§ Mr. LazarowiczTo ask the Secretary of State for Transport, Local Government and the Regions what assessment he has made of the effect on the level of road accidents, broken down by type of(a) accident, (b) injury and (c) victim, of the operation of (i) mandatory and (ii) advisory 20 mph limits. [30326]
§ Mr. JamiesonTRL research on urban speed management methods published in 1998 (TRL Report 363) found only an average 1 mph drop in speeds and no discernible accident reduction in accidents in 20 mph limits using only signs. Advisory speed limits are not normally approved in England and Wales. However, the more successful 20 mph zones that use self enforcing traffic calming features achieved average speed reductions of around 10 mph which produced a 70 per cent. reduction in child pedestrian accidents and a 48 per cent. reduction in child cyclist accidents.