HC Deb 01 March 1999 vol 326 c524W
Mr. Corbyn

To ask the Secretary of State for the Environment, Transport and the Regions what estimates his Department has made of average traffic speed in central London(a) in each of the last 15 years and (b) at the latest available date. [73157]

Ms Glenda Jackson

Speed surveys covering central, rest of inner, and outer London are conducted on a rotating basis, with each of these three areas surveyed every three to four years. The latest survey in central London was carried out in 1997. The estimates of average traffic speeds (mph) in central London over the last 15 years are as follows:

Morning peak Daytime off-peak Evening peak
1983 11.8 11.9 11.5
1986 11.5 11.0 11.0
1990 10.3 10.6 10.3
1994 10.9 10.9 10.8
1997 10.0 10.0 10.2
Peak times 7.45am-9.15am 10.00am-4.00pm 4.45pm-6.15pm