Blackwall Tunnel

MQT on 2007-05-23
Session date: 
May 23, 2007
Question By: 
Bob Neill
GLA Conservatives
Asked Of: 
The Mayor


How many accidents involving vehicle collisions have there been in the southbound bore of the Blackwall Tunnel since the introduction of the tidal flow system? Of these, how many resulted in fatalities?


Answer for Blackwall Tunnel

Answer for Blackwall Tunnel

Answered By: 
The Mayor

The decision to withdraw tidal flow was made because the Police were no longer willing to operate the system. This was based upon consideration of EU guidance and a risk analysis that lead to the conclusion that its continued operation might lead to a serious accident within the tunnel that would have serious implications for the safety of the public and the fabric of the tunnel itself. Tidal flow operations first began in the Blackwall tunnel in 1978, so TfL is unable to provide accident statistics for the time since then. Statistics are available to show accidents in both bores of the tunnel over the last three years. This is the recognised time to allow for trend analysis to be carried out, without being too long for any environmental changes to have an effect on collision rates. Over the last three years up to 31 December 2006, there have 43 reported accidents resulting in personal injury within the tunnel and on the approach roads, of which there had been no fatalities.