TRAFFIC sign regulations dating back more than 30 years could cost lives, says the AA.

The rules, introduced in 1969, prevent local councils putting up additional 30mph signs to warn motorists of the speed limit once they enter urban areas. This could lead to drivers forgetting the limit.

The AA says the rules should be changed as they do not take into account the growth of towns and cities. Nor do they account for the growth of the number of 30mph zones.

The AA’s call follows the recent introduction of a Private Members Bill in the House of Commons for 30mph repeater signs to be put on all roads. The Bill, from Chris Grayling, MP for Epsom and Ewell, is unlikely to be passed because of insufficient Parliamentary time.

The 30mph repeater signs are forbidden on urban roads as drivers are supposed to be know that they are in a 30mph area - because the area is built up, and because street lamps are 200 yards apart.

Paul Watters, AA Head of Roads and Transport, says: “These rules were introduced when built-up areas were easier to define. But they have not kept pace with the huge growth in semi-urban and non-urban 30mph zones.”

Some local authorities put up unofficial 30mph reminder signs to try to help drivers comply.