from Fark of course...
Road casualties in 20mph zones increased by almost a uarter in 2011, according to official figures.
Meanwhile casualties on 30mph roads were down by 1% from 2010, recorded at 125,494 in 2011, according to data from the Department of Transport.
Councils have been given powers to set 20mph zones in a bid to improve road safety.
more good thinking here:
20MPH zone road crash casualties rise 24% - Home News - UK - The Independent