Drive up the Glenn Hwy. to Gunsight or Eureka. There would be "Thousands" of Caribou on each side of the road, maybe a few hundred "ON" the road alive, and only God knows how many dead on the shoulder of the road. The DOT would drive back and forth with the plow pushing the dead and guts off the highway this was year around not just winter.
Before the Parks Hwy. was built/completed in the early 70's the Glenn Hwy. was how supplies were moved from port to non-rail areas by Tractor-Trailer. Pre-Pipeline and during construction there were dozens of Caribou hit and killed be vehicles every day. It was not rare to see a big rig with caribou tangled in the moose goosier/catcher. The ice fog and/or snow & wind could cut visibility to just above zero.
The limit was 5 Caribou, but you could harvest as many as you wanted, F&G knew the herd was too large. The only hard rule that was enforced was, "Do not field dress them on the Highway or the shoulder", for that you would get a ticket.
It was about the same on the Denali Haul Road, but it was closed October 1'st. for the winter.