§ Mr. CorbynTo ask the Secretary of State for the Environment, Transport and the Regions if he will publish his Department's estimates of traffic speed in central London for each of the past 10 years; and if he will give the estimate for the current year so far. [13989]
§ Ms Glenda JacksonPublished estimates of average traffic speeds (mph) in central London since 1968 are as follows:
Morning peak Daytime off-peak Evening peak 1968 12.7 12.1 11.8 1971 12.9 12.6 12.7 1974 14.2 12.9 13.2 1977 12.3 12.6 11.9 1980 12.1 11.6 12.2 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 Morning peak: 7.45 am-9.15 am
Daytime off-peak: 10.00 am-4.00 pm
Evening peak: 4.45 pm-6.15 pm
Speed surveys in central, inner and outer London are conducted on a rotating basis, with each of these areas surveyed every three to four years. Data from the recently completed 1997 central survey are currently being validated and the survey results will be available later this year.