Locally Maintained Freeways and Interchanges

[DJ Particle]

There used to be a few of them in the Twin Cities area...

The current US-169 between I-494 and I-94 started out as Hennepin-18 until they opened the new Bloomington Ferry Bridge in the late 1990s.

The "Crosstown" Freeway (current MN-62) used to be Hennepin-62.  The expressway portion west of I-494 is still signed as Hennepin-62.

And Hennepin-122 in Minneapolis was a very tiny freeway until the LRT Green Line was built.  Now it's an expressway.

And as for city-maintained, there's always Ayd Mill Rd.  While it was never truly a freeway, it came damn close until they connected it back to I-35E and added signal lights.

EDIT:  While signed as a state highway (MN-51), I also think Snelling Ave between Hamline U and the fairgrounds is also city-maintained.

EDIT 2:
There's also this interchange on Ramsey-33 (Pennsylvania Ave) https://www.google.com/maps/place/St+Paul,+MN/@44.9608402,-93.0980325,450m/data=!3m1!1e3!4m5!3m4!1s0x52b2d4cee4e9379f:0xc87291d23fda2e29!8m2!3d44.9537029!4d-93.0899578