Speed cameras on the A40

MQT on 2013-05-22
Session date: 
May 22, 2013
Question By: 
Murad Qureshi
Labour Group
Asked Of: 
The Mayor


TFL recently notified me of a proposal to fit an Average Speed Camera along the A40 between Swakeleys roundabout and Paddington GreenSlip Road. The intention is to meet the new Road Safety Action Plan targets. Can you please set out:

(a) How many accidents per year along this stretch result in people being killed and seriously injured (KSI) and (b) What effect the introduction of similar cameras in nearby areas has had on reducing the number of KSIs in percentage terms?


Answer for Speed cameras on the A40

Answer for Speed cameras on the A40

Answered By: 
The Mayor

Officers are drafting a response which will be sent shortly.

Written response received on 1 July 2013.

TfL is currently replacing all the obsolete wet film safety cameras in London with digital alternatives. As part of this process, average speed cameras are being considered in a small number of limited locations due to the additional safety benefits. However, no firm decision has yet been made and no formal consultation on these proposals has been undertaken.

One of the locations under consideration is the A40 between the Polish War Memorial and Paddington Green Slip road. In the last three years along this route, 65 collisions have occurred that resulted in people being killed or seriously injured (KSI collisions). Seven locations along this route have spot speed cameras installed. At these locations, there were 34 KSI collisions three years before cameras were installed, reducing to 11 in the last three years after cameras were installed. The remaining 54 KSI collisions along the route occurred where no safety camera is present.

An average speed camera system was installed on the A13 in 2010, replacing existing wet film spot speed cameras. While KSIs are usually monitored on a rolling three year basis, initial monitoring data shows, that during the 18 month period following the A13 installation, total KSIs reduced by ten (58 per cent); with seven KSIs occurring, compared to 17 KSIs which occurred in the 18 months prior to installation of the average speed camera system.

TfL would expects a similar level of performance from any new system on the A40, which could reduce KSIs by 31 over three years.