Modelling the effects of road pricing on traffic using ERP traffic data

Singapore’s Electronic Road Pricing (ERP) system involves time-variable charges which are intended to spread the morning traffic peak. The charges are revised every three months and thus induce regular motorists to re-think their travel decisions. ERP traffic data, captured by the system, provides a valuable source of information for studying motorists’ travel behaviour. This paper proposes a new modelling methodology for using these data to forecast short-term impacts of rate adjustment on peak period traffic volumes. Separate models are developed for different categories of vehicles which are segmented according to their demand elasticity with respect to road pricing. A method is proposed for estimating the maximum likelihood value of preferred arrival time (PAT) for each vehicle’s arrivals at a particular ERP gantry under different charging conditions. Iterative procedures are used in both model calibration and application. The proposed approach was tested using traffic datasets recorded in 2003 at a gantry located on Singapore’s Central Expressway (CTE). The model calibration and validation show satisfactory results.     

Vertical separation as means to establish interoperability in road tolling in Europe

As more European roads become tolled by various means, an increasing share of road users become subject to more than one tolling scheme in their regular driving. This can be especially burdensome for long distance hauliers, who may pass several countries and tolled motorway systems during the course of 1 day. For this reason, a range of projects have been initiated attempting to increase the level of interoperability between tolling systems, many of which with only limited success. By analyzing current incentives, costs and benefits for toll operators and road users, we conclude firstly that the current level of interoperability is likely to be lower than socially optimal, and secondly that a direct regulation making the provision of interoperability mandatory is likely to be in excess of what is socially optimal. We argue that vertically separating the monopolistic toll operators could be a cost-efficient way to achieve a socially optimal level of interoperability as a equilibrium market outcome.     

兰州新区安秦快速路的规划设计与研究

该文以兰州新区规划的快速通道-安秦路为例,论述了城市快速路规划设计的总体思路和设计原则,同时重点阐述了快速路的线形、出入口设计、断面结构形式及与沿线生态环境的自然和谐。     

道路施工安全管理信息系统的建设与应用

从道路施工安全管理信息系统的建设情况和应用情况两方面,阐述系统在2010上海世博会期间为上海道路交通管理做出的贡献和取得的成效。     

橡胶混凝土物理力学性能研究

为研究橡胶颗粒对普通混凝土性能的变化趋势,论文分析了不同橡胶颗粒掺量的混凝土路用性能．通过密度、抗折强度、抗压强度及劈裂强度试验,研究掺橡胶颗粒的混凝土基本力学性能及物性的变化规律;采用噪声仪研究了橡胶混凝土的减振降噪效果．研究结果表明：随着橡胶颗粒掺量的增加,橡胶混凝土的密度、抗折、抗压及劈裂强度、压折比及噪声水平逐...     

国产环氧沥青混凝土钢桥面铺装施工适用性研究

为提高国产环氧沥青混凝土在钢桥面铺装中的施工质量,本文对其施工性能进行研究。通过室内沥青混合料马歇尔试验及沥青粘度试验,对国产环氧沥青混凝土与美国环氧沥青混凝土的常温养护、模拟夏季养护马歇尔稳定度及沥青粘度等性能进行比较,提出了国产环氧沥青混凝土钢桥面铺装施工季节、养护时间等方面的建议。     

对于哈尔滨市地区道路结构适用性的比选研究

从哈尔滨市常用筑路材料的特性入手,系统介绍了该地区的常用道路结构组合,通过对其弯沉、拉应力、容许拉应力等检测指标及造价的分析比较,提出了各种道路结构的适用性、缺点,给出了适用于哈尔滨市地区的道路结构方案。     

浅析筑路机械在高速公路养护中的科学管理

对筑路机械设备管理中存在的问题进行了分析,提出科学管理筑路机械设备的方法。     

超大粒径沥青混合料高温稳定性研究

为了研究超大粒径沥青混合料(SLSM)的高温稳定性,在借鉴大粒径沥青混合料(LSAM)研究方法的基础上,确定SLSM的级配,并以SBS改性沥青作为粘结材料,利用车辙试验的动稳定度评价SLSM的高温性能,并与普通密级配沥青混合料进行比较。结果表明:超大粒径沥青混合料的动稳定度比普通密级配沥青混合料的大17.07%,用作沥青路面的下面层满足要求。     

多级模糊综合评判在城市道路横断面方案评价中的应用

通过分析影响城市道路横断面方案选择的因素,并按照因素间的并列关系或从属关系,建立了影响因素的多层次结构模型;采用层次分析法确定各影响因素的权重,并根据工程实践经验提供了影响因素评语的确定依据;从而建立了城市道路横断面方案评价的多级模糊综合评判模型。工程实例分析表明,多级模糊综合评判方法是合理可行的。