关键词: 交通运输系统工程, 区域交通状态分析, 状态分层模型, 路口可达值, 标准路段连通度

Abstract: A quantitative approach for the regional traffic state analysis was developed by identifying the model parameters, the spatiotemporal hierarchical modelling, the quantitative method, and the case validation. The link traffic state coefficient was taken as the road network traffic state model parameter. The spatial information of road netwrok, the temporal traffic state information, and the traffic state judgement information were contained in the traffic state connection matrix, from which the reachable traffic state matrix can be calculated. Based on this a hierarchical model was deduced using the hierarchical algorithm. Giving the evaluated numerical values to the intersections and links in the hierarchical model, the quantitative results such as the intersection reachable value and the standard link connectable degree were calculated. The data in the real road network in Beijing were used to test the approach and the results show that the developed hierarchical model can be used to analyze quantitatively the traffic state of the intersection and its evolution, demonstrating the developed regional traffic state quantitative approach is feasible, which can be spreaded to perform the analysis of real traffic state, the control of regional traffic, the traffic induction, the research of traffic congestion and its evolution.

Key words: engineering of communications and transportation system, areawide traffic state analysis, state hierarchical model, intersection reachable value, standard link connectable degree