This national report deals with the following items: (1) justification of road investment - social and economic impacts of road construction. Harmonization of traffic and transport matters to facilitate road transport between countries, (2) management of road investments, (3) operation of road network- accidents, users safety and behavior, vehicle condition, legislation. A method examined in Thailand is introduced for collection of the relevant data, identification of the hazardous road sections and preparation of a simple master plan for traffic safety.
Abstract