This paper has focused on the highway infrastructure development in a port city. It found that the impacts of the road network system in Port Klang towards human travel patterns affect the road network system itself. In order to achieve sustainable development, we need to know how people behave in travel before implementing and enforcing something new which may impact the people’s lives.
The toll collection on a new highway has served to encourage road users, especially heavy vehicles drivers, to find alternative routes in order to avoid paying the toll. This has led to congestions in certain parts of the roads and highways in Port Klang area, especially those that are not tolled or charge lesser tolls. This has defeated the main objective of providing more efficient transportation network by building newer tolled roads. Thus, it is imperative that transportation planners recognize the travel patterns and behaviours of motorists, especially truck drivers, in dealing with supposedly efficient highways that charge high user fees. Otherwise, the benefits of providing them may not be as great as expected.