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Decision Support Systems for Real-World High-Speed Rail Planning 现实世界高速铁路规划决策支持系统
Journal of Transportation Engineering-asce Pub Date : 2016-05-01 DOI: 10.1061/(ASCE)TE.1943-5436.0000837
Ana L. Costa, M. Cunha, P. Coelho, H. Einstein
{"title":"Decision Support Systems for Real-World High-Speed Rail Planning","authors":"Ana L. Costa, M. Cunha, P. Coelho, H. Einstein","doi":"10.1061/(ASCE)TE.1943-5436.0000837","DOIUrl":"https://doi.org/10.1061/(ASCE)TE.1943-5436.0000837","url":null,"abstract":"AbstractThe selection of the macrolocation of new high-speed rail (HSR) systems during the planning stage affects the associated infrastructure costs. The process is influenced by the complex interaction between the HSR alignment, the technical solutions, and the characteristics of the deployment site, subject to layout restrictions. Decision support systems for the optimization of the HSR alignment are developed for addressing the requirements of large and complex real projects. The formulation includes costs, geometric constraints, connection requirements, and consideration of natural barriers such as protected land use and bodies of water, ubiquitous in real projects. The simulated annealing algorithm is implemented to address challenges of real problems and solve the optimization model. The approach is applied to a Portuguese HSR case. The solution obtained optimizes its alignment by minimizing the construction costs, consistent with existing projects worldwide, and complying with location, geometry, ...","PeriodicalId":305908,"journal":{"name":"Journal of Transportation Engineering-asce","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130698654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Exploring Different Alert Limit Strategies in the Maintenance of Railway Track Geometry 探索铁路轨道几何形态维护中的不同警戒限制策略
Journal of Transportation Engineering-asce Pub Date : 2016-04-29 DOI: 10.1061/(ASCE)TE.1943-5436.0000867
A. R. Andrade, P. F. Teixeira
{"title":"Exploring Different Alert Limit Strategies in the Maintenance of Railway Track Geometry","authors":"A. R. Andrade, P. F. Teixeira","doi":"10.1061/(ASCE)TE.1943-5436.0000867","DOIUrl":"https://doi.org/10.1061/(ASCE)TE.1943-5436.0000867","url":null,"abstract":"AbstractThis paper explores a quantitative model with different maintenance strategies to control railway track geometry degradation in Portugal. The alert limits put forward by the international standards are assessed regarding the planned and unplanned impacts associated with those limits, namely preventive maintenance and renewal costs, corrective maintenance costs, planned infrastructure delays due to changes in the maximum permissible speed, and unplanned infrastructure delays due to temporary speed restrictions. The effects of different choices for the alert limits of the main quality indicators for railway track geometry are assessed, considering a cost penalty due to delays set by the regulatory entity. Finally, a sensitivity analysis is conducted on the effect of this delay cost penalty on the optimized choice of the alert limits for both quality indicators.","PeriodicalId":305908,"journal":{"name":"Journal of Transportation Engineering-asce","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131644875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Design of LRT Signal Priority to Improve Arterial Traffic Mobility 提高主干道交通机动性的轻轨信号优先级设计
Journal of Transportation Engineering-asce Pub Date : 2016-04-18 DOI: 10.1061/(ASCE)TE.1943-5436.0000831
T. Islam, Jatinder Tiwana, A. Bhowmick, T. Qiu
{"title":"Design of LRT Signal Priority to Improve Arterial Traffic Mobility","authors":"T. Islam, Jatinder Tiwana, A. Bhowmick, T. Qiu","doi":"10.1061/(ASCE)TE.1943-5436.0000831","DOIUrl":"https://doi.org/10.1061/(ASCE)TE.1943-5436.0000831","url":null,"abstract":"AbstractTransit signal priority (TSP) is a cost-effective strategy for improving the movement of public transit vehicles, such as Light Rail Transit (LRT), buses, and streetcars, through controlled intersections. The application of TSP strategies improves the reliability and quality of service for transit vehicles with less disruption to normal traffic. The City of Edmonton in Alberta, Canada has recently extended its LRT system, which mainly runs through at-grade intersections. Edmonton’s LRT is currently