| 考虑拥堵成本的机场路网可靠性测算方法 |
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| 引用本文： | 贾俊华,包丹文,顾佳羽.考虑拥堵成本的机场路网可靠性测算方法[J].交通信息与安全,2017,35(2):16. |
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| 作者姓名： | 贾俊华 包丹文 顾佳羽 |
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| 作者单位： | 南京航空航天大学民航学院 南京 210016 |
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| 基金项目： | 国家自然科学基金项目江苏省自然科学基金项目 |
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| 摘 要： | 为解决传统行程时间可靠性测算算法应用于机场路网的不足,即未考虑实际路网运行情况以及机场旅客出行成本问题,分别引入路段拥堵修正因子以及成本因子,构建机场路网行程时间可靠性测算模型,并且引入路网标准速度,用最小误差平方和的方法对改进后的测算方法进行验证.以南京禄口国际机场集疏运路网为例,改进后的路网行程时间可靠性测算结果与实际路网标准速度的最小误差平方和,即LSE的值为0.57,比传统的测算结果小0.03,说明改进后的测算结果更接近实际路网行程时间可靠性.测算出南京禄口机场集疏运公路路段行程时间可靠性在0.69~0.89内,路网行程时间可靠性测算结果在0.65~0.78内,机场集疏运路网行程时间可靠性存在分布不均,核心路段行程时间可靠性低等现象.改进的测算方法,在一定程度上解决传统路网行程时间可靠性测算算法与实际路况脱节的问题.
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| 关 键 词： | 交通工程 机场路网 行程时间 可靠性 拥堵修正因子 成本因子 最小误差平方和 |
A Model for Calculating Reliability of Airport Road Network Considering Congestion Cost |
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| Abstract: | Traditional algorithms to calculate the reliability of travel time applied in airport road network have two main problems, which are neither considering actual conditions of road network nor airport access cost of travellers.To resolve these two problems, congested-road amendment factors and cost factors are used to develop a time estimation model for travel time to an airport.A method of minimum square error sum (LSE) is proposed to validate this improved model.The road network of Nanjing airport is taken as a case study.It shows that the LSE of the improved method is 0.57 and lower than 0.03 of traditional algorithms.Therefore, the improved method is closer to actual conditions of the road network.Reliability of travel time in the road segment of Nanjing airport is predicted between 0.69 and 0.89, while that in the road network is between 0.65 and 0.78.The improved method shows that the reliability of travel time in the road network is unevenly distributed and low in the core segments.The improved method that is proposed in this paper can be used to close the gap between the traditional algorithms and actual conditions of road network. |
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