which is a  valid perspective.

[Zeffy]

But you're forgetting the northernmost mile of I-287, concurrent with NJ 17.

Eventually, the more I forget about this the more I'll actually start to remember it, considering it's one of maybe less than 5 occurrences in New Jersey...

NJ 173 does near Clinton for a short stretch with I-78
[/quote]

It does? I could've sworn that 173 rode parallel to 78 most of the time, never with it.

[Beeper1]

CT doesn't have a single instance (unless you believe CONNDOT, who put up CT 6 signs instead of US 6 in Farmington and West Hartford

I-395 and CT-2A near Norwich.  Not well signed (except from CT-2 EB) but it is official. 

[PColumbus73]

South of Greenville, SC, I-385 has a hidden multiplex with SC 14 for a few miles.

[NE2]

There is one tiny (0.52 mile) overlap, which the highway log confirms. Hint: the ratio of route numbers is 7:6.

There's also I-395/2A, which may not officially exist but is signed.

Florida's only signed one is SR 228 on I-10 and I-95.

[SD Mapman]

South Dakota I-90:
-With SD 34 from Exits 23-30 (Sturgis)
-With SD 79 from Exits 30-61 (Sturgis-Rapid City) (The way this has changed over time confuses me)
-With SD 73 from Exits 143-150 (Kadoka)
-With SD 63 from Exits 163-170 (Belvidere)
-With SD 50 from Exits 265-272 (Chamberlain)
-With SD 45 from Exits 284-289 (Kimball)
-With SD 37 from Exits 330-332 (Mitchell)
-NOT SD 47 - Runs Parallel

No, 79 just got shifted onto the interstate between exits 51-61 a few years ago when they got rid of the s-curve. They just haven't got round to signing it yet in places. Before that, 79's routing through Rapid was weird and hard to follow.
On 47, I don't see why it shouldn't be a concurrency. They could put 248 on the service road.

[rarnold]

Iowa
I-380 and Iowa 27 - 71 1/2 miles
I-35 and Iowa 27 - 24 miles

Kansas
I-70 and K-4 - 13 miles
I-135 and K-4 - 4 miles
I-135 and K-15 - 28 miles
I-435 and K-5 - 2 miles
I-635 and K-5 - 1 mile

Missouri
I-35 and MO-110 - 41 miles

Montana
I-15 and MT-200 - 11 miles
I-90 and MT-200 - 13 miles

[pianocello]

Iowa
I-380 and Iowa 27 - 71 1/2 miles
I-35 and Iowa 27 - 24 miles

And I-80 and Iowa 38 - 4 miles. I think that's it for the state.

[Eth]

I assume you skip Georgia where every Interstate has a hidden State Route concurrency?

You can, however, count the entirety of I-575, which is also (fully signed) SR 5. That's about 30 miles.

[cl94]

-NOT NY 15 - Officially begins in Wayland despite signage that NY seems to keep putting up  (Why doesn't NY just make NY 415 into NY 15?)

They do it because it was once one continuous route and it makes more sense from a commoner's perspective to have one Route 15 than two completely separate ones in close proximity.

I bet they'll stop signing the concurrency when US 15 gets decommissioned north of Williamsport because it will no longer serve a practical purpose.

[NE2]

