Region: South East
M25. The London Orbital Motorway (J1 to J13)
Statistics and options.
| Section | Construction started | Opened to traffic |
| Dartford Tunnel Southern Approach | January 1985 | September 1986 |
| Dartford to Swanley (J1 to J3) | May 1974 | April 1977 |
| Swanley to Dunton Green | January 1984 | February 1986 |
| Dunton Green to Sundridge Road | September 1977 | July 1980 |
| Sundridge Road to Westerham | December 1976 | November 1979 |
| Westerham to Godstone (J6) | July 1976 | November 1979 |
| Godstone to Reigate (J6 to J8) | January 1972 | February 1976 |
| Reigate to Leatherhead | May 1983 | October 1985 |
| Leatherhead interchange | July 1982 | October 1985 |
| Leatherhead to Wisley | November 1982 | October 1985 |
| Wisley to Chertsey (J11) | September 1981 | December 1983 |
| Advance bridges | November 1978 | September 1980 |
| Chertsey to Thorpe (J11 to J12) | July 1978 | October 1980 |
| Chertsey link | April 1976 | December 1977 |
| Thorpe to Egham (J12 to J13) | July 1974 | December 1976 |