What we are doing

We are replacing the Power Road Bridge as part of our programme to improve London's roads and public spaces.

The bridge, which was built in 1922, has reached the end of its operational life and is beyond simple repair. Not replacing the bridge would mean permanent closures of footway and cycle tracks, lane closures and restrictions on the type or weight of vehicles that use the bridge.


The new structure replacing the existing bridge has been designed to last at least 120 years.

The new bridge will have improved footways, lighting and better facilities for cyclists on the western side, making this section of the A406 safer for all users.

Planned works

The main highway works are nearly complete on Power Road Bridge.

Construction activity will continue on the bridge's replacement in 2019 while we finish rebuilding footways, cycle tracks and verges on both sides of the road.

  • From Friday 15 February to Wednesday 20 February 2019 we will resurface the pavement and existing cycle track on the western side of the road. A single northbound lane of the A406 will be closed outside of peak traffic hours (between 09:30 and 16:30) so materials can be be safely delivered to site
  • From Monday 11 March to Monday 25 March 2019 we will rebuild the pavement on the eastern side of the road. A single southbound lane of the A406 will be closed at all times during this time. The road will stay open in both directions - two lanes open southbound and one lane open northbound

Final works, including work to the underside of the bridge and railway embankments which may not be visible from street level, are scheduled for summer 2019.

How your travel might be affected

The A406 Gunnersbury Avenue is open in both directions. Some lane restrictions apply during February and March 2019 - see Planned works above for details.

A temporary 30mph speed restriction is in place between the Chiswick Roundabout and Park Place Drive.

Check live traffic news before you leave to stay up-to-date and avoid disruption to your journey.

Get the latest travel information by following @TFLTrafficNews on Twitter.


Bus route 440 serving Stop D (Power Road) may be affected by increased traffic in the area surrounding Power Road.

Check live bus service updates before you leave.

Get the latest updates by following @TfLBusAlerts on Twitter

Pedestrians and cyclists

Access for pedestrians and cyclists will be maintained across the bridge at all times. Any temporary changes will be clearly signed.

The service bridge has been converted into a temporary footbridge which pedestrians and cyclists can use to cross the railway. For the safety of both cyclists and pedestrians, cyclists must dismount and walk across the temporary footbridge.

Minimising noise and disruption

Normal working hours are 07:00 to 19:00 on weekdays and Saturdays. Some works will take place on Sundays and Bank Holidays. All working times are agreed with London Borough of Hounslow.

To reduce noise, vibration and disruption during the works we are using a range of measures including:

  • Compressors and generators fitted with acoustic covers
  • Acoustic barriers
  • Specialist sheet piling rigs to reduce noise
  • Turning off plant and equipment when not in use
  • Dust levels monitored on a daily basis
  • Water sprays used to reduce airborne dust
  • Taking steps to ensure lights do not shine into homes
  • Noise and vibration monitoring

We will also have recycling skips on site to ensure we recycle everything we can.

Local residents and businesses will be updated about the works.

Our partners

We are delivering this project in partnership with Hochtief (UK) Construction, Ramboll and Parsons Brinckerhoff, and Skanska UK.

We are working closely with Network Rail, the London Boroughs of Hounslow and Ealing and the emergency services to minimise disruption and ensure the works proceed as safely, efficiently and as quickly as possible.