Highways that can only be driven in one travel direction

[therocket]

HI 5600 (Kaua'i) from HI 56 to HI 581 in Kapa'a can only be driven southwestbound.

[roadman65]

NY 324, as I stated in another thread, can't be done EB coming off the South Grand Island Bridge, so along Grand Island Blvd in Tonawanda it's only drivable WB only.

[Rothman]

NY 324, as I stated in another thread, can't be done EB coming off the South Grand Island Bridge, so along Grand Island Blvd in Tonawanda it's only drivable WB only.

This was shown to be a false assertion given the actual route of NY 324 in that thread.

[Road Hog]

AR 180 used to form a loop around the old Mount Sequoyah Methodist retreat in Fayetteville, but I don't recall if it was one way or not. The road was decommissioned in the 1990s and turned over to the city.

[jakeroot]

Also, there is a similar central loop somewhere in Japan.

Little bit of a bump. Nagoya and Osaka both have one-way expressways around their central core.

[kinupanda]

Texas Park Road 8 is a one-way clockwise loop through Big Spring State Park.

[MultiMillionMiler]

I-878 in New York, perhaps? I think that unposted route number only applies eastbound.

There actually isn't any westbound side at all. The lanes are only eastbound, not just the defunct state route #.

[US 89]

Georgia 85 can only be clinched southbound because there is no northbound ramp to I-75/285.

[kphoger]

Georgia 85 can only be clinched southbound because there is no northbound ramp to I-75/285.

Disqualifying a clinch because someone did a U-turn there seems a bit over-the-top pedantic.

[jt4]

Ohio hidden State Route 315C is only designated westbound. It runs from the I-670 ramp to Goodale Ave to the Olentangy River Rd ramp to OH-315.

https://www.dot.state.oh.us/TechnicalServices/SLD/SFRASR00315C.pdf