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Mayor of London

Hammersmith flyover

Hammersmith flyoverHammersmith flyover

This final phase of strengthening the Hammersmith flyover follows on from repairs made in early 2012. Completed in 1961, the Hammersmith flyover carries the four-lane A4 arterial road over the Hammersmith gyratory and links the west to central London.

Strengthening the flyover will prolong its life and mean no major maintenance will be required for many years, ensuring this vital part of the road network can continue serving London for years to come. Work to upgrade the central reservation is now complete, with strengthening to the structure now fully underway.

Latest travel updates

Updated Thursday 18 December

Hammersmith flyover (on deck and slip roads)

  • A4 Talgarth Road westbound off-slip lane closure, ongoing from Sunday 27 July
  • A4 Talgarth Road westbound off-slip road closure, 22:30-05:00, Fri 19 Dec
  • Full closure in both directions, 22:30-05:00, Thu 18 Dec
  • Eastbound road closure, 22:30-05:00, Mon 22 Dec

Roads underneath the flyover

Hammersmith Bridge Road   

  • Northbound road closure, 22:30-05:00, Thu 18 and Fri 19 Dec
  • Southbound lane closure, 21:30-05:00, Thu 18 and Fri 19 Dec

Central and eastern access roads (turning into the gyratory)

  • Closed, 22:30-05:00, Thu 18 and Fri 19 Dec

Queen Caroline Street

  • Road closure, 22:30-05:00, Thu 18 and Fri 19 Dec

A4 Talgarth Road

  • Eastbound entry slip narrowing, ongoing
  • Westbound access road closure, ongoing
  • Westbound onto gyratory 2 lane closure, 21:30-05:00, Thu 18 and Fri 19 Dec

Fulham Palace Road

  • Northbound road closure, 22:30-05:00, Thu 18 and Fri 19 Dec
  • Southbound road closure, 21:30-05:00, Thu 18 and Fri 19 Dec

Bus station road

  • Northbound lane into bus station closure, Thu 18 and Fri 19 Dec

 

     

        How your travel may be affected

        From late November until summer 2015, we will begin frequent full night time closures of the Hammersmith flyover to enable certain strengthening activities to continue. During these closures, the flyover will be closed to traffic in both directions between 22:30-05:00.

        These closures will allow us to safely jack (lift) the flyover and replace the bearings. During each closure, we will be lifting 2,500 tonnes weight of the flyover and working to install new bearings. The closures are essential to carry out this work safely and quickly.

        Drivers who would ordinarily use the flyover are advised to follow the signed diversion via the A40 and to take this route at the earliest opportunity in their journey.

        Monitoring of network performance during previous closures of the flyover showed that at most times, drivers using the signed diversion via the A40 have experienced less delay than those travelling on the A4 Great West Road through the Hammersmith gyratory.

         

         

        Why are we doing the work?

        In December 2011, structural investigations revealed that steel cables on a number of the flyover's 16 spans had deteriorated significantly, due to corrosion caused by water seeping into the structure.

        We carried out urgent strengthening work on the worst-affected spans, and now need to strengthen the remaining spans and undertake essential planned maintenance.

        The first of the new strengthening cables was installed in August 2014, and we are now working to install the new bearings.