城市交通网络连通可靠度计算研究

考虑路段、交叉口运营状态的随机变化,以饱和度作为交通网络连通可靠度的主要影响因素,完善路段连通可靠度的计算式,给出了交叉口可靠度的衡量指标;结合路段、交叉口可靠度特别是交叉口不同转向的可靠度,设计了一种生成树算法寻找交通网络的不交型通路,进而快速计算交通网络中任一OD对间的连通可靠度。算例表明,交叉口的可靠度对城市连通可靠度有重要影响,提出的算法具有一定的应用价值和借鉴意义。

Study on computation of urban traffic network connectivity reliability

This paper considersed the random variation of the operational state at the roads' section and intersection, taking the road saturation as the main factor. It improved the formula of road section connectivity reliability, and provided the measurement of the intersection reliability, combining sections, intersections reliability especially the reliability of the intersection of different steering, it designed a spanning tree algorithm to find a disjoint path of the transport network, and then quickly calculated any OD connectivity reliability of transportation network. The example shows that the intersections' reliability impacts the urban transportation network connectivity reliability. The proposed algorithm has a certain value and referenced significance.