from the telegraph
which leads with the headline:
20mph limit has not made roads safer
In Portsmouth, the new, lower speed limit applies to all vehicles, at all times, on 94 per cent of the city’s streets. It is not enforced by speed cameras or road humps, but relies on drivers to obey limit signs.
The analysis, carried out by the consultants Atkins on behalf of the DfT, found that prior to the reduction in the limit, an average of 18.7 people per year were killed or seriously injured on the streets covered.
After the reduction this rose to 19.9 per year.
Taking into account people with less serious injuries, overall road casualties fell by 22 per cent after the scheme was introduced.
so, not really.
2010 – 92 KSI
2011 – 143 KSI
Care to dispute that?