What is a drag race?
In basic terms, a drag race is an acceleration contest from a standing start between two vehicles over measured distance. These contests are started by means of an electronic device commonly called a "Christmas Tree". Upon leaving the starting line, each contestant activates a timer which is, in turn, stopped when the same vehicle reaches the finish line
The start-to-finish clocking is teh vehicle's E.T. (elapsed time), which serves to measure performance and often serves to determine handicaps during competition.