M4 J8/9 Holyport Interchange

Layout and signage

High Wycombe
A404(M) Link
Maidenhead
A308(M) Link
  A308(M)

A404(M)
      High Wycombe
A404(M) Link
Maidenhead
A308(M) Link

Lane configuration

LanesLanesLanesLanesLanesLanes

  • Lane 1 exits and returns after the junction.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.
  • Lane 4 continues ahead.

LanesLanesLanesLanesLanesLanes

  • Lane 1 exits and returns after the junction.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.
  • Lane 4 continues ahead.

Other events

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

In this section

What's new

Where did the M25 come from?

London’s notorious orbital motorway turns 40 years old today. Where did it come from - and why the number “25”?

The long way round

When a road is closed, why isn't the diversion route just the quickest way past the closure?

Signs and sensibility

The one great attempt to make London’s streets logical - and how one retired chauffeur’s favourite routes changed the way you get around the capital.

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Have you seen...

Roundabouts

The UK has been driving in circles for a hundred years now, and this humble road junction has become part of British culture. Just what is so special about roundabouts?

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