We love our safer 20mph limits

We’re celebrating 20mph. People love 20mph limits as they are proven safer and healthier. 20mph is nearly fatality-free (3% vs 20% fatalities at 30mph). Both UK results and published literature says we are better protected on 20mph streets. Those who care want 20mph limits.

When traffic speeds reduce across a community there are fewer crashes, deaths or injuries plus its quieter, there are energy savings and air quality improves. The long list of benefits goes on.  A Journal of Public Health paper recently evidenced 20mph as effective at improving public health via reduced collisions and injuries[1]  The World Health Organisation say 20mph is safer for pedestrians[2].  UK places at 20mph and reporting fewer casualties include:


Location / Study

% Fewer Casualties

Newcastle - 2007 – 8 x 20 mph limit areas in residential areas


Lancashire County Council - 2012 results of 3 pilot 20mph limited areas

2014 results - http://www.blackpoolgazette.co.uk/news/community/community-news/next-phase-of-20mph-limits-is-rolled-out-1-6950104


nearly 30%

Warrington – Aug 2010 – 3 pilot 20mph limit areas of 140 roads 18 month trial 20mph Speed Limit Pilots Evaluation Report 6.10.10

27% fewer collisions on residential roads

Portsmouth - 20mph limits (implemented 2007/08) 3 year before and after results


Nottingham http://www.chad.co.uk/news/local/20mph-speed-limit-slows-down-accident-rate-1-6945529  Sherwood previously 9.4 casualties down to 8 casualties pa

Cycling and walking up as preferred mode of transport up 17.5%


Brighton phase 1 April 2013-14 (compared to previous 3 yr avg)  http://www.brighton-hove.gov.uk/content/parking-and-travel/travel-transport-and-road-safety/safer-streets-better-places



Edinburgh’s 1000 person survey[3] found support for 20mph rose from 68% before to 79% after implementation. Walking trips rose 7%, cycling trips rose 5% and car trips fell 3%.  Casualty prevention, child protection plus better health from more exercise and health equality are the major reasons why Public Health Funds are contributing to 20mph limit setting. Examples include Lancashire £1m, Calderdale £500k, Liverpool £400k and Manchester £350k.

20’s Plenty for Us helps people to get 20mph limits set on their streets.  If you love 20mph too please support us!  We’re free to join and have a network of nearly 250 campaign groups nationwide.

[1] Jo Cairns et al Go slow: an umbrella review of the effects of 20mph zones and limits on health and health inequalities. J of Public Health Advance Access 28 Sept 2014 pp1-6 http://m.jpubhealth.oxfordjournals.org/content/early/2014/09/28/pubmed.fdu067.full

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