A4 Roadworks Expected To Cause Severe Congestion in Chiswick

Maintenance of rail bridge near Harvard Hill to continue until end of year

The bridge over the rail tracks on the A4 which needs repairing. Picture: Google Streetview

Transport for London (TfL) is warning of significant extra traffic congestion in the Chiswick area because of works that will be taking place on the Great West Road (A4) near Harvard Hill.

From 5 August until the end of the year TfL contractors will be carrying out essential maintenance and refurbishment works on the bridge over the railway line that runs between Gunnersbury and Kew Gardens. This bridge is officially known as the Cromwell Road Railway Bridge and is in the section between Hogarth Roundabout and Chiswick Roundabout.

The work will begin with a full overnight closure of the A4 westbound between Hogarth Roundabout and Chiswick Roundabout on 5 August and then, the following day, just one lane of the A4 westbound will be open on this section until 15 September. Later in the project there will be a full overnight closure of the eastbound road from Junction 3 of the M4 to Chiswick Roundabout and more full westbound closures between Chiswick Roundabout and Hogarth Roundabout.

TfL says that these works will improve the long-term condition of the bridge, road and pavements and will avoid the need for more disruptive and expensive repairs at a later date.

The work will require a full closure of the road in one direction on occasions and, more regularly closure of traffic lanes. All full directional closures will take place overnight or at weekends. On weekdays, there will be at least one lane open for traffic in both directions at all times.

Location of the works

The works will be completed in three phases and to prepare for each phase of work, there will be overnight directional closures, to install and remove traffic management.

Phase 1 - 5:00am 6 August to 10pm 15 September

Eastbound: no closures

Westbound: 1 lane open

Traffic will not be able to join the A4 Great West Road from Milnthorpe Road.

Phase 2 - 5:00am 17 September to 10pm 12 October

Eastbound: 2 lanes open

Westbound: 1 lane open

Traffic will not be able to join the A4 Great West Road from Milnthorpe Road.

Phase 3 - 5am 14 October to 10pm 25 November

Eastbound: 2 lanes open

Slip road to join the A4 eastbound at Chiswick roundabout will be closed. There will be a diversion route to Hogarth Roundabout

Traffic will not be able to join the A4 Great West Road from the following roads and will need to join the A4 at Hogarth roundabout (eastbound and westbound), or at Chiswick roundabout (westbound only):

  • Milnthorpe Road
  • Palladian Gardens
  • Sutherland Road
  • Park Road
  • Eastbourne Road
  • Harvard Hill

Westbound: No closure

Weekend directional closures

Following phase 3, there will be 2 weekend full eastbound closures between M4 junction 2 and Hogarth Roundabout. These closures will run from 11am on Friday to 5pm on Monday on the following dates:

Friday 25 November and Monday 28 November
Friday 2 December and Monday 5 December
Signed diversion routes will be in place for local traffic.

Overnight directional closures

There will be overnight closures eastbound between M4 junction 3 and Chiswick Roundabout and westbound between Chiswick Roundabout and Hogarth Roundabout.

Closures will run from 10pm until 5:00am the next day (except on 16 September).

There will be closures on these dates:

5 August: westbound
15 September: westbound
16 September: westbound closure from 11pm
12 October: westbound
13 October: Eastbound

Signed diversion routes will be in place.

If needed, there will be full directional closures with signed diversions on these weekends:

From 11pm Friday 9 December to 5am Monday 12 December
From 11pm Friday 16 December to 5am Monday 19 December

During the works TfL advises using the A40 Westway and M40 to travel between Central London and the M25.

If you have to use this part of the A4 Great West Road, allow more time for your journey and travel at quieter times if possible.

Pavements will be closed on the following dates:

5 September-15 September pavement closed on westbound carriageway side, between Harvard Hill and Oxford Road South

13 November-25 November pavement closed on eastbound carriageway side between Oxford Road North and Harvard Hill

There will be signed diversion routes via the subway at Harvard Hill and the underpass on Wellesley Road. TfL says there will be staff around to help people walking at all times.

No buses will be on diversion during these works but some buses may experience local delays, especially at busier times.


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July 24, 2022