Route
Junction number
21A
Markerpost
123.8 km
Name
Bricket Wood Interchange
Terminus
Not a terminus
Other routes
A405
Authority
Restricted turns
Full access
Services
No services
M25 J21A Bricket Wood Interchange
Layout and signage
Lane configuration
- Lane 1 exits and does not return.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
- Lane 4 continues ahead.
- Lane 1 is gained from the entry sliproad.
- Lane 2 continues, with option to exit.
- Lane 3 continues ahead.
- Lane 4 continues ahead.
Other events
Variable Speed Limits apply
- Variable Speed Limits apply
What's new
The sunlit uplands
On Saturday 31 May something historic happened. The Heads of the Valleys Road was finally complete.
Grand openings
Our much-loved Opening Booklets section has two new publications for you to explore, and we’re making some overdue changes to make them easier to find and easier to read.
Silver bullet
The Silvertown Tunnel is finally open for business. One question remains: what’s it for?
Have you seen...
Studland Motor Road
The first motorway opened in 1958. The first road restricted to motor traffic, on the other hand, opened in 1923...
About this page
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Last updated
Published
Last updated
