Abstract
In Southeast Asian countries (SEA), road transport accounts for the main energy consumption
and CO2 emission. Air pollution is a major concern in densely populated cities such as Bangkok,
Manila, and Kuala Lumpur. The main objective of this paper is to give insights on trends of transport
development, car ownership, and CO2 emissions in Southeast Asia. This study also attempts to review
the successful transportation policies around the globe and to introduce the possible instruments
that can help reduce air pollution in Southeast Asian countries. Economic instruments to estimate
the benefits of a cleaner environment due to new policies are introduced as well. The results of this
research could help policy makers consider approaches that could internalize external costs of
transportation and maximize the societal welfare.