A
speed trap system used to measure the
speed of a
vehicle, used mostly before
radar guns were implemented. It is an
acronym for
Visual
Average
Speed
Computer and
Recorder. Two
points are chosen on a
road, and the
distance between them is
measured. A vehicle is measured on the amount of
time they take to go between the two points, and finally their speed is
calculated from the time and distance measured.
Sometimes I see perpendicular lines drawn on the interstate, and I wonder if that's what these are. Strangely enough, if listening to an AM radio broadcast while travelling on the Florida Turnpike, I can hear a blip of static in the radio at the exact instant I cross over some of these strange perpendicular white lines.