|Location Map ( geo)|
|Runnymede Viaduct that the interchange crosses the Thames.|
|Egham, Surrey / Hythe End, Buckinghamshire|
|Buckinghamshire • Middlesex • Surrey|
|Highways England • Surrey|
|M25, A30, A308, B376, B388|
|Junctions related to the A308|
The Runnymede Interchange is at the point the M25 crosses the River Thames (the crossing of the London Orbital on the east side, at Dartford, is on the A282). The A30 Staines bypass also crosses the River Thames here.
The interchange has two parts: the southern roundabout is called Runnymede Roundabout, while the northern roundabout interchange is unnamed, but forms junction 13 of the M25.
The interchange first opened in 1961 when the A30 crossed the Thames on the original interchange. In 1983, a new bridge opened for the anti-clockwise M25 and the A30 slips therefore the original bridge is now used for the Clockwise M25 and eastbound A30. The B376 & B388 also have spurs linking the interchange for local traffic.
Proposals to widen the M25 in 1994 by means of adding C/D roads would have altered the junction. All movements between the north and south roundabouts would be to the east of the M25. The northern roundabout would be widened on its eastern side to accommodate the extra arm. This scheme was abandoned a few years later in favour of conventional widening so no alterations were made to the junction.
|(M4, M40, M1), Heathrow Airport, Watford|
|(M3, M23, M20), Southampton, Gatwick Airport, Dartford|
|London (W), Hounslow, Staines, Kingston upon Thames (A308)|
|Basingstoke, Camberley, Royal Holloway University of London, Savill Garden, Sunningdale, Bagshot|
|Windsor, Runneymede Memorials, Legoland|
|Egham Town Centre, Shopping Centre, Parking 500 spaces||no road number shown|