关键词: 交通运输工程, 提前右转, 机动车, 交织区, 通行能力

Abstract: On the basis of the theories of gap acceptance and probability, the theoretical passing capacity of the advance rightturn vehicles under two planning approaches was investigated. A mathematic model for using interweaving area to enhance the passing capacity of the advance rightturn vehicles was proposed. By this model, the running efficiency of the two planning approaches was compared where the average delays were taken as the assessment index. In a junction where motor vehicles were allowed rightturn in advance, the first approach was applied if it meets the demand of rightturn motor vehicle capacity; otherwise prolonging the interweaving area to increase the passing capacity was adopted to reduce the average delay of the rightturn vehicles. Prolonging the interweaving area is an applicable approach to solve practical problem although it enlarges the conflict zone.

Key words: transportation engineering, advance rightturn, motor vehicle, interweaving area, passing capacity