operating under pre-emption, which causes significant delays to other traffic. The problem is especially pronounced during peak hours when the LRT headway is decreased to 5 min in both directions. This has led to dissatisfaction among motorists using the roadway along the LRT corridor. This paper analyzes different TSP strategies for improving the performance of the LRT corridor. A standard microsimulation tool with a ring barrier controller emulator was used to implement the strategies at a major inter...","PeriodicalId":305908,"journal":{"name":"Journal of Transportation Engineering-asce","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132490230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Flexible Stochastic Frontier Approach to Predict Spot Speed in Two-Lane Highways 双车道高速公路点速度预测的柔性随机前沿法
Journal of Transportation Engineering-asce Pub Date : 2016-04-13 DOI: 10.1061/(ASCE)TE.1943-5436.0000862
António Lobo, A. Couto, C. Rodrigues
{"title":"Flexible Stochastic Frontier Approach to Predict Spot Speed in Two-Lane Highways","authors":"António Lobo, A. Couto, C. Rodrigues","doi":"10.1061/(ASCE)TE.1943-5436.0000862","DOIUrl":"https://doi.org/10.1061/(ASCE)TE.1943-5436.0000862","url":null,"abstract":"The approach to spot speed prediction in two-lane highways followed in this study aims to evaluate the effects of a comprehensive set of speed factors, with a special focus on the geometric characteristics of the road segment to which the element belongs. Two flexible models were developed for different types of roads based on a stochastic frontier formulation in which the maximum operating speed is estimated as a function of road geometrics, and the one-sided disturbance accounts for diversity in driving behavior and vehicle characteristics, allowing the estimation of any percentile speed. The models are applicable to horizontal curves and tangents and consider both on-site characteristics and aggregated variables characterizing the road segment. The results show a clear influence of segment features on different percentile spot speeds, revealing that recent driving experience and expectations about the quality of the geometric design influence the way a driver approaches a specific road element. Additionally, this study contributes to addressing some of the limitations of existing speed models identified in the literature.","PeriodicalId":305908,"journal":{"name":"Journal of Transportation Engineering-asce","volume":"3 21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114271782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Optimal Match Method for Milepoint Postprocessing of Track Condition Data from Subway Track Geometry Cars 地铁轨道几何车轨道状态数据点后处理的最优匹配方法
Journal of Transportation Engineering-asce Pub Date : 2016-04-05 DOI: 10.1061/(ASCE)TE.1943-5436.0000859
Peng Xu, Quanxin Sun, Rengkui Liu, R. Souleyrette
{"title":"Optimal Match Method for Milepoint Postprocessing of Track Condition Data from Subway Track Geometry Cars","authors":"Peng Xu, Quanxin Sun, Rengkui Liu, R. Souleyrette","doi":"10.1061/(ASCE)TE.1943-5436.0000859","DOIUrl":"https://doi.org/10.1061/(ASCE)TE.1943-5436.0000859","url":null,"abstract":"AbstractPrecise milepoint measurement data are essential for better subway track management and maintenance practices within railroads and subways. For milepoint estimation, dead reckoning systems of some subway track geometry cars use as pesudolite markers having no unique identification information. In such cases, milepoint measurement data have to be postprocessed. However, the postprocessing is conducted in a manual fashion and is time consuming and labor intensive. This paper presents an optimal match method to automatically postprocess milepoint measurement data. The presented method consists of three submodels: (1) dynamic-programming-based distribution-pattern match model for differentiating actual markers from false-positive ones, (2) correlation-analysis-based algorithm determining milepoints for recognized markers, and (3) a linear interpolation equation for milepoint revision. The method was applied to 124 inspection runs for 15 tracks of the Beijing subway system whose track geometry car is s...","PeriodicalId":305908,"journal":{"name":"Journal of Transportation Engineering-asce","volume":"518 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130491225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Quantification of the Vertical Load Applied to the Pavement during Braking Maneuver of a Commercial Vehicle 商用车制动机动过程中路面垂直载荷的量化
