Route
Junction number
M4 J24
Markerpost
0.0 km
Name
Coldra Interchange
Terminus
Terminus at end of exit list
Other routes
M4, A48, B4237
Authority
Restricted turns
Full access
Services
No services
A449 (M4 J24) Coldra Interchange
Layout and signage
Lane configuration
- Lane 1 continues ahead.
- Lane 2 continues ahead.
- Lane 1 continues, with option to exit.
- Lane 2 exits and does not return.
Other events
National Speed Limit begins
40mph speed limit begins
Traffic signals
What's new
The forever bottleneck, part 2
The second part of the story, where we learn why exactly the M4 gets narrower on the final approach to Europe’s biggest city.
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.
Hello, here's my ridiculous side project
An introduction to what I write, and why I write it, and where my strange new road sign simulator fits in to all this.
Have you seen...
Scammonden Bridge
If you've ever been on the M62 across the Pennines, you'll know the one. It's the huge arched bridge 120ft above the road. And this is what it's like when you're standing on top of it!
About this page
Published
Last updated
Published
Last updated
