Who designed the speed camera?
The Dutch company Gatsometer BV, founded by the 1950s rally driver Maurice Gatsonides, invented the first automated road-rule enforcement cameras. Gatsonides wished to better monitor his speed around the corners of a race track and came up with the device in order to improve his time around the circuit. The company developed the first radar for use with road traffic, and is the world's largest supplier of speed camera systems. Because of this, in some countries all makes of speed cameras are sometimes generically referred to as "Gatsos". They are also sometimes referred to as "photo radar", even though many of them do not use radar.
There was an attempt to record car speeds photographically in France early in the 20th century, but not very successful, inventor not known to me.
Speed cameras work by projecting a laser beam to the passing vehicle which bounces back to the camera. If the information shows the vehicle is over the speed limit, a photograph is taken and forwarded to the appropriate authorities. For more information, you can look at this info graphic: http://www.speedcameralocations.co.uk/speed-camera-infographic.php