M25, Dartford Crossing on the QE2 Bridge
Although officially part of the A282, the Dartford-Thurrock River Crossing is one of the M25's most distinctive landmarks.
South Mimms Regional Control Centre, 2009
Today, the M25 is controlled from two state-of-the-art control centres
Chigwell control centre, 1986
Technology has always played a part in keeping the M25 running. The M25 was among the first motorway to use microprocessor technology.
Traffic Officer operator
Traffic Officer operator at a Regional Control Centre, August 2009.
Bild: Highways Agency