An example of transport policy assessment in TRESIS 1.4 to reduce greenhouse gas emission in Sydney, Australia

The system wide impacts principle is crucial in public policy formulation. Problems often emerged when decision makers had to decide the optimum policy. This paper discusses the need of an integrated point of view in designing a transport policy. TRESIS 1.4 is an example of a transport policy tool with an integrated assessment between transport, land use, and the environment. The exercised policy applied for Sydney, Australia was based on testing the combined policy (1). Increasing the fuel excise by fuel type (petrol and diesel class 1-10 per L petrol and diesel) by 5% annually in five consecutive years; (2). Increasing the fuel efficiency of current vehicles by 5% annually. The priority of objectives of the policy was related to the environment measurements, i.e. to reduce the greenhouse gas emissions. Findings reported that the combined policy had positive impacts to reduce greenhouse gas emissions (GGE) and energy consumption significantly, but not the ozone (photochemical smog). In addition, the trade-off from the combined policy had cancelled out the losses and benefits for government (revenues neutral) if otherwise the separate policies applied. This exercised policy demonstrated the capability of TRESIS 1.4 in determining the optimal solution based on the assigned priority measurements.