Wave phenomenon of
traffic compression and decompression, the degree of which varies in relation to the proximilty of a traffic cop, caused by motorists uniformly slowing upon approaching the police and gradually speeding up the further they
go after passing.
Joe knew that even though cars were crawling along
right at the speed limit, it wasn't just traffic. A few quick glances confirmed it was merely coppler effect, as the radar
gun was clearly visible protruding from the patrol
car. It was only a matter of minutes before everyone would again be cruising at 75 mph.