Route
Junction number
None
Markerpost
Unknown
Name
Northway Circus
Type
Non-standard interchange
Terminus
Not a terminus
Other routes
A41, A5109
Authority
Restricted turns
Some turns restricted
Services
No services
A1 Northway Circus
Layout and signage
|
Watford Bushey Stanmore A41 Edgware East Barnet A5109 |
A41 A5109 |
|
A5109 |
Watford Bushey Stanmore A41 Edgware East Barnet A5109 |
Lane configuration
- Lane 1 exits and does not return.
- Lane 2 continues ahead.
- Then further along:
- Lane 1 is gained from the entry sliproad.
- Lane 2 is gained from the entry sliproad.
- Lane 3 continues, with option to exit.
- Lane 1 continues, with option to exit.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
- Then further along:
- Lane 1 continues ahead.
- Lane 2 exits and returns after the junction.
- Lane 3 exits and does not return.
Other events
Traffic signals
- Traffic signals
What's new
The road that made no sense
It was the UK's only single-carriageway motorway, and twenty years ago it ceased to exist. This is the story of the strange fascination it held, and of my place in history.
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.
Have you seen...
About this page
Published
Last updated
Published
Last updated