Journal of Transportation Engineering-asce Pub Date : 2016-04-01 DOI: 10.1061/(ASCE)TE.1943-5436.0000834
P. Kubo, Cassio Eduardo Lima de Paiva, A. Larocca, Joshua Dawson
{"title":"Quantification of the Vertical Load Applied to the Pavement during Braking Maneuver of a Commercial Vehicle","authors":"P. Kubo, Cassio Eduardo Lima de Paiva, A. Larocca, Joshua Dawson","doi":"10.1061/(ASCE)TE.1943-5436.0000834","DOIUrl":"https://doi.org/10.1061/(ASCE)TE.1943-5436.0000834","url":null,"abstract":"AbstractFront and rear axle braking performance in a vehicle is a well-documented subject in reference to longitudinal forces, but this statement is not valid for vertical forces. To analyze this behavior, a commercial vehicle (equipped with an anti-lock braking system) was instrumented with strain gauges and one accelerometer for testing in a closed course proving ground located in Brazil. By using the vehicle’s springs as load cells, the vertical load applied to the pavement was evaluated during different braking maneuvers. Using a bidirectional ANOVA and a post hoc Tukey’s honest significant differences (HSD) test, statistical differences of the transferred load were evaluated between the vehicle’s initial speed and brake pedal position. Although it is recommended to repeat the same procedure on different vehicles and varying pavements surfaces, the results indicate that, unlike the brake pedal position, the vehicle’s initial speed does not influence the vertical load applied to the pavement during bra...","PeriodicalId":305908,"journal":{"name":"Journal of Transportation Engineering-asce","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129240598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Dynamic Interaction of Vehicle and Discontinuous Slab Track Considering Nonlinear Hertz Contact Model 考虑非线性赫兹接触模型的车辆与不连续平板轨道的动力相互作用
Journal of Transportation Engineering-asce Pub Date : 2016-04-01 DOI: 10.1061/(ASCE)TE.1943-5436.0000823
J. Sadeghi, A. Khajehdezfuly, M. Esmaeili, D. Poorveis
{"title":"Dynamic Interaction of Vehicle and Discontinuous Slab Track Considering Nonlinear Hertz Contact Model","authors":"J. Sadeghi, A. Khajehdezfuly, M. Esmaeili, D. Poorveis","doi":"10.1061/(ASCE)TE.1943-5436.0000823","DOIUrl":"https://doi.org/10.1061/(ASCE)TE.1943-5436.0000823","url":null,"abstract":"AbstractThis paper develops a new two-dimensional numerical model of vehicle/discontinuous slab track dynamic interaction. The vehicle is simulated as a multibody system with 10 degrees of freedom. The slab track is represented by a three-layer model that consists of a continuous rail layer, a discontinuous concrete slab layer, and a continuous concrete base layer. All the slab track layers are modeled by Euler-Bernoulli beam elements with finite lengths. In the New Model (NM), the wheel/rail contact is modeled by nonlinear Hertz springs for the first time. This results in an improvement in the modeling of the slab track/rolling-stock dynamic interaction. The governing differential equations of the model are derived in the time domain and solved in a coupled form. Through several numerical examples, the accuracy and the computational efficiency of the NM in various vehicle/slab track conditions is illustrated.","PeriodicalId":305908,"journal":{"name":"Journal of Transportation Engineering-asce","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121446132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 35
Predicting Collision Risk between Trucks and Interstate Overpasses 预测卡车和州际天桥之间的碰撞风险
Journal of Transportation Engineering-asce Pub Date : 2016-03-21 DOI: 10.1061/(ASCE)TE.1943-5436.0000848
X. Qin, Zhao Shen, N. Wehbe
