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Construction Timeline
When the various parts of the M25 and A282 were built, listed in chronological order.
| Open | Jct | Section |
|---|---|---|
| 1975 | J23-24 | South Mimms → Potters Bar |
| 1976 | J12-13 | Thorpe → Egham |
| 1976 | J17-19 | Maple Cross → Hunton Bridge |
| 1976 | J6-8 | Godstone → Reigate |
| 1977 | J2-3 | Dartford → Swanley |
| 1979 | J5-6 | Sundridge Road → Godstone |
| 1980 | J11-12 | Chertsey → Thorpe |
| 1980 | J5 | Dunton Green → Sundridge Road |
| 1981 | J13 | Egham → Yeoveney |
| 1981 | J24-25 | Potters Bar → Waltham Cross |
| 1982 | J13-14 | Yeoveney → Heathrow Spur (A3113) |
| 1982 | J29-31 | North Ockenden → Mar Dyke |
| 1983 | J27-29 | Theydon Garnon → North Ockenden |
| 1984 | J25-27 | Waltham Cross → Theydon Garnon |
| 1985 | J14-15 | Heathrow Spur (A3113) → M4 |
| 1985 | J15-16 | M4 → Iver Heath |
| 1985 | J16-17 | Iver Heath → Maple Cross |
| 1985 | J8-10 | Reigate → Wisley |
| 1986 | J19-23 | Micklefield → South Mimms |
| 1986 | J1a-2 | Dartford Tunnel Southern Approach |
| 1986 | J3-5 | Swanley → Dunton Green |
