关键词: 无信号交叉口, 可接受间隙理论, 车道功能划分, 通行能力

Abstract: The minor approach at unsignalized intersection usually has different lane use allocations,however,the maximum capacity of mixed traffic flow on which can't be effectively calculated out by any other current method.Based on gap acceptance theory and probability theory,the capacity of different lane uses such as through-left,through-right etc are discussed. After analyzing the probable queue type consisting of different turning movements and different vehicle types,the capacity model of different lane use group in minor approach is set up,and the main traffic headway must be in accordance with the negative exponent distribution.Therefore,the capacity theory of unsignalized intersection with mixed traffic stream is improved,and theoretical base of the traffic management in urban city is provided.

Key words: unsignalized intersection, gap acceptance theory, lane use allocation, capacity