§ Mr. Spearing
To ask the Secretary of State for Transport if he will take steps to investigate the proportion of traffic congestion in London which could be reduced by(a) improved co-ordination of road works, and (b) better supervision of construction sites, (c) more effective traffic signal operation and maintenance, (d) faster reaction to breakdowns and (e) other measures.
§ Mr. Norris
In 1993, the Transport Research Laboratory investigated the causes of traffic hold-ups in London using the "congestion file" maintained by the Metropolitan police. I am sending the hon. Member a copy of its report, "The frequency and importance of incidents which cause congestion in urban areas", TRL contractor report 342.