A14 J23 Ermine Street Interchange

Layout and signage

  A1198     A1198   St Ives
Royston
Godmanchester
A1198

Lane configuration

LanesLanesLanesLanesLanes

  • Lane 1 continues, with option to exit.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.

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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.

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Croydon Ring Road

Common sense suggests that you shouldn't be able to spend so much money on heavy engineering and end up with such a terrible road system.

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