2019 Volume 5 Issue 2 Pages A_293-A_302
This research estimated the passengers’ benefit accrued by expressway expansion. An integrated travel demand model which is composed of mode choice, destination choice and trip generation model was developed in order to comprehensively assess the behavioral changes brought by expressway expansion. In addition, “travel time delay”was explicitly considered in the mode choice model as an indicator of travel time reliability. The result showed that the value of travel time reliability was around 40 times larger than that of travel time savings, and the amount of travel demands such as induced, transferred and shifted traffics would be too large to ignore even if the length of expressway expansion were relatively short distance. Also shown was that the passengers’ benefit attributed to those demand accounts for approximately half of overall benefit. These results indicate that the current evaluation method based on the road network assignment model with fixed demand might seriously underestimate the passengers’benefit accrued by expressway expansions and mislead the policy decision to postpone them.