Roads that cross themselves

[kphoger]

Does a roundabout count?

Only if legally permitted U-turns count too.

[Rothman]

The realignment of the PA Turnpike when Rays and Sideling Hill Tunnels got bypassed is what made it what it was today.

That, the original prohibition of spending federal funds on direct interstate to toll road connections.

*citation needed*

[Occidental Tourist]

The realignment of the PA Turnpike when Rays and Sideling Hill Tunnels got bypassed is what made it what it was today.

That, the original prohibition of spending federal funds on direct interstate to toll road connections.

*citation needed*

" In some cases, Federal funds were used to build interchanges between toll-free Interstates and Interstate turnpikes. However, under Section 113 (c) of the Federal-Aid Highway Act of 1956, the State highway agency and toll authority had to first enter into an agreement to use all toll revenue to pay for debt retirement, maintenance, and operation, after which toll collection would end . . . The Pennsylvania Turnpike Commission (PTC), which had no desire to stop collecting tolls, decided not to use the State's Federal-aid funds for the I-70 connection. The PTC also decided against using its own revenue for the interchanges."

[Rothman]

The realignment of the PA Turnpike when Rays and Sideling Hill Tunnels got bypassed is what made it what it was today.

That, the original prohibition of spending federal funds on direct interstate to toll road connections.

*citation needed*

" In some cases, Federal funds were used to build interchanges between toll-free Interstates and Interstate turnpikes. However, under Section 113 (c) of the Federal-Aid Highway Act of 1956, the State highway agency and toll authority had to first enter into an agreement to use all toll revenue to pay for debt retirement, maintenance, and operation, after which toll collection would end . . . The Pennsylvania Turnpike Commission (PTC), which had no desire to stop collecting tolls, decided not to use the State's Federal-aid funds for the I-70 connection. The PTC also decided against using its own revenue for the interchanges."

Despite the law, it was still a state-level decision to not fund the building of interchanges between the Turnpike and free limited-access highways.  Other states managed it just fine; I assume through using toll revenue and other non-federal funding.