Route
Junction number
20
Markerpost
186.5 km
Name
Almondsbury Interchange
Type
Terminus
Not a terminus
Other routes
M5
Authority
Restricted turns
Full access
Services
No services
M4 J20 Almondsbury Interchange
Layout and signage
Lane configuration
- Lane 1 exits and does not return.
- Lane 2 continues ahead.
- Lane 3 continues ahead.
- Then further along:
- Lane 1 is gained from the entry sliproad (part time using the hard shoulder).
- Lane 2 is gained from the entry sliproad.
- Lane 3 continues ahead.
- Lane 4 continues ahead.
- Lane 1 exits and does not return (part time using the hard shoulder).
- Lane 2 exits and does not return.
- Lane 3 continues ahead.
- Lane 4 continues ahead.
Other events
Variable Speed Limits apply
National Speed Limit begins
What's new
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Signs and sensibility
The one great attempt to make London’s streets logical - and how one retired chauffeur’s favourite routes changed the way you get around the capital.
Have you seen...
The Magic Roundabout
Officially the seventh most frightening thing on the road network - but actually it might just be the most efficient junction ever designed.
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