there are some interesting entries on speedtrap.org. one fella said that south hill hwy 58 was a speed trap cause he was ticketed for doing 75 in a 55 zone? I don't know of anyplace in VA where 75 is the legal limit.
don't like their definition of a speed trap "speed trap however
NOUN
1.
a section of a road where hidden police, radar, etc., carefully check the speed of motorists and strictly enforce traffic regulations: sometimes characterized by hard-to-see signals, hidden traffic signs, etc."
strict enforcement is not necessarily a speed trap. nor is using unmarked vehicles.
bumpy