Which states don't have any? Not counting states already mentioned here:
*Alabama: I-359/SR 69
*Alaska: fuck you
*Arizona: I-17/SR 89A
*Arkansas: I-49/AR 12, I-49/AR 16
*Colorado: I-70/SH 9
*Delaware: none
*District of Columbia: fuck you
*Georgia: I-75/SR 7 from Valdosta to Hahira
*Hawaii: none
*Idaho: I-84/SH 55
*Illinois: I-55/I-64/IL 3
*Indiana: I-69/SR 37
*Kentucky: I-265/KY 841
*Louisiana: I-49/LA 8
*Maine: I-95/SR 15
*Maryland: nothing signed, but I-595/MD 2
*Massachusetts: I-91/Route 2
*Michigan: I-96/M-37
*Mississippi: I-59/MS 42
*Nebraska: I-80/N-71 (thanks DandyDan)
*Nevada: none
*New Hampshire: I-89/NH 10
*New Mexico: none
*North Carolina: I-277/NC 16
*North Dakota: I-94/ND 3
*Oklahoma: I-44/SH 66
*Oregon: I-5/OR 138
*Rhode Island: none
*South Carolina: I-385/SC 14 (well-signed, at least on SC 14 west) and I-585/SC 9 (though signage for I-585 is somewhat lacking)
*Tennessee: I-40/SR 56
*Texas: I-10/SH 17
*Utah: none, unless there's a sign somewhere for SR 30 on I-15 or I-84
*Vermont: none? (I-91/VT 9 doesn't exist)
*Washington: I-405/SR 900
*Wisconsin: I-94/WIS 35
*Wyoming: I-80/WYO 789

That's 40/50 states with something signed.

[SectorZ]

NH has I-293/NH 3A in Manchester, along with the previously mentioned I-89/NH 10 near Lebanon.

Maine has a few I can think of, 2 involving ME 15, overlapping with I-95 and I-395 in Bangor. Really small one with I-295/ME 26 in Portland.

I don't think there is anything in Vermont, US or state route, that is joined with an interstate.

[bulldog1979]

Which states don't have any? Not counting states already mentioned here:
*Michigan: I-96/M-37

Michigan also has I-75/M-55 west of West Branch, but I can't think of any other current ones at the moment.

[Charles2]

Which states don't have any? Not counting states already mentioned here:
*Alabama: I-359/SR 69
*Alaska: fuck you
*Arizona: I-17/SR 89A
*Arkansas: I-49/AR 12, I-49/AR 16
*Colorado: I-70/SH 9
*Delaware: none
*District of Columbia: fuck you
*Georgia: I-75/SR 7 from Valdosta to Hahira
*Hawaii: none
*Idaho: I-84/SH 55
*Illinois: I-55/I-64/IL 3
*Indiana: I-69/SR 37
*Kentucky: I-265/KY 841
*Louisiana: I-49/LA 8
*Maine: I-95/SR 15
*Maryland: nothing signed, but I-595/MD 2
*Massachusetts: I-91/Route 2
*Michigan: I-96/M-37
*Mississippi: I-59/MS 42
*Nebraska: none?
*Nevada: none
*New Hampshire: I-89/NH 10
*New Mexico: none
*North Carolina: I-277/NC 16
*North Dakota: I-94/ND 3
*Oklahoma: I-44/SH 66
*Oregon: I-5/OR 138
*Rhode Island: none
*South Carolina: I-385/SC 14 (well-signed, at least on SC 14 west) and I-585/SC 9 (though signage for I-585 is somewhat lacking)
*Tennessee: I-40/SR 56
*Texas: I-10/SH 17
*Utah: none, unless there's a sign somewhere for SR 30 on I-15 or I-84
*Vermont: none? (I-91/VT 9 doesn't exist)
*Washington: I-405/SR 900
*Wisconsin: I-94/WIS 35
*Wyoming: I-80/WYO 789

That's 40/50 states with something signed.

Others in Alabama:

I-20/59: AL-5 11 miles (Exits 97-108)
I-65: AL-69 5 miles (Exits 299-304)

[NE2]

Also I-22/SR 4, which is signed on intersecting roads at least.

