Research On Regional Traffic Coordination Strategy Under Traffic Congestion Condition

This dissertation is depends on the country"863"the project"the new generation intellectualization traffic control system key technologies research and development"(Project number:2006AA11Z228)The municipal transportation control and hands over the throughflow induction is in the municipal transportation management two big principal means and the management way, the two's coordination is the modern traffic control development direction. But used at present the traffic signal control system is divides the region to carry on the control, between the region and the region is independent does not carry on the regional control policy mutually coordinated. The independent operation's zone control center formulates the home court territory control policy. Along with the traffic signal control technology's unceasing progress, boundary traffic flow's unceasing increase, this urgent needs raises between the region and the region transportation coordinated question the program.This article first reviewed the traffic control and the transportation induction coordination in the domestic and foreign historical development and the research present situation. With handed over the throughflow inducible system's action mechanism from the region traffic control to obtain, to analyze the region traffic control system with to hand over the throughflow inducible system's relatedness, has been clear about the region coordination necessity and the characteristic. In already obtained the experience, in the achievement foundation studies under the crowded condition the region coordination question The concrete research content is as follows:( 1 ) Analyzed area coordination object. In the urban wide range's transportation induction and the traffic control coordination, its coordination's object is the transportation region. Introduced with emphasis the region traffic control system's characteristic, then has constructed the wide range traffic control system frame, was clear about the wide range traffic control center to be in the strategic location to provide the control policy for each region. The region in should first carry out the wide range control policy and the induction strategy to the subsegment. Then summarized the domestic and foreign related coordination research results in detail, introduced with emphasis the coordination the model algorithm and the coordination pattern, the region coordination strategy's formulation provide the basis for the wide range traffic control system in.(2)Forecast Region traffic congestion condition. First divides into unimpeded the region transportation condition, slight crowded, crowded, blocks four kinds. Region traffic congestion including in region boundary traffic congestion and region traffic congestion. Good management games should be able along with the concrete transportation condition change, but real-time change. When the forecast crowds its possible trend of development is influential to the neighboring region, only then needs in the wide range to the region to carry on coordinated. Therefore crowded and the crowded area of influence carries on the estimate to the region coordination's prerequisite region, carries on the analysis to the region traffic congestion trend of development. Then conducts the region coordination strategy research in view of the traffic congestion region(3)Analyzed area coordination strategy. Pointed out that the region crowded attribute difference, the coordination should use the different pattern, and according to concrete coordination pattern creation coordination model. Regarding the traffic congestion regional coordination strategy, the wide range traffic control center is in the strategic location overall plan arrangement. Regards as a controlled member the entire road network, after-crops the control policy for each region, and is coordinated the crowded region as well as the region boundary strategy, achieves the wide range the traffic control benefit whole to be most superior. Region coordination strategy respectively be region boundary coordination and regional coordination strategy.(4)Studies under the crowded condition the region boundary coordination strategy. The region boundary is between the region road section or several road intersection composition subsegment. The region boundary has connected two region important land sectors, the region boundary coordinated quality immediate influence to the region import's and export's control state. The crowded region boundary coordination model is mainly is through realizes to the region boundary coordination control and the induction as the cooperative system merit energy level distinction modelling. The urban main yang or male principle is the quite common region boundary, this article establishes the double-decked coordination optimization to complete between the subsegment to be coordinated the variable to raise path's use efficiency, can cause the vehicles to assign balanced in the path network, the traffic congestion phenomenon is improved. The region boundary coordinates when considers the boundary the special details formulation corresponding coordination strategy, when region boundary for urban main yang or male principle, must carry on the skeleton line coordination in the wide range.(5)Studies under the crowded condition the regional coordination strategy. The article mainly conducts the research to a region traffic loading oversized situation. If some region occurs crowded, regards as a controlled member this region and the related region, take as soon as possible eliminates crowded as a goal, coordinated region traffic control strategy. The wide range uses the imbalance induction suitably in the crowded region the way, will use the wide range the inducible system prompt relief of traffic the surplus volume of traffic to induce this region, guaranteed that the region internal transportation will be unimpeded, achieves the wide range the traffic control benefit whole to be most superior. Finally, selects the VISSIM simulation software to carry on the confirmation to the regional coordination question. Coordinates the region take Changchun's road network as the background establishment, the analysis analogue result may see, under the region coordination plan the crowded region crowded dissipation is quite quick, region each target improves compared to the non-coordination situation, carries on the control and the induction coordination can make the remarkable progress.Finally, the paper to the work which did has carried on the summary, has analyzed the progress which and the achievement the research institute obtained, and question which discovered according to the research, had pointed out waits for direction which further studied.