HL Deb 03 February 1993 vol 542 c15WA
Lord Marlesford

asked Her Majesty's Government:

What was the average speed of traffic in central London in 1970, 1980 and the latest convenient year between 8 am and 6 pm on weekdays.

The Earl of Caithness

London speed surveys are carried out every three or four years. For central London, data for the nearest years to those requested are as follows:

m.p.h.
1971 12.7
1980 11.9
1990 10.4