Speed limits of 20mph are only effective in areas with speed humps, new research suggests.
Queen’s University Belfast reviewed DfT studies from last year. It found roads which enforce ‘speed zones’ using humps or chicanes as well as signs reduce collisions by 41% and serious and fatal injuries by up to 46%.
Previous Department for Transport (DfT) data, has suggested that road signs alone are not a sufficient deterrent.
Dr Ruth Hunter, of the Centre for Public Health at QUB, said: “Our findings show a growing body of evidence to support the use of 20mph zones, showing them to be effective in reducing the number and severity of collisions and casualties.
“Our research also found an increase in participants walking and children cycling spontaneously in 20mph zones, indicating the potential indirect positive impact on physical activity.”
The Department for Transport’s end of year report in 2018, however, found that 20mph zones in England failed to reduce air pollution or increase the uptake of walking or cycling over a four year-period.
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