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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 Friday 26 September

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, Tue 30 Sep to Fri 3 Oct
  • Flyover eastbound closure, 22:30-05:00, Wed 1 Oct

Roads underneath the flyover

Hammersmith Bridge Road

  • Southbound lane closure, 21:30-05:00, Mon 29 Sep to Fri 3 Oct

Fulham Palace Road

  • Northbound road closure, 22:30-05:00, Mon 29 & Tue 30 Sep, Thu 2 and Fri 3 Oct
  • Southbound road closure, 22:30-05:00, Mon 29 to Fri 3 Oct

A4 Talgarth Road

  • Eastbound entry slip narrowing, ongoing
  • Westbound access road closure, ongoing
  • Westbound onto gyratory 2 lane closure, 21:30-05:00, Mon 29 Sep to Fri 3 Oct

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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