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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 Monday 15 September

Hammersmith flyover (on deck and slip roads)

  • A4 Talgarth Road westbound off-slip lane closure, ongoing from Sunday 27 July
  • Flyover westbound closure, 22:30-05:00, Mon 15 Sep
  • A4 Great West Road westbound on-slip road closure, 22:30-05:00, Mon 15 and Tue 16 Sep
  • A4 Talgarth Road westbound off-slip road closure, 22:30-05:00, Mon 15 and Tue 16 Sep
  • Flyover eastbound closure, 22:30-05:00, Thu 18 Sep
  • A4 Great West Road eastbound off-slip road closure, A4 Talgarth Road eastbound on-slip road closure, 22:30-05:00, Fri 19 Sep

Roads underneath the flyover

Hammersmith Bridge Road

  • Northbound and southbound lane closure and Talgarth Road westbound onto gyratory 2 lane closure, 22:30-05:00, Fri 19 Sep

Fulham Palace Road

  • Northbound and southbound road closures, 22:30-05:00, Mon 15 to Fri 19 Sep

Queen Caroline Street

  • Road closure and central/eastern access road closures, 22:30-05:00, Mon 15 to Fri 19 Sep

A4 Talgarth Road

  • Eastbound entry slip narrowing, ongoing
  • Westbound off-slip lane closure, ongoing



        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 will start being installed from August 2014 and, later this year, steel bearings within the structure will also be replaced.


        The Hammersmith flyover project is part of the Structures and Tunnels Investment Portfolio (STIP) our programme to ensure that London's road network is well maintained and in good condition for all road users.

        Find out about STIP on our roads investment page.

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