This article presents a simulation model that depicts
transport user choice in urban areas among different
types of private cars and public transport. The model is
used to examine the effects of different policies to aid
reduction of greenhouse gas emissions. Simulation results
reveal that policies directed towards the adoption of new
private car technologies and towards public transport
cannot be analysed separately. Policies must be designed
in unison in a way that they work well together and do
not undermine each other's effects. For example, policies
targeting electric car adoption may reduce public
transport ridership and not advance the overall vision of
emission free transport.