U.S. Routes that enter and leave a state concurrent with different interstates

[ColossalBlocks]

US 412 & I-155 in Dyer County across the Mississippi River to Dyersburg.

Dammit, i was going to use Dyer County as an example.

[Kacie Jane]

Also, US 46 comes close. It used to cross from NJ into PA with I-80 (I think) and ends at the NJ/NY state line concurrent with I-95.

Nope. By the time I-80 was built, US 46 had already been permanently truncated to New Jersey. And when US 46 did cross into Pennsylvania, it was a couple of miles south of where I-80 does now.

[bulldog1979]

Fortunately, US-40 actually just stays concurrent with I-64 until it hits I-70 in O'Fallon.

Huh?  US-50 does...  (And old highway 50 in O'Fallon is called just plain "Highway 50," which makes navigating there for the first time fun...

US 50 follows merges onto I-44, then follows after a solo routing. It follows I-255 across the Mississippi River into Illinois and then I-64 to O'Fallon.