M42 J7A South Birmingham Joint

Layout and signage

      M6 Toll
(M6)


  London
Coventry
M6 Toll Link
(M6 Link)

Lane configuration

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  • Lane 1 continues ahead.
  • Lane 2 terminates.
  • Lane 3 terminates.
  • Lane 4 is gained from the entry sliproad.
  • Lane 5 is gained from the entry sliproad.
  • Lane 6 is gained from the entry sliproad.

LanesLanesLanesLanesLanesLanesLanes

  • Lane 1 is gained from the entry sliproad.
  • Lane 2 continues ahead.
  • Lane 3 continues, with option to exit.
  • Lane 4 exits and does not return.
  • Lane 5 exits and does not return.

Other events

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

In this section

What's new

The road that made no sense

It was the UK's only single-carriageway motorway, and twenty years ago it ceased to exist. This is the story of the strange fascination it held, and of my place in history.

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.

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British Roads FAQ

The most Frequently Asked Questions where British Roads are concerned, and the answers. A good place to start if you're new to the subject or you're looking for quick facts.

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