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
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The forever bottleneck, part 1
The M4 into London was one of the UK's earliest and most ambitious motorway projects. It was bold, pioneering... and almost instantly regretted.
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An introduction to what I write, and why I write it, and where my strange new road sign simulator fits in to all this.
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About this page
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Published
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