A41 (M25 J20) Kings Langley Interchange

Layout and signage

N/A   M25











    A4251

M25













  Kings Langley A4251
Stansted Airport
(M1 Link, M11 Link)
M25 Link
London (NW & C)
Watford
A41
Heathrow Airport
(M40 Link, M4 Link)
M25 Link

Lane configuration

LanesLanesLanesLanes

  • Lane 1 continues ahead.
  • Lane 2 continues ahead.

LanesLanesLanesLanes

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

Other events

  • Signs Traffic signals

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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Have you seen...

Skelmersdale Link to M6

Bold plans and unrealised ideas for the New Town of Skelmersdale are set out with great ceremony and excitement in this book that marks the opening of a road that became the M58.

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