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
A century of motorways
It's 100 years since the opening of the world's first motorway, the Autostrada from Milan to the Lakes.
Schrödinger’s speed limit
In 2022, Manchester City Council say they reduced the speed limit on the Mancunian Way to 30mph. But it’s not clear if they did. It’s not even clear if they can.
Sorry, wrong number
Road numbering is a system with clear rules. What happens when the people responsible for numbering roads don't follow them?
Have you seen...
Above the M8
Go to Glasgow and it's almost inevitable that you'll use the M8. The views of the city surrounding it are really quite unique.
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