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

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?

Devon help us

Road signs are colour coded for different types of road, but in Devon there are more colours than anywhere else. What do Devon's colourful signs mean?

Have you seen...

A470 End to End

The road that connects Wales together, but which nobody really uses... All five hours of the A470, from Llandudno to Cardiff, are here.