2024 Volume 80 Issue 20 Article ID: 24-20106
There are many countries in the world where population growth and economic development are expected, and there is a need to plan transportation networks that can meet future domestic intercity passenger transportation demand. It is necessary to appropriately combine multiple transportation modes which have different costs, speeds, compatible distance zones, and environmental impact, while considering economic sustainability, which can be operated without continuous state funding, and environmental sustainability, which reduces energy use and environmental impacts. This research suggests a method to obtain the roles and appropriate share of transportation modes under various carbon dioxide emission constraints by calculating an endogenous demand and fare network optimization model with changing constraints. The calculations were made with a hypothetical network simulating Japan, and it was confirmed that as the emission constraints become more stringent, the mode with the highest carbon dioxide emissions per capita decreases its share in the network in turn.
