上海内环线高架道系统经济效益计算模型

1994年通车的上海市内环线高架道路系统有41条上下匝道，其地面道路与72条向地面道路相交。定量计算它的增量经济效益是对项目进行经济效益后评价的关键。内环高架道路系统项目的经济效益计算模型共分四个部分：交通流量模型，高架道路和地面道路车速模型，车辆运行成本模型及各项效益的计算模型。运用上述模型计算出了此项目的运输成本效益、减少车辆拥挤效益、货物和旅客节约时间效益、市中心区和其它各区车公里减少效益及车小时节省效益。

Models Used in Calculating Economic Benefits of Shanghai Inner Ring Elevated Road System Project

Shanghai inner ring road system opened to traffic in 1994.It has 41ramps.The ground roads meet 72 traverse-roads.Calculating the increment economic benefits is the key to the national economic post-appraisal of the project.The models calculating the national economic benefits of the project include 4 parts:models of the vehicles volume;models of vehicles speed on elevated roads and ground roads;models of transport cost;models of calculating benefits.In this paper,the benefits including benefits for reducing transport cost,benefits for reducing vehicle crowding,benefits for saving time of goods and passengers,benefits for reducing vehicle-kilometer in central city and other districts of the city,benefits for reducing vehicle-hour in central city and other districts of the city are calculated by using above models.