Transport for London (TfL) will be carrying out essential maintenance work to the A40 Westway between the A40 Northern Roundabout and the Marylebone Road on weekends from the end of November through to Summer 2022, with the first closure in the eastbound direction to take place this weekend.
The A40 Westway is one of the busiest strategic routes on TfL's road network, normally used by nearly 100,000 vehicles a day.
To keep the A40 Westway and surrounding road network running safely and reliably, the works and associated road closures have been planned to avoid the busiest periods, with directional closures taking place at weekends.
The work, which is the first and most urgent of a range of works required on the flyover, will see some of the flyover's joints, which span the gaps between the concrete sections of the structure, replaced to ensure they remain safe.
The bridge deck will also be waterproofed to help protect the structure. To minimise the impact on nearby residents, TfL's contractor Costain will be using a special low-vibration method of concrete removal called hydro-demolition, which uses a high-pressure water jet to break down the concrete.
The A40 Westway will be closed eastbound from Friday 26 November 22:00 to Monday 29 November 05:00. Those travelling westbound will be able to use the A40 Westway as normal.
People using the A40 Westway to travel into London from the west are advised that it will be closed during this period. Local routes and the official diversion route are expected to be busy with journeys likely to be delayed.
TfL is advising those travelling into London over the Black Friday weekend (Friday 26 November to Monday 29 November) to plan ahead and use alternative methods of travel.
Nick Fairholme, Director of Projects and Programmes at TfL Surface, said: “The A40 is key artery in west London and it's vital that we ensure it is well maintained for the tens of thousands of people who use it each day.
“This essential work will replace an operationally critical roller shutter expansion joint and allow the flyover to continue to be used safely.
“Further work will be necessary given the age of the infrastructure, which we plan to carry out subject to the relevant funding. We'd urge people to plan ahead before their journeys, using alternative modes of transport where possible.”
There will also be eastbound closures ahead of the Christmas period from Friday 3 December 22:00 to Monday 6 December 05:00 and Friday 10 December 22:00 to Monday 13 December 05:00.