Research On The Key Theory And Method Of Bus Rapid Transit Operation Control System

With the acceleration of urbanization in China, the scale of city expanding and thenumber of city increasing, the population of urban rapidly growing, traffic congestiongradually drew people’s attention. Also contributed to the economic development ofprivate car ownership in recent years has brought great pressure on urban transport, avariety of transportation problems have become a restricted urban development"bottleneck." Although many cities have taken a variety of measures to deal with thissituation, such as the upgrading of urban roads, increase overpasses and pedestrianbridges to ease urban traffic congestion problems, but this balance between supply anddemand is short-term. Along with the improvement of the pillar industries to support theautomotive industry and urban transport facilities, the number of people buying carsinevitably increasing. Clearly, the growth rate is far from the road and the vehicle growthsynchronized so that the traffic demand and supply will be a long conflict, and evenintensified.Numerous domestic and foreign research results suggest that to develop publictransport is an effective measure to ease urban traffic congestion and to improve theenvironment. Because regular bus rapid transit system has the characteristics ofeconomic, convenient, and flexible features, but also has a large rail transportationcapacity, high speed, it is becoming the best choice to improve urban public transportservice levels and operational efficiency. Therefore, the study of critical theory andmethod of urban BRT system operation, for ease urban traffic congestion, improve travelefficiency residents, improve the traffic environment has important significance.Relies on the construction of the Ministry of Transport in Western science andtechnology projects "urban rapid transit (BRT) planning, control and operation of keytechnologies", the paper break conventional BRT operation control system theory and methods, proposed BRT operation control system, and related and methods have beenstudied, the specific contents are as follows:(1) Full analysis of the functional requirements of BRT operation control system,give the composition of BRT operation control system, including its logical frameworkdesign, physical design framework, system, function, and so on. Study the keytheoretical study BRT operation control system, in order to build BRT operation controlsystem has laid a theoretical foundation Research(2) Analysis of running state of the control system of bus rapid transit perceptiontechnology, access real-time running state of system from two aspects of informationcollection and running status discrimination, provide data support for the followingcontrol strategy implementation.(3) Fully study the BRT signal priority control strategies and methods, analyze theimpact by the emergency to the BRT system, proposed the control method BRT runningunder emergencies. In emergencies, we must meet the needs of emergency vehicles andEBRT and the transport needs of all traffic participants in the intersection. In the controlmodel, the system determines the type of vehicle according to the detection object to thepriority control using different control strategies. The emergency vehicles and EBRT arebased on the principle of the absolute release. The BRT is determined the type of controlstrategy according to the current operating status of each vehicle. Take Beijing BRT1lineas the simulation object, the paper demonstrates the effectiveness of the proposedmethod.(4) Propose BRT grid frequency control method based on passenger change. BRTon the line has imbalance in time and space, because traffic is constantly changing, at thepeak of traffic is relatively large, but in peak time traffic is relatively small, however, thesame site each day, the same time the passenger amount of similarities characteristics,therefore, the current through the history of traffic and traffic, based on RBF neuralnetwork model short-term traffic forecasting future periods to forecast traffic based ongrid frequency model to build and use self-adapt genetic algorithm to solve the model. Beijing BRT1line real-time data to verify the effectiveness and feasibility of theproposed method.(5) Propose the evaluation method of BRT operation control system. Establisheevaluation index system of BRT operation control systems at first time. Then, the paperanalyzes the advantages and disadvantages of the various evaluation methods in the past.Uses the evaluation method of the secondary fuzzy comprehensive for pre-built, after thecompletion, the paper takes the evaluation method based on gray entropy weightclustering. The proposed method was verified based on Jinan BRT No.1and2lines.