THE EFFECTS OF NETWORK STRUCTURE ON RELIABILITY OF TRANSIT SERVICE

A set of simulation experiments are described which have been constructed to investigate the effects on service reliability of several characteristics of network structure in urban bus systems. Principal focus is on the factors which lead to vehicle bunching, and on the effects of network form and route density on transfers. The results of these experiments highlight the importance of controlling link travel time variability, and of scheduling to ensure expeditious transferring, especially in radial networks.