{"title":"Predicting Collision Risk between Trucks and Interstate Overpasses","authors":"X. Qin, Zhao Shen, N. Wehbe","doi":"10.1061/(ASCE)TE.1943-5436.0000848","DOIUrl":"https://doi.org/10.1061/(ASCE)TE.1943-5436.0000848","url":null,"abstract":"AbstractA collision between a truck and an overpass bridge on an interstate highway is rare but can be catastrophic, especially if the bridge involved was designed and built in the early interstate highway era. Such collisions highlight the importance of developing a systematic and scientific method for evaluating at-risk bridges. The findings of this research offer a method for screening the safety risk of highway bridges and identifying bridges that require further review. A risk-based approach has been developed for this study from statistical models, probabilistic theories, and a comprehensive data set. Data include a five-year history of run-off-road (ROR) truck crashes, highway geometric characteristics, and traffic and weather information. The random coefficient Poisson model was used to model truck crashes so that data heterogeneity among highway segments could be captured. Monte Carlo simulation was employed to estimate the collision hazard envelope, given the uncertainties of truck size, encroac...","PeriodicalId":305908,"journal":{"name":"Journal of Transportation Engineering-asce","volume":"231 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133672245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Assessing Freeway Breakdown and Recovery: A Stochastic Model 评估高速公路破坏和恢复:一个随机模型
Journal of Transportation Engineering-asce Pub Date : 2016-03-18 DOI: 10.1061/(ASCE)TE.1943-5436.0000852
P. J. Ossenbruggen
{"title":"Assessing Freeway Breakdown and Recovery: A Stochastic Model","authors":"P. J. Ossenbruggen","doi":"10.1061/(ASCE)TE.1943-5436.0000852","DOIUrl":"https://doi.org/10.1061/(ASCE)TE.1943-5436.0000852","url":null,"abstract":"AbstractConditions at a freeway bottleneck are predicted with a two-dimensional stochastic differential equation (SDE) model of flow and speed. Stochastic behavior is assumed to be standard Brownian motion. To fully describe conditions observed in the field, it is necessary to couple the SDE model with a stochastic capacity model, thus forming a stochastic capacity-differential equation (SCDE) model. The model contains mechanisms to (1) trigger a breakdown event when the traffic flow reaches or exceeds the freeway capacity, and (2) identify when recovery takes place. Measures of freeway performance are derived from SCDE model predictions. They include breakdown probability, expressed as a function of traffic flow and time-of-day, and recovery time, i.e., the length of time the freeway remains in a congested state before returning to a free-flow state. To achieve dependable model forecasts, it is necessary to impose constraints when fitting the stochastic capacity model. The constraint condition consists o...","PeriodicalId":305908,"journal":{"name":"Journal of Transportation Engineering-asce","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124688179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Classification of Tours in the U.S. National Household Travel Survey through Clustering Techniques 利用聚类技术对美国家庭旅游调查中的旅游进行分类
Journal of Transportation Engineering-asce Pub Date : 2016-03-02 DOI: 10.1061/(ASCE)TE.1943-5436.0000845
Miriam Pirra, Marco Diana
{"title":"Classification of Tours in the U.S. National Household Travel Survey through Clustering Techniques","authors":"Miriam Pirra, Marco Diana","doi":"10.1061/(ASCE)TE.1943-5436.0000845","DOIUrl":"https://doi.org/10.1061/(ASCE)TE.1943-5436.0000845","url":null,"abstract":"AbstractTours are increasingly being considered as an appropriate unit of observation of mobility behaviors and are one of the key ideas underpinning contemporary activity-based modeling approaches. Identifying typologies of tours would benefit both modelers and decision makers, striving to set up more tailored actions aimed at promoting environmentally benign travel choices. Different a priori classifications based on activity kinds have been proposed, none of which seems clearly preferable on empirical grounds. This paper takes a complementary approach and defines a data-driven segmentation through a cluster analysis of tours that were derived from the trip records from a United States national survey. The socioeconomic characterization of each cluster is finally carried out to link travelers’ profiles with specific kinds of tours. Four main tour clusters have thus been identified: nonwork tours for compulsory activities done by young individuals, tours done by elder or retired persons, short and second...","PeriodicalId":305908,"journal":{"name":"Journal of Transportation Engineering-asce","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115232605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
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