We are continuing to work around the clock to complete these vital works as quickly as possible
Transport for London (TfL) will begin installing the new tensioning cables inside the Hammersmith Flyover next week, as part of its ongoing work to fully reopen the structure to all traffic.
The works, which began in January, have seen around 200m of the central reservation along the flyover removed, a new structural slab and concrete barriers installed, as well as tailored anchorages for the new cables installed within the structure.
The design for the new post-tensioning system will see new cables installed above and below the bridge deck as part of a bespoke design, which will supplement the load capacity of the existing cables.
The new cables are surrounded by wax oil to prevent deterioration and allow inspection and replacement if required in the future.
In order to install the new cables, the flyover will need to be fully closed overnight to ensure that there are no adverse forces applied to the structure while the cables are being tensioned.
These closures will be carried out overnight (22:00 - 06:00) for six weekday nights from Wednesday 18 April, when traffic levels are significantly lower and should not therefore result in additional traffic congestion.
There will also be two full weekend closures of the flyover to allow TfL to complete the installation of the tensioning cables, as well as begin work to waterproof and resurface the carriageway.
These will take place at the following times:
During this time, traffic will be diverted around the Hammersmith gyratory system. People are advised to consider alternative routes or using London Underground and National Rail services to complete their journey if possible.
Following these closures, TfL will continue to work around the clock to complete these works and fully reopen the flyover in June 2012.
Garrett Emmerson, Chief Operating Officer for Surface Transport at TfL said: "We are now approaching a critical phase in our race to reopen the Hammersmith Flyover as quickly as possible. This will require a number of overnight and weekend closures to ensure that the works are carried out safely and correctly.
"I would once again like to apologise for any inconvenience that this work is causing and reassure Londoners that we are continuing to work around the clock to complete these vital works as quickly as possible."
Work to strengthen the five weakest spans of the 16 span structure will be completed in June 2012, well ahead of the London 2012 Games. This will ensure that the flyover can carry full traffic loading during the Games and for many decades to come.
Following the Games, TfL will return to the structure to strengthen the remaining spans. This work will not require further weight restrictions to be imposed and TfL hope to complete it with off peak lane closures and minimal closures to the flyover, causing limited traffic disruption.
Notes to Editors: