The report is a review and discussion of research regarding effects of the road environment on driver behaviour. The discussion relates to theories and facts regarding driver information needs, limitations of the human visual system, information processing, driver expectations, mental load, and risk compensation. Measures to influence driver behaviour are discussed under the following headings: 1) road geometry and intersection design, 2) road markings and traffic signs, 3) driver behaviour at signalised intersections, and 4) measures to influence driving under reduced visibility (darkness, precipitation, fog, tunnels). It is concluded that there is a scarcity of behavioural data for several measures, and that there is a need for better understanding of behavioural adaptation to the road environment, and of the implications for safety. (A)
Abstract