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TfL statement on the Hammersmith flyover

A continuing programme of inspection carried out by Transport for London (TfL) on
the A4 Hammersmith Flyover has revealed a serious structural defect, which means
that the flyover is currently closed and will remain so until at least early January.

Over the past two years, TfL has been carrying out detailed monitoring inside the
flyover, which dates from the 1960. In particular, TfL engineers have been checking
the condition of the internal cables which help to hold the spans of the unique
concrete structure in place. Until recently it was thought that the structure had a
number of years before major repair work would need to be undertaken. Recent
results from monitoring showed that repair work needed to be carried out earlier than
anticipated. However inspections, including one last night, identified further technical
problems – meaning that TfL has decided to keep the flyover closed to undertake an
even more detailed assessment of the complete structure.

TfL’s engineers and contractors, alongside external experts in structural engineering,
will be working around the clock over the Christmas and New Year period in order to
complete this assessment and to establish what remedial action needs to be taken.

Local traffic diversions are already in place, along with Variable Messaging Signs –
including on Highways Agency roads – advising drivers to avoid the area. TfL is
urgently examining local road works sites with a view to suspending these where
necessary to minimise traffic disruption. Traffic signal plans are being developed to
reduce disruption and ease traffic flow and plans are in place to divert traffic from the

M4 to other routes if necessary. TfL is also working closely with the relevant local

Garrett Emmerson, TfL’s Chief Operating Officer Surface Transport, said:

“Safety is our top priority, so we have taken the decision to keep the flyover closed
until at least early January while we undertake a full detailed assessment of the
structure. We are very sorry for the disruption this will cause drivers and we are
doing everything we can to minimise traffic disruption. We will be working around the
clock over the Christmas and New Year period to complete our assessment and to
set out plans for the work that needs to take place.

“In the meantime, drivers are strongly advised to avoid the area if they can or allow
more time for their journeys.”


TfL Press Office

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