A406

Route

A406

Junction number

None

Markerpost

Unknown

Name

Unknown

Type

Diamond

Terminus

Not a terminus

Other routes

None

Authority

Transport for London

Restricted turns

Full access

Services

No services

Layout and signage

Harrow
Wembley
Harlesden
A404
  A404     A404   Harrow
Wembley
Harlesden
A404

Lane configuration

LanesLanesLanesLanesLanes

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

LanesLanesLanesLanesLanes

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

Other events

  • Signs 50mph speed limit begins
  • Signs 40mph speed limit begins

In this section

What's new

Gifts for road lovers

Keep being asked what you want for Christmas? No problem: here’s our pick of road-related Christmas treats for 2021.

Go west! New Ringways pages are here

A new set of Ringways pages are now online, looking at unbuilt motorways and road projects west of London.

No smoke without ire

London's Ultra Low Emission Zone has just expanded to cover the whole inner city, and across the UK, other cities are implementing their own Clean Air Zones. Is this the future?

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Have you seen...

Driver Location Signs

If you're on the motorway (in England at least) you might have noticed some funny blue signs down the side of the road. What are they for?