Interstate 85 near Exit Number 35-46
Interstate 85 between exit 35 to the SOuth and to exit
46 going North is a highly enforced area. The State Troopers will either sit on an overpass or they will sit on an On ramp with radar running.
I have also noticed that if there is a disabled vehicle on the roadside sometimes they will back the cruiser up to the vehicle and you will not notice them until it is too late.
These guys are pretty good.