The department of transport produces figures projecting the number of vehicles
and also the use they make of the roads in britain.
Clearly the use of vehicles is of more importance to road traffic planners than the number of registered vehicles,
some of which may be driven very little.
The data values are scaled to a base of 100 for 1992
Car density . Lower estimate
Car number.
Examine the data and consider the implications for road planning in the next century