Transport for London (TfL) is to introduce a “safety-critical” 18 tonne weight restriction on Vauxhall Bridge from July, after it failed to find the cash to do “top priority” renewal works that Heidi Alexander deferred in 2018.
It said the restriction follows a recent assessment that showed that elements of the structure had “recently” deteriorated and that it has “a lower weight-bearing capacity than previously assessed”.
While emergency vehicles and buses will be exempt from the restriction, the 0.5% of current traffic that is above 18 tonnes will be required to use a signed diversion.
The weight restriction will remain in place while TfL works to resolve the problems as quickly as possible and continues to develop a long-term plan for the bridge
The issue with these structures, as with the original Severn Bridge, is not individual (ordinarily) heavy vehicles, but the risk that too many will be on the bridge at the same time.

The imposition of such restrictions has been on the cards since TfL postponed planned renewals work on the bridge in 2018, estimated at the time to cost £40-70m.
This was part of a “two-year pro-active renewals freeze”, which included the deferral of major proactive renewals on London’s roads, as described in this paper to TfL’s Programmes and Investment Committee.
Attending the meeting as deputy mayor for transport was Heidi Alexander, now transport secretary.
The paper noted:









