<P> Speedometers were made compulsory for new cars in 1937 . </P> <P> By the late 1980s traffic police were being issued with Laser speed guns which enabled them to measure the speed of a vehicle more precisely . </P> <P> The first speed camera was installed in 1991 . A camera that was installed on the M40 motorway and recorded 400 instances of speeding within 40 minutes . The Association of British Drivers was formed the same year and campaigned vigorously against speed cameras . </P> <P> A Statutory instrument,' The Road Traffic Offenders (Prescribed Devices) Order 1992' was approved in May 1992 coming into force 1 July 1992 allowing for unattended traffic cameras to be used for prosecution of speeding offences . The Gatsometer BV Type 24 was approved in June 1992 . The LTI 20.20, a police operated LIDAR speed gun received type approval in 1993 . </P>

When was the first speed camera introduced in the uk