[TheHighwayMan3561]

Other Wisconsin:

I-94/WIS 164
I-39/90+WIS 11

[corco]

Which states don't have any? Not counting states already mentioned here:
*Alabama: I-359/SR 69
*Alaska: fuck you
*Arizona: I-17/SR 89A
*Arkansas: I-49/AR 12, I-49/AR 16
*Colorado: I-70/SH 9
*Delaware: none
*District of Columbia: fuck you
*Georgia: I-75/SR 7 from Valdosta to Hahira
*Hawaii: none
*Idaho: I-84/SH 55
*Illinois: I-55/I-64/IL 3
*Indiana: I-69/SR 37
*Kentucky: I-265/KY 841
*Louisiana: I-49/LA 8
*Maine: I-95/SR 15
*Maryland: nothing signed, but I-595/MD 2
*Massachusetts: I-91/Route 2
*Michigan: I-96/M-37
*Mississippi: I-59/MS 42
*Nebraska: none?
*Nevada: none
*New Hampshire: I-89/NH 10
*New Mexico: none
*North Carolina: I-277/NC 16
*North Dakota: I-94/ND 3
*Oklahoma: I-44/SH 66
*Oregon: I-5/OR 138
*Rhode Island: none
*South Carolina: I-385/SC 14 (well-signed, at least on SC 14 west) and I-585/SC 9 (though signage for I-585 is somewhat lacking)
*Tennessee: I-40/SR 56
*Texas: I-10/SH 17
*Utah: none, unless there's a sign somewhere for SR 30 on I-15 or I-84
*Vermont: none? (I-91/VT 9 doesn't exist)
*Washington: I-405/SR 900
*Wisconsin: I-94/WIS 35
*Wyoming: I-80/WYO 789

That's 40/50 states with something signed.

Montana has I-90/MT 200 as well as I-15/MT 200
South Dakota has I-90/SD 34/SD 79, among others.
Kansas has I-70/K-4, among others.
Cali has I-5/SR-113 among others.
Iowa has I-35/IA 27, among others?

Does Missouri have any? I can't think of any.

[NE2]

Not counting states already mentioned here:

Does Missouri have any? I can't think of any.

I-35/Route 110 and I-72/Route 110. Also I-470/Route 291 if you (rightly) don't count 110 as a technicality. And Iowa has I-80/IA 38 if you ignore IA 27.

[cwf1701]

Which states don't have any? Not counting states already mentioned here:
*Michigan: I-96/M-37

Michigan also has I-75/M-55 west of West Branch, but I can't think of any other current ones at the moment.

I-194/M-66 in Battle Creek

[slorydn1]

Add another for North Carolina:

I-40/NC-24: NC-24 jumps on I-40 from Exit 364 to Exit 373 to bypass Warsaw and Kenansville in Duplin County.

[Kacie Jane]

But you're forgetting the northernmost mile of I-287, concurrent with NJ 17.

Eventually, the more I forget about this the more I'll actually start to remember it, considering it's one of maybe less than 5 occurrences in New Jersey...

NJ 173 does near Clinton for a short stretch with I-78

It does? I could've sworn that 173 rode parallel to 78 most of the time, never with it.

Google maps says no, but Wikipedia (which is probably ripped from the SLDs, though I haven't checked) says yes between Exits 13 and 15. I'm inclined to believe Wikipedia here; the road Google has 173 on there looks nothing like a state highway in street view, and doesn't show any signage.

[NE2]

173 officially uses I-78 per the SLD, but it doesn't appear to be signed. Thanks, I-287/NJ 17!

[Mapmikey]

Virgnia has some, all signed:

I-64/VA 33
I-64/VA 134 (signed on BGSs only as the distance is very short)
I-64/VA 168
I-66/VA 55
I-66/VA 234
I-81/VA 100

Oddly, even though VA 42's gaps are "filled" in the Traffic Logs (i.e. shown as concurrent with VA 100, SR 730, US 460, SR 615, US 220), the Traffic Log does NOT show it concurrent with I-64 (or with the old US 60 routing, SR 632) between US 60 Bus and VA 42-269.

Mapmikey

[Big John]

Other Wisconsin:

I-94/WIS 164
I-39/90+WIS 11

add:

I-39/WI 23
I-43/WI 32, 42, 57 in different spots
future I-41/WI 100, 167, (32 debatable since it is on all CD road)