Abstract
It is our great challenge to establish Low-carbon transport system in Asian region because the emission of carbon dioxide from transport sector in Asia is substantial and expected to grow over the future. In this study, interregional freight modal split in GMS was formulated as a goal programming problem which aimed to achieve the targets of transport cost, transport time and CO2 emission in order to calculate ecoefficient modal split. Two case study routes, Bangkok – Hanoi and Bangkok – Yangon, were examined by development scenarios and targets. As a result, the optimal modal splits for respective scenarios, targets and routes were calculated and the trends and differences between them were also revealed. The results also implied the efficiency of the railway introduction on the case study routes.