^ Exits 136 to 145 needs to be upgraded from a partially controlled access highway into a fully controlled access interstate highway. There’s no traffic signals, access is controlled to some extent with a few frontage roads, and a few interchanges do exist, but some private driveways and intersecting roads still need to be addressed.
North of Exit 145, the freeway meets interstate standards up to the Virginia state line and is posted at 70 mph.
Interestingly, they just recently raised the speed limit north of Reedy Fork Pkwy from 55 mph to 60 mph. A welcome change, IMO, when I drove that section a couple years ago, traffic was seemingly moving over 70 mph.