There is compelling evidence that 20mph zones are effective at reducing the number and severity of road accidents and collisions, according to a collaborative study led by Queen's University Belfast. However, it is less clear if 20mph zones result in improved air quality, liveability or public health, says the report.
The team of academics assessed 11 studies that focused on 20mph zones on two studies on 20mph limits. All the studies pointed to a drop in casualties and collisions involving...
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