TRAVEL TIME VARIABILITY ON COMMUTER JOURNEYS

This paper presents some results from a study of travel time reliability for private car commuter journeys conducted in Melbourne, Australia. Statistical analyses of the data were used to investigate the distribution of travel times, the independence of travel times on adjacent sections of a route and the relationship between congestion and the variability of travel times. Some new and some confirmatory results were obtained. The use of the results in a traffic assignment context is discussed and areas of future research outlined.