forecasts of numbers of vehicles and volumes of traffic are revised in the light of 1971 data on vehicle licences and traffic flows and of the latest population forecasts. it is estimated that the number of vehicles in great britain is likely to rise from 15 millions in 1971 to 22 millions in 1980, 27 millions in 1990 and 33 millions in the year 2010. the forecast for the year 2010 is 3 million lower than the previous estimate. most of this difference is due to the downward revision of the population forecasts. the forecast of volume of traffic in the year 2010 is 478 thousand million vehicle kilometers, slightly lower than the previous figure, and just over double the figure for 1971. (a).

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