20 MPH study 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 research team, led by the University of Edinburgh and SCPHRP, hopes the project will inform other cities planning to introduce lower speed limits. It is the largest of its kind in the UK and will run until 2020. SCPHRP’s Ruth Jepson said: “We are excited about this major project, which we hope will provide very important insights into the public health effects of such initiatives“.

Resources Reports and more…

ARTICLE: Edinburgh News.

Monday 14 October 2019 Edinburgh’s 20mph policy has made our city a better place. Fact – Adam McVey

On the committee agenda was the review of the 20mph rollout amongst a range of other issues. It was personally encouraging, as one of the two principle politicians who delivered this policy, to see the positive impacts of the policy on our Capital.

Post-implementation we’ve seen more people cycling and walking, significant reduction of accidents and more support for the policy in our communities. Read more…


INTERVIEW: An interview with Prof Ruth Jepson on twitter 

Thursday 10 October 2019 Evaluation shows positive impact of 20mph in Edinburgh

A report evaluating the Council’s pioneering roll-out of 20mph speed limits across Edinburgh has concluded that the project’s aims and objectives are being broadly met. Read more here




Article in The Edinburgh Reporter: City Council Evaluates Impact of 20mph Zones

An evaluation report has concluded that the Council’s pioneering roll-out of 20mph speed limits across Edinburgh has broadly met the project’s aims and objectives. The report also recommends beginning the process to add further roads to the 20mph network.

Read more.



Other related information


ANIMATION: A short animation about the 20MPH project.

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

NEWSPAPER ARTICLE: No fines and no cameras in under fire Belfast 20mph zone

“A controversial 20mph speed limit in central Belfast has not resulted in a single fine – two years after it was introduced”. Read more in the Belfast Telegraph here.

VIDEO: An interview with SCPHRPs Professor Jepson about the project.




SURVEY: A four-day survey to capture public perception.

The SCPHRP  and Physical Activity for Health Research Centre (PAHRC) project team embarked on a four-day survey to capture the public perception of the planned implementation of 20mph speed limits in zones 4 and 5 by the City of Edinburgh Council.  The survey questions ranged from general knowledge on the 20mph programme to drivers’ attitudes towards the proposed 20mph speed limit.  As a follow-up, this project seeks to measure public perception after implementation of the speed limit.  The results from the survey will be analysed (together with supplementary data from other sources) to accurately portray the impact of the 20mph speed limits in Edinburgh.


For further information about the 20MPH project, please contact Dr Glenna Nightingale at glenna.nightingale@ed.ac.uk.

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.

Publication Information
Date of Publication 01/01/1970