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Secondary stories: Issue 486 24 Jan 2008

20mph speed limits could be bad for the environment warns AA

Local authorities intent on introducing 20mph speed limits on road safety grounds could be unwittingly helping to increase the volume of carbon dioxide emitted into the atmosphere, the AA warned this week.

The motoring organisation said that petrol car fuel consumption on longer and relatively free flowing 20mph urban streets could decline by 1.3 miles/litre compared with a 30mph street. Some councils could be "guilty of hypocrisy" if they implemented blanket 20mph limits and at the...

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