M25 J15 Thorney Interchange

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