Interstates and US routes that cross only once and do not intersect

[hbelkins]

If an Interstate and US route parallel each other, there will probably be places where they cross but there is no interchange.

But what if they cross only once? Most times, there is an interchange (such as I-64 and US 45 in Middle-of-Nowhere, Ill., but sometimes there isn't.

Kentucky examples:

I-64 passes under US 31 (Clark Bridge) in Louisville.

I-64 crosses US 421 near Midway. However, access is available via KY 341 and US 62. Once upon a time, one of the eastbound guide signs had a "To US 421" notation on it, but it was later changed.

US 25 crosses I-64 near Lexington with no interchange.

I-65 crosses US 150 (Broadway) in Louisville with no exit.

I-65 also crosses US 60 (Main Street and Market Street) without an interchange.

[fillup420]

I-40 completely ignores US 301 in Benson, NC

[jon daly]

In East Hartford, CT, US-5 leaves the Wilbur Cross highway to become Main Street. IIRC you can get on to I-84 west from US-5, but that's the only direct intersection of the two.

[Mapmikey]

I-71 and US 30

I-71 and US 35

I-95 and US 360

I-95 and US 60

I-77 and US 64

[pianocello]

Iowa:
I-380 and US 6. I'm pretty sure that's the only one.

Illinois:
I-88 and US 52

I-280 and US 67, although the nearby exit says "TO US-67"

[hotdogPi]

I-90 and US 7

[vdeane]

I-87 has a TON: US 202, US 6, US 44, US 209, and US 20.  Most of those cross within a mile of an exit, so access isn't actually difficult, but US 44 is more than four miles from an interchange.  All of these are on the Thruway.

I-90/US 11 also counts. Yet again, on the Thruway, but close to exit 36 and easily accessible via I-81.  I think I-90/US 62 as well (yet again, Thruway).

[KEVIN_224]

In East Hartford, CT, US-5 leaves the Wilbur Cross highway to become Main Street. IIRC you can get on to I-84 west from US-5, but that's the only direct intersection of the two.

The only ramp is US 5 North to I-84/US Route 6 West, between the interstate's Exits 57 (CT Route 15 South) and 56 (Governor Street).

[ilpt4u]

Iowa:
I-380 and US 6. I'm pretty sure that's the only one.

Illinois:
I-88 and US 52

I-280 and US 67, although the nearby exit says "TO US-67"

I-294 and US 45 comes darn close in IL. There is an Entrance to I-294 South from US 45 just south of the Mile Long Bridge/North of the 82nd/83rd St Toll Plazas. No Direct Entrances to I-294 North, and no Direct Exits from I-294 to US 45 (plenty of indirect ones).

Of course, that US 45 South to I-294 South ramp also functions as the Missing I-55 South to I-294 South Ramp (US 45/LaGrange Rd is Free Flowing between the two Interstates, across the River/Canal/Rail Lines/Mile Long Bridge Stuff)

US 45 and I-294 cross twice, once near O'Hare and also near the aforementioned Mile Long Bridge

That said, the 2 do cross twice, not once, and there is at least a partial movement available

Over to the Buckeye State now, how about I-76/OH Turnpike and US 62?

[Eth]

Not only do US 19/41 pass under I-20 in Atlanta with no interchange*, but so does US 29 just 1000 feet to the west. None of the three routes cross I-20 again.

* Eastbound exit 56A is signed as US 19/29, but should properly have a "TO", as it spits you out three blocks away from those routes.

[SteveG1988]

I476 and 202, crosses just once near philly, no connection.

[US 89]

I’d bet this is more common on toll roads.

I-44 ignores US 177 in Chandler, OK, opting instead for an interchange with OK 66.
I-335 misses US 75 in southern Topeka. The movement between those two highways involves a connection on I-470 and surface streets.

Before US 40 was decommissioned west of Park City UT, it never had an interchange with I-15 in Salt Lake City.

[GaryV]

I-71 and US 30

...

Did you mean I-75 and US 30?

[Mapmikey]

I-71 and US 30

...

Did you mean I-75 and US 30?

yes

[PHLBOS]

I-76 & US 322 in PA

[ftballfan]

I-80/I-90 and US-127
I-80/I-90 and US-23
I-80/I-90 and US-24

[jon daly]

I-90 and US 7

Thanks. I was trying in my head to figure out if US-5 and I-90 intersect and I forgot about US-7.

[Rothman]

I-90 and US 7

Thanks. I was trying in my head to figure out if US-5 and I-90 intersect and I forgot about US-7.

I'd consider the ramps to US 5 in the I-90/I-91 interchange as an intersection.

[adventurernumber1]

If I recall correctly, US 319 crosses over Interstate 75 in Tifton, Georgia, but there is no direct interchange between the two routes. See here. Interestingly, US 319 splits off of US 82 to go southwest just before both routes reach the interstate - so US 319 barely doesn't have an interchange with I-75 (if it had stayed concurrent with US 82 a little longer and split off west of the interstate, then it would intersect I-75). I've always found this to be incredibly interesting. US 319 crosses I-75 once (right here), and it never sees it again.

This is the only example that comes to my mind right now.

[formulanone]

I-95 and US 27 in Miami, though both terminate at US 1 only a few miles apart.

[Flint1979]

I-71 and US 30

...

Did you mean I-75 and US 30?

yes

There's a TO US-30 sign on I-75 and a TO I-75 sign on US-30.

[TBKS1]

I-44 at US-177. Although there is a very close exit, so does this count?

Edit: Google Street View Link

[TheOneKEA]

I-70 crosses over US 11 in Hagerstown, MD, just east of the former highway's interchange with I-81.

[jp the roadgeek]

I-91 and US 1.  US 1 crosses under right at I-91's southern terminus as it merges into I-95.

[jdb1234]

US 78 crosses over I-459 without an interchange.

Similar to the Tifton, GA example, US 319 used to cross over I-10 without an interchange in Tallahasse as the exit went to FL 61.  When I-10 was widened a decade ago, an interchange was added from I-10 westbound to US 319.