The Watchman Casualty Reduction Scheme is a traffic calming measure used in the United Kingdom.
The cameras do not issue fines or penalty points to the driver, but record the number plate, speed and time of vehicles.
Each Watchman System comes standard with high-speed communications allowing access to live and recorded video images without having to physically visit the unit.
This feature allows traffic managers remote access from a PC, laptop or dedicated control room.
Details of up to 2 million vehicles can be stored into its hard disk, in essence creating a traffic census for the stretch of road.