Research on Impact of Short Lane on Signalized Intersection Capacity

Since the limited length of short lane,there occurs the potential effect of queue blockage for the road widening intersections.Based on the related results of traffic flow theory and probability theory,the impact of the short lane on the capacity of the signalized intersections was worked out with the qualitative and quantitative analysis.For the three different signal-phase programs,the calculation model of lane group's capacity was established with the consideration of potential blockage and tested with simulation method.Then,the study on the related factors and the sensitivity analysis about the impact on the capacity due to the short lane were conducted.According to the study,the length of short lane and the signal phase effect the signalized intersection capacity greatly,and there exists an optimum signal cycle to the capacity.