Route
Junction number
1
Markerpost
12.4
Name
Chiswick Roundabout
Terminus
Terminus at top of exit list
Other routes
A205, A315, A406
Authority
Restricted turns
Some turns restricted
Services
No services
M4 J1 Chiswick Roundabout
Layout and signage
|
Central London Hammersmith A4 |
A315 A406 |
 |
A205 |
N/A |
Lane configuration
- Lane 1 is gained from the entry sliproad.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
- Lane 1 exits and does not return.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
Other events
End of motorway regulations
40mph speed limit begins
Start of motorway regulations- 40mph speed limit begins
What's new
Skid Risk, Accident, Fog
For the first time, we can share pictures of the pioneering experiment that lit up the Worcestershire countryside with enormous signs 61 years ago.
All change
In July 2024, a new Government entered office with a very different set of priorities. What does it mean for a faltering roads programme?
A century of motorways
It's 100 years since the opening of the world's first motorway, the Autostrada from Milan to the Lakes.
Have you seen...
Clear and legible
A century ago, one short memorandum issued by the Ministry of Transport laid the groundwork for a system of standardised, uniform road signs and a great deal more.
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