Abstract
This paper provides an overview of motorization trends of the highway system in Taiwan in the past 15 years. The high growth of motor vehicles and road length had caused traffic congestion, environmental pollution, and energy consumption. To meet the needs of sustainable transport, the development policies of highways should shift towards the enhancement of transportation management and maintenance, the concern of disadvantaged people and areas, the introduction of advanced technology, and the application of eco-technology in infrastructures. (Author/publisher).