A40 Western Avenue - HS2 works

The A40 Western Avenue will be reduced to two lanes in each direction between Hanger Lane and Alperton Lane from Monday 27 May to the end of October 2024.

This is for work on a gas main as part of tunnelling work for HS2.  See the HS2 website for more information about it.

  • At busy times, there will be 2 lanes in both directions
  • On some nights, there will be 1 lane open in each direction from 22:00-05:00
  • On some nights, there will be full closures of the road in one direction (with diversions) from 00:00-05:00

There will be a temporary 20MPH speed limit through the roadworks from Thursday 27 June when the second phase of works begins on the gas main. The speed limit is being lowered for the safety of workers and will be enforced by the Metropolitan Police 

Expect long delays along the A40 and on the A406 on all approaches to the Hanger Lane gyratory. Local routes will be extremely busy.

Alternative routes

Consider alternative routes for a quicker and more comfortable journey:

  • If you are travelling east, into London, use the A312 The Parkway or the A406 North Circular and connect with the A4
  • If you are travelling west, out of central London, use the A205 South Circular or the A4

Overnight closures

The A40 will be closed in one direction from 00:00 to 05:00. All closures are between Sunday and Thursday nights only.  Signed diversions will be in place.

Eastbound closures between Target roundabout and Hanger Lane tunnel 

  • Tuesday 25 June 
  • Sunday 28 July 
  • Sunday 11 August 
  • Monday 23 September 
  • Thursday 17 October 

 Westbound closures between Hanger Lane Tunnel and Lynwood Road

  • Tuesday 25 June 
  • Monday 29 July 
  • Monday 12 August 
  • Tuesday 24 September 
  • Monday 21 October 

A40 Westway maintenance works

There is a major closure of the slip roads on/off the A40 at the Westway roundabout and the A3320 West Cross Route between 21 July and October 2024 - see our travel advice page.

Use our travel tools

Check before you travel and plan ahead using our travel tools. To keep up-to-date with the latest service information, see:

  • The latest status updates for buses and traffic
  • The latest status updates for Tube, rail and trams
  • The TfL Go app and Journey Planner, which can help you plan your route by public transport, cycling or walking
  • Nearby, which uses your current location or a postcode or address of your choice and places you on a map, showing you Tube, bus, rail and Santander Cycles locations around you
  • Our email updates