 Sulby village located on the A3 road including the Sulby Straight and Sulby Bridge was part of the 37.50 Mile Four Inch Course for the RAC Tourist Trophy automobile races held in the Isle of Man between 1908 and 1922.In 1911, the Four Inch Course for automobiles was first used by the Auto-Cycling Union for the Isle of Man TT motor-cycle races.This included the Sulby Straight and the course later became known as the 37.73 mile Isle of Man TT Course which has been used since 1911 for the Isle of Man TT Races and from 1923 for the Manx Grand Prix races.