PARLIAMENTARY WRITTEN QUESTION
Speed Limits (20 December 2017)

Atkins, Aecom and Professor Mike Maher were commissioned by the Department for Transport in 2014, to address a gap in the evidence available on the effectiveness of 20mph speed limit (signed only) schemes. While there is evidence suggesting that 20mph zones are effective in reducing collisions and speeds (as well as leading to other benefits), there is an evidence gap on the effectiveness of 20mph speed limits (i.e. 20mph limits with no physical traffic calming measures). This research is in progress, and the Department expects to publish the final report in Spring-Summer 2018.