How are aircraft used to monitor speed?
Using white reference marks on the road, the airborne officer simply times the target between two of the marks to establish average speed. Most states use VASCAR (a few use stopwatches), first programming in the known distance between the marks, then operating the time switch to determine target speeds. Cruisers waiting below stop the violator and write the ticket. Contrary to popular belief, radar cannot be used from aircraft.
