Power Road Bridge

What we are doing

We will replace the bridge deck which sits beneath the carriageway and strengthen the abutments which support the bridge from below.

The bridge has reached the end of its operational life and is beyond simple repair. Not replacing the bridge would mean restricting the weight of vehicles that use the bridge and closing lanes to carry out maintenance, causing considerable disruption to traffic and rail operations in the long term.

We are investing around £35m to rebuild the Power Road Bridge. The works are part of our Road Modernisation Plan.

Key phases of the work

The project is divided into three phases:

  • Preparation and installation of a utilities service bridge (May to July 2016)
  • Diversion of utilities into the service bridge (from July to December 2016)
  • Highway bridge deck demolition and replacement works: The main bridge replacement works are scheduled from December 2016 to December 2017

Current works

Our contractor Hochtief (UK) installed the new service bridge in July 2016.

Works are now going on to divert utilities from the existing carriageway to the new service bridge.

A single lane closure will be in place on the A406 North Circular Road (Gunnersbury Avenue) northbound until mid-November while we carry out these works.


The new structure replacing the existing bridge will have an expected design lifespan of 120 years.

Utilities (gas, electricity, water and telecommunications) in the existing carriageway will be relocated to a new service bridge. This will reduce the need to close traffic lanes on the road bridge during future maintenance of utility pipes or cables.

The new bridge will have wider footways and better facilities for pedestrians and cyclists making this section of the A406 safer for all users.

How your travel might be affected

Vehicle access to the A406 (Gunnersbury Avenue) bridge will still be possible from both directions during the works. A temporary 30mph speed restriction is in place.

Some temporary lane restrictions will be required during the works.

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

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

Pedestrians and cyclists

At all times during the works we will ensure there is a safe route for pedestrians to cross the railway.

The footway on the western side of the bridge has been closed since the works started. Pedestrians should follow the signed diversion route on the eastern side of the bridge via the footbridge next to Princess Avenue.

During the works, pedestrians and cyclists might have to share the same space on the eastern side of the bridge. Cyclists are reminded to be considerate to pedestrians.

Minimising noise and disruption

Preparation works are now underway for replacement of the main bridge. We are working increased hours, from 07:00 to 19:00 on weekdays and some Saturdays, Sundays and bank holidays.

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

  • Compressors and generators fitted with acoustic covers
  • Specialist sheet piling rig 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

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

Local residents and businesses will be updated on the works.

Our partners

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

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.

Contact us

Phone detailsPhone: 0343 222 1234 (24 hours)

(TfL call charges)

Call us if you have questions or comments about the scheme

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