A23 Patcham Interchange

Layout and signage

N/A   A27





    A27





  Lewes
Newhaven A27
Worthing
A27
Brighton A23

Lane configuration

LanesLanesLanesLanesLanes

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

LanesLanesLanesLanesLanes

  • Lane 1 exits and does not return.
  • Lane 2 continues ahead.
  • Lane 3 continues, with option to exit.

Other events

  • Signs National Speed Limit begins
  • Signs 50mph speed limit begins

In this section

What's new

The monster seen from below

What might it have been like to stand in one spot and witness the arrival, and the uncertainty, of plans for an urban motorway in West London?

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.

Share this page

Have you seen...

Mancunian Way

Manchester's highway in the sky, carrying traffic around the city centre and rapidly becoming an iconic part of the city's heritage.

About this page

Published

Last updated