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Early Plans

Later Plans

Finishing the loop

After the collapse of the Ringway plans, the question of how to link the two half loops that were being built had to be answered. The motorway standard section of Ringway 3 would run from the A1 at Bignells Corner (and possibly still further west), to the M20 at Swanley Interchange, and Ringway 4 would be motorway standard from the M20 at Addington Interchange to the A41 at Hunton Bridge

In the South East

Two main options were looked at:

There were sit in protests on the A225 to get the new build route built. The lengthy detour required by the other option meant that the A225, which at that point was primary due to its purpose in linking the two Kentish bits of M25 together, would be used as a rat run, not being adequately bypassed.

In the North West

Various options were looked at:

Some options were not mutually exclusive, for instance the southern option, may have been paired with an M10 extension to Bignells Corner along the A405 and A6. Likewise both M1-A1 options may have happened, with the A1 route simply A1(M).

Northern Route Junction images


This is the layout of the M25 between J6-8 as it was in 1978


Orbit study

In 1989, the Orbit study looked at the M25 and the traffic on it. Upgrading parallel roads - eg A312, A331 and A404 - was recommended, and mostly carried out. Also recommended was a large amount of widening to D4M and further with collector-distributor roads. The study had this table of how wide the traffic would require the road to be: 1989 M25 Study - width predictions - Coppermine - 4167.PNG

Widenings opened

  • ??/??/85 J13-15 D4M
  • ??/??/90 J11-13 D4M
  • ??/??/95 J10-J11 D4M
  • ??/??/98 J15-16 D4M
  • ??/??/98 J7-10 D4M
  • Dec 2005 J12-14 D5M
  • Dec 2005 J14-15 D6M
  • ??/??/08 J2-3 D4M
  • Jul 2010 J16-18 D4M
  • Jun 2011 J18-21A D4M
  • May 2012 J21A-23 D4M
  • May 2012 J27-30 D4M
  • May 2014 J5-7 Managed Motorway
  • May 2014 J23-25 Managed Motorway (not turned on)
  • Autumn 2014 J25-27 Managed Motorway

Addlestone Interchange • Bignells Corner • Brentwood Interchange • Bricket Wood Junction • Brook Street Interchange • Chandlers Cross • Chevening Interchange • Chipstead Interchange • Chiswell Interchange • Chorleywood Interchange • Colnbrook Interchange • Cranham Interchange • Darenth Interchange • Denham Interchange • Denham Roundabout • Godstone Interchange • Hewitts Roundabout • Hunton Bridge • Iver Heath Interchange • Kings Langley Interchange • Leatherhead Interchange • M25 HS2 Works Access • Maple Cross Interchange • Mar Dyke Interchange • Merstham Interchange • Ockendon Interchange • Potters Bar Interchange • Poyle Interchange • Reigate Hill Interchange • Runnymede Interchange • Sarratt Interchange • Swanley Interchange • Terminal 5 Roundabout • The Bell Roundabout • Theydon Bois Interchange • Thorpe Interchange • Waltham Abbey Interchange • Waltham Cross Interchange • Westerham Interchange • Wisley Interchange
E15 • E30 • M25 • T5 Spur
Related Pictures
View gallery (350)
- Coppermine - 3914.jpgM25 roadworks 01 - Coppermine - 2300.jpgM25 D6M gantry.jpgM25 motorway - Geograph - 854292.jpgWelcome to the M25! - Geograph - 2101798.jpg

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