For a long time now, adaptations of North American manuals, which reflect different road conditions, have been used to calculate highway capacity in developing countries. For example, "road capacity with regulated pavement and signalling conditions" in some cases, does not correspond to reality because in developing countries, some two-lane highways do not have pavements and/or signalling so assignment factors are needed to determine the real capacity of such roads. Road marks in irregular conditions and an absence of signs change driver behaviour, which in turn affects operational conditions of traffic. In a bid to assess functional highway capacity, this study focuses on the operational characteristics and the impact of road markings and signalling on two-lane highway capacity. This paper, part of the research the Manual Audino de Capacidad (Andean capacity manual) is presently conducting on two-lane highways, explains analytical methodology, factors that impact on the capacity of this type of road with proper or deteriorated markings and signalling. (A)
Abstract