Road speeds and accidents

MQT on 2011-09-14
Session date: 
September 14, 2011
Question By: 
Valerie Shawcross
Labour Group
Asked Of: 
The Mayor


Do you believe that 20mph speed limits make the roads safer for cyclists and pedestrians alike?


Answer for Road speeds and accidents

Answer for Road speeds and accidents

Answered By: 
The Mayor

The introduction of 20mph speed limits can improve safety for all road users. Research by the School of Hygiene and Tropical Medicine found that 20mph zones have reduced casualties by up to 40% in locations where they have been implemented in London.

My Transport Strategy acknowledges the benefits of 20mph zones in making streets safer for pedestrians and cyclists. In addition, TfL looks to include lower speed limits as part of new scheme designs where appropriate. For example, as part of the implementation of new Cycle Superhighway 8, a 20mph speed limit has been introduced at Old York Road.

In considering the introduction of lower speed limits a number of factors need to be taken into consideration including potential safety benefits, the characteristics and function of the road in question, the impacts on traffic flow and the practicality and cost of implementation and enforcement. As such, the potential for new 20mph limits will vary by area and road type.