关键词: 城市交通, 通行能力, 排队论, 定点停靠公交站, 溢出概率

Abstract:

There is no doubt that the road link capacity is affected by the layout of bus-stop. Meanwhile, the impact of dwelling way on road link capacity cannot be ignored to some extent. In this paper, a typical c_M/ M/1 queueing model is proposed to analyze the waiting time for entering the fixed-dwelling bus stop. Based on this, road link capacity is estimated from the view of time occupation. Results show that compared with free-dwelling bus stop, the effective berth number of fixed-dwelling bus stop has a more distinct marginal decreasing law of value. On the one hand the increasing failure rate at fixed-dwelling bus stop reduces link capacity, on the other hand the less service time caused by fixed-dwelling compensates link capacity. When the bus arrival rate is getting close to saturation, the adjustment factor of road link capacity with fixeddwelling bus stop is about 0.96 and this factor is one percent increase over the factor of free-dwelling bus stop.

Key words: urban traffic, capacity, queueing theory, fixed-dwelling bus stop, failure rate