Roadworks Update - A4 Great West Road

Transport for London has announced road closures along the A4 Great West Road, as part of ongoing essential maintenance work.

Published: Friday, 23rd September 2022

pic of a road closed sign

Transport for London (TfL) are carrying out essential maintenance work on the Cromwell Road Railway Bridge, which carries the A4 Great West Road over the railway between Hogarth Roundabout and Chiswick Roundabout.

These works will mean sections of the road will face closures.

The works consist of three Phases, and they are scheduled to complete in December 2022.

Phase 1 began in early August 2022 and is now complete. To support ceremonial and commemorative events following the death of Her Majesty Queen Elizabeth II, works on Cromwell Road railway bridge were paused from 16 September after the completion of Phase 1 of the works.

Phase 2 works recommenced on Sunday 25 September as part of this phase.

The details are: Phase 2 details are as follows, TfL will work using lane restrictions and full directional overnight closures as per the updated table below:

A4 closures



Full westbound road closure between Chiswick Roundabout and Hogarth Roundabout

25 – 26 September (one night)

23 – 24 October (one night)

10pm - 5am 

Full eastbound road closure between M4 junction 3 and Chiswick Roundabout

26 – 27 September (one night)

10pm - 5am 

Eastbound: Two lanes open

Westbound: One lane open (traffic won't be able to join the A4 from Milnthorpe Road)

26 September – 23 October

24 hrs

These working hours have been agreed with between TfL and Hounslow. TfL will make every effort to finish the works on time, although poor weather conditions may mean they need to reschedule at short notice. If driving, please plan in advance and leave more time for your journey. Visit the TfL website to plan your journey.

Live TfL road travel updates

No buses will be on diversion during these works, but some journeys may take longer. Local journeys are likely to be quicker by foot or bike. Visit the TfL website for live bus updates.

Further details will be provided ahead of the third phase of works.

For the latest information on these works, please visit the TfL website for Great West Road road works.

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