基于超效率DEA-FKM的城市机动车信号交叉口安全评价研究
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摘要
通过相关性分析,建立了在不同条件下的交叉口安全评价指标体系。基于数据包络原理,在C~2R模型的基础上,建立超效率DEA模型,结合改进的初始簇中心的K均值聚类法(FKM),构建交叉口评价方法。以西宁市城中区10个交叉口为例进行评价,得到各交叉口安全指数和安全等级。结果表明,该方法可对城市交叉口安全性进行有效评价,采用超效率DEA指数聚类,结果避免了偏聚类现象,该研究丰富了现有交叉口安全评价方法。
Using correlation analysis, a flexible evaluation index system for intersection safety under different conditions was established. Based on the data envelopment theory and the model of C~2R, a super-efficiency DEA model was established, and by combining the improved K means clustering algorithm(FKM) which had the initial cluster center, an intersection evaluation method was constructed. Taking the 10 intersections in the central district of Xining City as an example for evaluation, the safety indexes and safety grades of each intersection were obtained. The results showed that this method could effectively evaluate the safety of urban intersections; By using super-efficient DEA index clustering, the bias clustering phenomenon was avoided and the existing intersection safety evaluation methods were enriched.
Using correlation analysis, a flexible evaluation index system for intersection safety under different conditions was established. Based on the data envelopment theory and the model of C~2R, a super-efficiency DEA model was established, and by combining the improved K means clustering algorithm(FKM) which had the initial cluster center, an intersection evaluation method was constructed. Taking the 10 intersections in the central district of Xining City as an example for evaluation, the safety indexes and safety grades of each intersection were obtained. The results showed that this method could effectively evaluate the safety of urban intersections; By using super-efficient DEA index clustering, the bias clustering phenomenon was avoided and the existing intersection safety evaluation methods were enriched.
引文
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[13]党晓旭,王元庆,吴洲豪,等.改进的区域道路交通安全广义DEA评价模型[J].交通运输系统工程与信息,2016,16(4):11-16.DOI:10.3969/j.issn.1009-6744.2016.04.002
[2]CHENG W,ZHANG N,LI W,et al.Modeling and application of pedestrian safety conflict index at signalized intersections[J].Discrete Dynamics in Nature and Society,2014,2014:207-214.DOI:10.1155/2014/314207.
[3]MACHIANI S G,ABBAS M.Safety surrogate histograms(SSH):A novel real-time safety assessment of dilemma zone related conflicts at signalized intersections[J].Accident Analysis&Prevention,2016,96:361-370.DOI:10.1016/j.aap.2015.04.024.
[4]周竹萍,王炜,任刚,等.信号交叉口行人交通冲突特性及影响因素分析[J].东南大学学报(自然科学版),2014,44(6):1294-1298.DOI:10.3969/j.issn.1001-0505.2014.06.035.
[5]于瑞康,赵晖.信号交叉口行人空间分布与人车冲突行为分析[J].山东科学,2017,30(4):80-85.DOI:10.3976/j.issn.1002-4026.2017.04.013.
[6]WANG C,STAMATIADIS N.sensitivity analysis on new simulation-based conflict metric[J].Safety Science,2016,82:399-409.DOI:10.1016/j.ssci.2015.09.023.
[7]王晨,夏井新,陆振波,等.基于微观仿真与极值理论的城市交叉口安全评价方法[J].中国公路学报,2018,31(4):288-295.DOI:10.19721/j.cnki.1001-7372.2018.04.033.
[8]LAURESHYN A,De CEUNYNCK T,KARLSSON C,et al.In search of the severity dimension of traffic events extended delta-vas traffic conflict indicator[J].Accident Analysis&Prevention,2017,98:46-56.DOI:10.1016/j.aap.2016.09.026.
[9]JI Z R,YANG X G.Comprehensive evaluation method of signalized intersection in view of multiple efficiency indexes[C]//17th Cota International Conference of Transportation Professionals,Shanghai:Tongji University,2017,691-701.
[10]刘涛.基于交通冲突技术的西安市长安区十字交叉口安全评价研究[D].西安:长安大学,2012.
[11]ZHANG G Q,CHEN J,ZHAO J Y.Safety performance evaluation of a three-leg unsignalized intersection using traffic conflict analysis[J].Mathematical Problems in Engineering.2017,10:1155.DOI:10.1155/2017/2948750.
[12]DJORDJEVI■ B,KRMAC E,MLINARIC'T J.Non-radial DEA model:A new approach to evaluation of safety at railway level crossings[J].Safety Science,2018,103:234-246.DOI:10.1016/j.ssci.2017.12.001
[13]党晓旭,王元庆,吴洲豪,等.改进的区域道路交通安全广义DEA评价模型[J].交通运输系统工程与信息,2016,16(4):11-16.DOI:10.3969/j.issn.1009-6744.2016.04.002