Evaluation of the interregional transportation network is necessary to examine the efficient utilization and service supply planning of public transportation, with the consideration of multiple contradictory societal demands, including the improvement of transportation convenience and reduction of environmental load. Whenever one societal demand on a network is satisfied, another should not be forgotten. This study develops a method for evaluating interregional transportation networks, which considers multimode route alternatives by setting two evaluation criteria: consumer surplus and CO2 emissions. The proposed method can provide the tendency of one criterion when the other is optimized. For example, when maximizing consumer surplus, the optimized network was found to have many links with increased frequency of service. Moreover, the increase in CO2 emissions can be obtained quantitatively in connection with the maximization of consumer surplus.
2016 Eastern Asia Society for Transportation Studies