Silvertown Tunnel (5)

MQT on 2014-11-19
Session date: 
November 19, 2014
Question By: 
Caroline Pidgeon
Liberal Democrats
Asked Of: 
The Mayor


TfL says the Silvertown Tunnel scheme is about providing resilience for when the Blackwall Tunnel is closed. If TfL builds the Silvertown Tunnel, what measures will it take to address resilience on the A102, which risks becoming a weaker link in London's road network if the new tunnel is built?


Answer for Silvertown Tunnel (5)

Answer for Silvertown Tunnel (5)

Answered By: 
The Mayor

Overwhelmingly, issues of resilience experienced on the A102 relate to the significant issues experienced at the Blackwall Tunnel, which is closed around 1,000 times each year. Most closures relate to the attempted use of the northbound bore by vehicles which exceed its height limit. The Silvertown Tunnel scheme would reduce the frequency of these closures by providing a full-sized crossing immediately adjacent to the existing tunnel.

The new crossing would also help minimise the effects of any kind of incident, enabling traffic to divert to avoid an obstruction in either tunnel.

The Silvertown Tunnel would also improve network resilience during planned closures such as for essential maintenance. Currently the lack of alternative crossings makes maintenance of the Blackwall Tunnel extremely difficult, and periodic closures (of a matter of days or weeks) are likely to continue to be required. The operational flexibility provided by the Silvertown Tunnel would allow for planned maintenance closures of either tunnel at regular intervals.  A full height Silvertown Tunnel would also enable TfL to run double decker buses through the tunnel.  At present only one single decker bus route crosses the river to serve the east.