UK road traffic law now facilitates the introduction of new methods of speed detection, especially those that permit automatic and unattended detection by using a camera to record the offending motorist. This is one of a series of handbooks which contain a description of the technical requirements to be met for consideration of type-approval of certain types of speedmeter which are prescribed devices for the purposes of the road traffic legislation. The handbooks are intended to be a reference for manufacturers wishing to develop or sell existing products to the police service in Great Britain. The handbooks contain not only a list of technical requirementsbut also guidance on methods of measurement, and the procedures to be followed in seeking type-approval. This handbook covers speedmeters that are manually operated to measure average speed from measurements of the time taken to travel between two positions and measurements of the distance between them. They can also be used to measure the average speed of the vehicle in which the speedmeter is installed to infer the average speed of the vehicle it is following. For the full text see http://scienceandresearch.homeoffice.gov.uk/
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