School of Health in Social Science

20mph Project

This study examines the impact of 20mph speed limits on safety and public health.

Rates of traffic accidents and injuries before and after the change will be measured to look at whether road safety has been enhanced. Any change in transport use will also be scrutinised by examining the take-up of cycling and walking. Residents will also be asked their opinions of the change. It is the largest project of its kind in the UK and will run until 2020.


The IT team at the University of East Anglia UEA have developed a short animation explaining the 20mph project. Thanks to Dr Karen Milton for co-ordinating the animation, and to Dr Ruth Hunter for providing the narration




The study is funded by the National Institute for Health Research and involves partnership with other UK Universities, NHS Health Scotland, and the charity Sustrans

Project Team

The research team, led by the University of Edinburgh and SCPHRP are: Dr Ruth Jepson, Dr Glenna Nightingale, Kieran Turner (SCPHRP) Dr Paul Kelly and Dr Graham Baker (University of Edinburgh) Dr Ruth Hunter, Dr Claire Cleland, Prof Frank Kee (Queens University Belfast) Dr Andy Cope (Sustrans) Dr Andrew J Williams (University of Exeter) Karen Milton (University of East Anglia) Prof Mike Kelly, Dr James Woodcock (University of Cambridge) Neil Craig (NHS Health Scotland) Dr Charlie Foster (University of Bristol)

For further information about the 20MPH project, please contact Dr Glenna Nightingale at