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To ask the Secretary of State for Transport if he will estimate the total reduction in vehicle kilometres that would result from a (a) 10 per cent. (b) 20 per cent. and (c) 50 per cent. increase in average vehicle occupancy.
It is estimated that the decrease in vehicle kilometres for cars, taxis and vans as a result of an increase in vehicle occupancy would be as follows:
|Vehicle kilometres by cars, taxis and vans (billion)|
|Increase in vehicle occupancy||Resultant percentage change in vehicle kilometres||Current (2003)||Following decrease in occupancy||Change|
|10 per cent.||-9||451||410||41|
|20 per cent.||-17||451||376||75|
|50 per cent.||-33||451||301||150|
This assumes that the occupancy increase is a result of increased trip sharing and therefore fewer trips, and not, for example, from a shift of passengers from other modes of transport. It is also assumed that an increase in occupancy does not result in an increase in trip length (i.e. passenger kilometre figures stay fixed).