Route
Junction number
15
Markerpost
95.0 km
Name
Thorney Interchange
Type
Terminus
Not a terminus
Other routes
M4
Authority
Restricted turns
Full access
Services
No services
M25 J15 Thorney Interchange
Layout and signage
(T1, 2 & 3)
Lane configuration
- Lane 1 is gained from the entry sliproad.
- Lane 2 is gained from the entry sliproad.
- Lane 3 exits and returns after the junction.
- Lane 4 continues ahead.
- Lane 5 continues ahead.
- Lane 6 continues ahead.
- Lane 1 exits and does not return.
- Lane 2 exits and does not return.
- Lane 3 exits and returns after the junction.
- Lane 4 continues ahead.
- Lane 5 continues ahead.
- Lane 6 continues ahead.
Other events
Variable Speed Limits apply
- Variable Speed Limits apply
What's new
Where did the M25 come from?
London’s notorious orbital motorway turns 40 years old today. Where did it come from - and why the number “25”?
The long way round
When a road is closed, why isn't the diversion route just the quickest way past the closure?
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...
Rainbow Signals
The annual London Pride event was accompanied, in 2016, by some quite unusual changes to traffic lights around Trafalgar Square. The green men went missing — and seven new symbols took their place.
About this page
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