 Road policing unit

A road policing unit (RPU) is the motorway and trunk-road police unit of a British police force.Most territorial police forces established traffic departments in the early 1950s, although the first was established by the Metropolitan Police Service in 1919, but it was with the opening of the M1 motorway in November 1959 that the need for the police to have a specialist department dedicated to policing the new roads was recognised.