20mph improves public health: Durham University
20mph zones and limits are “effective means of improving public health via reduced accidents and injuries”, according to a new study by researchers from Durham University.
The findings are contained in a research review, ‘Go slow: an umbrella review of the effects of 20 mph zones and limits on health and health inequalities’, authored by five academics from the department of geography and public health team at Durham University. A summary of the findings has been published in the Journal of Public Health.
The report says that transport is an important determinant of health, and that there is a “well-established association between socio-economic status (SES) and risk of road accidents”.
The team used systematic review methodology to identify the effects of 20 mph zones (including speed limits and road humps) and 20 mph limits on health and SES inequalities in health among adults and children. They identified evidence from five international systematic reviews on 20mph zones and limits.
They concluded that overall, the results provide “convincing evidence that these measures are effective in reducing accidents and injuries, traffic speed and volume”, and “evidence that such interventions are potentially cost-effective”. The report also says that in two of the studies there were improved “perceptions of safety”.
It suggests that “whilst there was no direct evidence on the effects of (20mph) interventions on health inequalities, targeting such interventions in deprived areas may be beneficial”. The researchers recommend “further controlled evaluations that specifically examine SES effects”.
Commenting on the report, Rod King MBE, founder of 20’s Plenty for Us, said: “The evidence in road safety, public health, active travel, noise reduction, emissions and simple livability all point towards default 20mph limits becoming the norm for UK communities.
“This research adds even more weight to the view that current blanket 30mph limits compromise public health in our urban realm.”
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