Route
Junction number
12
Markerpost
45 km
Name
Hilsea Interchange
Type
Non-standard interchange
Terminus
Not a terminus
Other routes
M275, A27
Authority
Restricted turns
Some turns restricted
Services
No services
M27 J12 Hilsea Interchange
Layout and signage
M275 |
|
(A27) |
Hilsea Cosham A27 Portsmouth Continental Ferry  M275 Link |
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.
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...
Hogarth Flyover
It makes the traffic situation in one part of West London much more bearable but it should have been removed more than quarter of a century ago. It's amazing what you can do with a big Meccano kit.
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