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根据系统分析的方法,建立了交通状态与拥挤程度评价指标体系。根据路网交通拥挤率和路网交通拥挤促成度2个指标,评价了交通拥挤的影响程度,确定了交通合理性的判断标准,建立了城市用地再开发下交通拥挤预检方法,以马里兰州部分地区的无再开发、住宅再开发、住宅与就业再开发3种方案为例进行实例验证。分析结果表明:在第1种方案下,小汽车分担比、平均出行距离、总行驶里程、总行驶时间、总车辆延误、拥挤车道里程、车辆延误指数和拥挤车道里程比分别为93.70%、24.98km、225 817 698km、5 369 291h、2 038 880h、4 686km、0.380、0.180;在第2种方案下,上述指标分别为92.48%、24.78km、219 992 101veh、5 227 303h、1 831 190h、4 320km、0.350、0.166;在第3种方案下,上述指标分别为92.22%、24.82km、219 023 166km、5 342 457h、2 062 041h、4 422km、0.386、0.169;3种方案的路网交通拥挤度分别为0.280、0.258、0.278,但第3种方案下的车辆延误和车辆延误指数增加,第2种方案对交通拥挤具有轻微缓解作用,优于其他2种方案。
According to the method of system analysis, the index system of traffic status and congestion degree is set up. According to the traffic congestion rate of road network and the degree of traffic congestion in road network, the paper evaluates the impact of traffic congestion, determines the criteria for traffic rationality, and establishes the traffic congestion pre-inspection method for urban land redevelopment. No redevelopment in some areas, residential redevelopment, residential and employment redevelopment three programs as an example to verify. The results show that car sharing ratio, average travel distance, total driving distance, total driving time, total vehicle delay, congestion lane mileage, vehicle delay index and congestion lane mileage ratio are 93.70% and 24.98 respectively under the first scenario km 2, 225 817 698km, 5 369 291h, 2 038 880h, 4 686km, 0.380 and 0. 180; under the second scenario, the above indexes are respectively 92.48%, 24.78km, 219992101veh, 5 227 303h, 1831 190h, 4 320km, 0.350 and 0.166 respectively; under the third scheme, the above indexes are respectively 92.22%, 24.82km, 219 023 166km, 5 342 457h, 2062 041h, 4 422km, 0.386 and 0.169; The congestion levels were 0.280,0.258 and 0.278 respectively. However, the vehicle delay and vehicle delay index under the third scenario increased. The second scenario showed slight relief to traffic congestion, which was better than the other two schemes.