Experimental Study of Effects of Travel Time Distribution Information on Dynamic Route Choice Behavior

This study focuses on the possibility that providing travelers with information on travel time distribution, along with the existing travel time information, might affect their decision making and enhance traffic control. As an initial step to confirm the effectiveness of travel time distribution information, we use a laboratory experiment to obtain panel data of route choices when information is provided. The rationality of the behavior of the respondents and the characteristics of the route choice are first analyzed by aggregation analysis and then statistically examined by specifying a mixed logit route choice model. As a result, it is revealed that both travel time information and maximum travel time information significantly affect route choice behavior when a penalty is imposed for late arrival.     

元谋至武定高速公路地质选线理念实践

元谋至武定高速公路（以下简称“本项目”）处于云南滇中红层地区,该地区地质地貌复杂,不良地质类型多样,潜在危害严重,本项目在路线设计过程中贯彻了地质选线理念,针对各种不良地质的规模及特点采取了避让、处治等措施,有效降低了本项目的工程造价,增加了地质灾害安全性,为工程的建设营运打下了良好的基础.     

纯电动客车两档变速器传动比优化仿真分析

文章以某纯电动客车为研究对象,根据城市-郊区道路条件,驱动电机和电动客车整备参数已定,满足动力性能前提,以两档变速器传动比为变量,利用人群搜索算法(SOA)找到与电机相匹配的传动比,优化能量利用率,提出一种优化设计思路,并利用仿真软件进行仿真分析.仿真结果表明,此设计优化思路为两档纯电动客车设计出最优的传动比,满足道路...     

生态影响综合评价方法在公路选线中的应用

针对高速公路建设项目的特点,从指标选取入手,采取定量分析的手段,对比研究了两条线路工程建设对生态环境的影响程度。结果表明,用植被覆盖率、生物量、滞洪能力、土壤变化、农田占用、水土流失量等6项指标来定量分析生态影响程度效果较好,采用综合生态影响评价指数法确定线路的舍取是可行的。     

基于需求划分的带软时间窗的路径优化方法

针对带有时间窗约束的车辆路径问题(Vehicle Routing Problem With Time Windows,VRPTW)的NP特征,以非完全连通配送网络为研究对象,用带有软时间窗约束的整体配送费用最小为目标,提出了一种基于需求的城市动态划分方法,有效的减少了路径的组合规模,并且用遗传算法将其实现,通过改进的Dijkstra算法求取其基于动态划分的最优配送路径集,最后计算示例验证了本文方法的有效性。     

京福国道主干线福建省境内西段路线方案技术经济论证

从技术可行性与经济合理性两个方面，对京福国道主干线福建省境内西段路线方案进行分析论证，克服了公路路线规划中通常只进行技术可行性论证的缺陷，为从事道路规划提供一条创新思路。     

Transit stop inspection and maintenance scheduling: A GPU accelerated metaheuristics approach

Bus stops are integral elements of a transit system and as such, their efficient inspection and maintenance is required, for proper and attractive transit operations. Nevertheless, spatial dispersion and the extensive number of bus stops, even for mid-size transit systems, complicates scheduling of inspection and maintenance tasks. In this context, the problem of scheduling transit stop inspection and maintenance activities (TSIMP) by a two-stage optimization approach, is formulated and discussed. In particular, the first stage involves districting of the bus stop locations into areas of responsibility for different inspection and maintenance crews (IMCs), while in the second stage, determination of the sequence of bus stops to be visited by an IMC is modelled as a vehicle routing problem. Given the complexity of proposed optimization models, advanced versions of different metaheuristic algorithms (Harmony Search and Ant Colony Optimization) are exploited and assessed as possible options for solving these models. Furthermore, two variants of ACO are implemented herein; one implemented into a CPU parallel computing environment along with an accelerated one by means of general-purpose graphics processing unit (GPGPU) computing. The model and algorithms are applied to the Athens (Greece) bus system, whose extensive number of transit stops (over 7500) offers a real-world test bed for assessing the potential of the proposed modelling approach and solution algorithms. As it was shown for the test example examined, both algorithms managed to achieve optimized solutions for the problem at hand while there were fund robust with respect to their algorithmic parameters. Furthermore, the use of graphics processing units (GPU) managed to reduce of computational time required.     

永福至鹿寨公路潮水至波寨段路线方案比选分析

文章结合广西公路旧路改建工作实际,介绍了存在复杂交叉关系的旧路改建项目的基本特点及解决方法,并以永福至鹿寨公路潮水至波寨段工程为例,提出了不同的路线设计方案,对比分析各方案对路线选线的影响,为今后广西区域旧路改建项目的选线工作提供参考。