Region: Eastern
M25 London Orbital Motorway (Junctions 13 to 30)
Statistics and options.
| Section | Construction started | Opened to traffic |
| Egham to Yeoveney (J13 to J14) | January 1979 | October 1981 |
| Yeoveney to Airport spur | September 1980 | August 1982 |
| Runnymede bridge | June 1977 | July 1980 |
| Airport spur to M4 (15) | April 1983 | December 1985 |
| M4 to Iver Heath (J15 to J16) | April 1983 | September 1985 |
| M40 Interchange (J16) | July 1982 | September 1985 |
| M40 to Maple Cross (J16 to J17) | January 1983 | January 1985 |
| Maple Cross to Hunton Bridge (J17 to J19) | October 1973 | February 1976 |
| Micklefield to South Mimms (J19 to J23) | Various | October 1986 |
| South Mimms to Potters Bar (J23 to J24) | May 1973 | September 1975 |
| Potters Bar to Waltham Cross (J24 to J25) | June 1979 | June 1981 |
| Waltham Cross(J25) to River Lee | September 1980 | January 1984 |
| River Lee to Upshire(J26) | July 1981 | January 1984 |
| Upshire to Theydon Garnon (J26 to J27) | June 1981 | January 1984 |
| Theydon Garnon(J27) to Passingford Bridge | October 1980 | April 1983 |
| Passingford Bridge to Brentwood(J28) | January 1981 | April 1983 |
| Brentwood to North Ockendon (J28 to J29) | October 1980 | April 1983 |
| North Ockendon(J29) to Stifford Road | September 1979 | December 1982 |
| Stifford Road to Mar Dyke | January 1979 | December 1982 |
| Dartford Tunnel North Approach | March 1957 | November 1963 |
| Dartford Tunnel | June 1972 | May 1980 |