Mayor of London

Hammersmith flyover

Hammersmith flyoverHammersmith flyover

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. Work to upgrade the central reservation is now complete, with strengthening to the structure fully under way.

The work forms part of the Road Modernisation Plan. Consisting of hundreds of projects to transform junctions, bridges, tunnels and pedestrian areas, it is the biggest investment in London's roads for a generation.

For full information on how it might affect your journey, see our Hammersmith Flyover travel advice page.

Latest travel update (Fri 3 Jul)

Hammersmith flyover (on deck and slip roads)

  • Hammersmith Flyover eastbound road closure, 22:30-05:00, Mon 6, Tue 7, Wed 8, Thu 9, Fri 10, Sat 11 and Sun 12 Jul
  • Hammersmith Flyover westbound road closure, 22:30-05:00,  Sat 4 and Sun 5 Jul; 23:59-05:00, Mon 6, Tue 7, Wed 8 and Thu 9 Jul; 22:30-10:00, Sat 11 into Sun 12 Jul
  • A4 Talgarth Road westbound off-slip lane closure, 24/7 ongoing

    Roads underneath the flyover

    Fulham Palace Road

    • Southbound road closure, 22:30-05:00, Mon 6, Tue 7, Wed 8 and Thu 9 Jul; 23:59-05:00 Fri 10 Jul

    Centre Access Road

    • Road closure, 22:30-05:00,Mon 6, Tue 7, Wed 8, Thu 9 and Fri 10 Jul

    Eastern Access Road

    •  Road closure, 22:30-05:00, Mon 6, Tue 7, Wed 8, Thu 9 and Fri 10 Jul

    Hammersmith Bridge Road

    • Northbound road closure, 22:30-05:00, Mon 6 Jul
    • Southbound road closure, 22:30-05:00, Tue 7 Jul
    • Northbound and southbound lane closures, 21:30-05:00, Mon 6, Tue 7, Wed 8, Thu 9 and Fri 10 Jul

      Queen Caroline Street

      • Road closure, 22:30-05:00, Thu 9 and Fri 10 Jul

          Talgarth Road

          • Westbound onto gyratory 2 lane closure, 21:30-05:00, Mon 6, Tue 7, Wed 8, Thu 9 and Fri 10 Jul
          • Eastbound entry slip narrowing, 24/7 ongoing

          Western Access Road

          • Road closure, 24/7 ongoing

                      How your travel may be affected

                      Hammersmith jacking night time works

                      Frequent night time closures will continue until summer 2015 to enable strengthening activities to continue. During these closures the flyover will be closed to traffic in both directions between 22:30 and 05:00.

                      These closures will allow us to safely lift the flyover and replace the bearings. During each closure we lift approximately 2,500 tonnes of the flyover and work to install new bearings.

                      Drivers who would ordinarily use the flyover should follow the signed diversion via the A40.

                      Research during previous closures of the flyover showed that drivers using the signed diversion via the A40 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.