M1 J6A Chiswell Interchange

Layout and signage

  M25
(M3)
(M4)
(M40)
    M25
(M11)
(M20)
  Stansted Airport (M11 Link)
Dartford (M20 Link)
Heathrow Airport
(M40 Link, M4 Link, M3 Link)
M25 Link

Lane configuration

LanesLanesLanesLanesLanesLanes

  • Lane 1 is gained from the entry sliproad.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.
  • Lane 4 continues ahead.

LanesLanesLanesLanesLanesLanes

  • Lane 1 exits and does not return.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.
  • Lane 4 continues ahead.

Other events

  • Signs Variable Speed Limits apply
  • Signs National Speed Limit begins

In this section

What's new

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.

Hello, here's my ridiculous side project

An introduction to what I write, and why I write it, and where my strange new road sign simulator fits in to all this.

Share this page

Have you seen...

Warrington New Town

New Towns are fascinating places socially and architecturally - and, of course, in terms of roads. This article explores one example from start to finish.

About this page

Published

Last updated