Route
Junction number
3
Markerpost
22.0 km
Name
Cranford Parkway Interchange
Terminus
Not a terminus
Other routes
A312
Authority
Restricted turns
Full access
Services
No services
M4 J3 Cranford Parkway Interchange
Layout and signage
Heathrow  Harrow Hounslow A312 |
A312 | 
|
A312 |
Heathrow T4 & Cargo Feltham Hayes A312 |
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
60mph speed limit begins
Variable Speed Limits apply
What's new
The Ringways Map is here
The wait is over! The full map of the Ringways, London’s unbuilt urban motorway network, is now online. Not even the system's planners had anything like this.
Red, white and blue
Kent County Council is run by eurosceptic nationalists. So why are they putting EU flags on their road signs?
The sunlit uplands
On Saturday 31 May something historic happened. The Heads of the Valleys Road was finally complete.
Have you seen...
Rainbow Signals
The annual London Pride event was accompanied, in 2016, by some quite unusual changes to traffic lights around Trafalgar Square. The green men went missing — and seven new symbols took their place.
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