A303 Countess Roundabout

Layout and signage

Marlborough A354
Salisbury
Amesbury
A345
  A345
(A342)
    A345   Salisbury
Amesbury A345
Pewsey A345
Devizes (A342)

Lane configuration

LanesLanesLanesLanes

  • Lane 1 continues, with option to exit.
  • Lane 2 continues, with option to exit.

LanesLanesLanesLanes

  • Lane 1 continues, with option to exit.
  • Lane 2 continues, with option to exit.

Other events

  • Signs Traffic signals
  • Signs Traffic signals

In this section

What's new

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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.

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Have you seen...

Old Motorway Photos

A gallery of images sent in by visitors to the site of original photos of motorways — including some impressive views of the M4 and M11 under construction.

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