M25 J15 Thorney Interchange

Route

M25 and A282

Junction number

15

Markerpost

95.0

Name

Thorney Interchange

Terminus

Not a terminus

Other routes

M4

Authority

National Highways

Restricted turns

Full access

Services

No services

Layout and signage

The WEST
Slough
Reading
London (W)
Heathrow Airport (T1, 2 & 3)
M4 Link
  M4     M4   The WEST
Slough
Reading
London (W)
Heathrow Airport (T1, 2 & 3)
M4 Link

Lane configuration

LanesLanesLanesLanesLanesLanesLanesLanes

  • 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.

LanesLanesLanesLanesLanesLanesLanesLanes

  • 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

  • Signs Variable Speed Limits apply
  • Signs Variable Speed Limits apply

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Opening booklets

In days gone by, new roads were often celebrated with a grand opening ceremony and the issue of a commemorative booklet heralding the exciting new highway. You'll find some of them here, complete with a glimpse of all that empty tarmac and a healthy dose of modernist optimism.

About this page

Published22 April 2017

Last updated3 May 2022