The national income accounts show that in 1969 the transport sector, excluding communications, contributed 6.2 per cent of the Gross Domestic Product of the United Kingdom. Back in 1956, the figure was 6.9 per cent and in the intervening years the proportion, though declining slowly, has been very stable. Edwards (1970 a), using census data for the production and distribution industries, concluded that ‘it is probable that transport accounts for at least 9 per cent of the total cost of producing and distributing [goods]’. On the face of it, spatial variations in the incidence of transport costs ought to be a highly significant factor for industrial location and for regional development generally.

Yet, in his review of the available post-war literature on industrial location in this country, Brown (1969, 778) came to the following conclusion:

Brown could have added that it is widely accepted that though transport costs may be a negligible factor in industrial location, other attributes of the transport sector are important; speed, reliability, convenience, packaging problems and the feasibility of integrating transport services into the production process are all given serious consideration by industrialists.