The demand for road transport is a derived demand, derived from the demand to transfer both the population and goods between different locations (Griffiths and Wall. et al 1999) and is heavily influenced by both time and space, subjected to regular fluctuation creating the characteristic peak and off peak situation upon urban roads. This results from the immediate consumption of a road, if it is to be considered as a good, preventing the possibility of storing the good for periods of greater demand. The demand placed upon road transport is therefore affected by three main factors.…
