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Dartford Crossing

The Dartford Crossing of the River Thames combines the Queen Elizabeth II bridge and two tunnels, connecting Dartford in Kent and Thurrock in Essex. With about 160,000 crossings a day, it is one of the busiest road routes in Britain and is considered a part of the M25 motorway route. Tolls apply on the crossing, paid by the Dart Charge system, although it is free between 10pm and 6am. The first tunnel opened in 1963, the second in 1980 and the QE2 Bridge in 1991.