Transportation Letters-The International Journal of Transportation Research最新文献_第10页

Incorporating travel time means and standard deviations into transportation network design problem: a hybrid method based on column generation and Lagrangian relaxation 将行程时间均值和标准差纳入交通网络设计问题：一种基于列生成和拉格朗日松弛的混合方法

IF 2.8 3区工程技术

Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-02-07 DOI: 10.1080/19427867.2023.2166212

Maocan Song , Lin Cheng

{"title":"Incorporating travel time means and standard deviations into transportation network design problem: a hybrid method based on column generation and Lagrangian relaxation","authors":"Maocan Song , Lin Cheng","doi":"10.1080/19427867.2023.2166212","DOIUrl":"10.1080/19427867.2023.2166212","url":null,"abstract":"<div><p>Travel times in real-world transportation networks are affected by many disruptions. When we conduct the network design optimization, the traffic condition and its resulting travel time variability should be taken into account. However, most of the previous network design optimizations adopted the lengths or expected travel times of links. Based on travel time means and standard deviations, we develop an arc-based model that is a nonlinear and concave integer program. By the Dantzig-Wolfe reformulation, we transform it into an equivalent column-based model that is an integer linear program with a large number of variables. Based on the column-based model, we develop a hybrid method based on column generation and Lagrangian relaxation. The restricted master problem can be settled by the linear programming solvers. The pricing subproblems incorporate independent reliable shortest path problems and a knapsack problem. In numerical experiments, the proposed method can generate feasible solutions with good integrality gaps.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":"16 2","pages":"Pages 131-143"},"PeriodicalIF":2.8,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43057276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of vehicle size on crash risk in a heterogeneous traffic scenario: a bivariate extreme value approach 异质性交通环境下车辆尺寸对碰撞风险的影响:一个二元极值方法

IF 2.8 3区工程技术

Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-02-07 DOI: 10.1080/19427867.2023.2171843

Ashutosh Kumar , Abhisek Mudgal

{"title":"Effect of vehicle size on crash risk in a heterogeneous traffic scenario: a bivariate extreme value approach","authors":"Ashutosh Kumar , Abhisek Mudgal","doi":"10.1080/19427867.2023.2171843","DOIUrl":"10.1080/19427867.2023.2171843","url":null,"abstract":"<div><p>Most traffic conflict indicators are defined for car-following scenarios where a follower vehicle interacts with a leader vehicle in one-dimensional space. However, vehicles do interact in a two-dimensional space especially in a heterogeneous traffic environment. Further, designating an interaction as risky depends on the interacting leader-follower (LF) pairs.</p></div><div><p>Conflict indicators namely Time-to-Collision (TTC) and lateral gap which quantifies longitudinal and lateral interactions respectively, were computed from video recordings at four accident black spots on four-lane divided highways. Conflict in two-dimensional space was modelled for various LF-pairs using the Bivariate Extreme Value function of these two conflict indicators. Crash risk was estimated for each LF-pairs separately. Results show that cars and light commercial vehicles exhibit higher crash risk as compared to two-wheelers and motorized three-wheelers. The proposed framework can be used for more accurate risk assessment and calibration of collision warning systems in lane free mixed traffic conditions.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":"16 2","pages":"Pages 166-181"},"PeriodicalIF":2.8,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44917595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The analysis of spatio-temporal characteristics and determinants of dockless bike-sharing and metro integration 无桩共享单车与地铁一体化的时空特征及影响因素分析

IF 2.8 3区工程技术

Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-02-07 DOI: 10.1080/19427867.2023.2170493

Junze Ma , Changjiang Zheng , Miao Yu , Jinxing Shen , Haiyan Zhang , Yanyan Wang

{"title":"The analysis of spatio-temporal characteristics and determinants of dockless bike-sharing and metro integration","authors":"Junze Ma , Changjiang Zheng , Miao Yu , Jinxing Shen , Haiyan Zhang , Yanyan Wang","doi":"10.1080/19427867.2023.2170493","DOIUrl":"10.1080/19427867.2023.2170493","url":null,"abstract":"<div><p>As an affordable form of public transit, the metro still faces first- and last-mile problems. Integration of dockless bike sharing (DBS) and the metro offers a reasonable solution to this problem. However, an in-depth exploration of the spatio-temporal characteristics and determinants of DBS–metro integration, especially meteorological indicators, is lacking. The spatiotemporal characteristics of the transfer volume on weekdays and weekends in Beijing were analyzed. Geographically weighted regression was utilized to investigate the effects of the significant determinants on the spatial variation of the transfer volume. The results indicate that the transfer volume is concentrated within the Fifth Ring Road in Beijing. The effects of education services and metro station density were negatively correlated with transfer volume. As expected, population density and enterprises positively affect transfer volume, whereas wind speed and relative humidity have negative effects. These findings provide new insights into the promotion of DBS–metro integration.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":"16 2","pages":"Pages 182-195"},"PeriodicalIF":2.8,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45290500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling car-following behavior during queue discharge at signalized intersections with countdown timer 带倒计时计时器的信号交叉口排车过程中车辆跟随行为建模

IF 2.8 3区工程技术

Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-01-02 DOI: 10.1080/19427867.2022.2159088

Bijul Raveendran , Tom V. Mathew , Nagendra R. Velaga

{"title":"Modeling car-following behavior during queue discharge at signalized intersections with countdown timer","authors":"Bijul Raveendran , Tom V. Mathew , Nagendra R. Velaga","doi":"10.1080/19427867.2022.2159088","DOIUrl":"10.1080/19427867.2022.2159088","url":null,"abstract":"<div><p>Countdown timers impact driver behavior significantly and are widely used at signalized intersections in many countries. Literature shows potential vehicle class-specific temporal and spatial variations in driver behavior in the presence of timer. Therefore, first, this paper analyzed the temporal, spatial, and vehicle class-specific impacts of timer on driver behavior in heterogeneous traffic conditions based on variations in acceleration. Second, a Long Short-Term Memory model was developed to model vehicle discharge, incorporating the heterogeneity of traffic and impacts of timer. The performance of the model was compared with that of the Intelligent Driver Model using field trajectory data from three signalized intersections in Kerala, India. The model accurately predicts the following behavior with mixed spacing errors of 0.24 to 0.35 and an average mean squared error of spacing of 1.23. The results were better than, or comparable to, results from recent data-driven car-following models and significantly better than IDM.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":"16 1","pages":"Pages 1-13"},"PeriodicalIF":2.8,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45919384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calibration and evaluation of higher order continuum model for non- lane based mixed traffic environment 无车道混合交通环境下高阶连续体模型的标定与评价

IF 2.8 3区工程技术

Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-01-02 DOI: 10.1080/19427867.2022.2160559

Hari Krishna Gaddam , K. Ramachandra Rao

引用次数: 0

High-speed railway passenger flow equilibrium among trains of common lines based on travel behavior analysis under dynamic pricing 基于动态定价下出行行为分析的高速铁路共线列车客流均衡

IF 2.8 3区工程技术

Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-01-02 DOI: 10.1080/19427867.2022.2160291

Fang-Lei Jin , Wan-Qi Tian , Lin Wang

引用次数: 0

Investigating factors affecting rural crash frequency at marginal areas around cities in Iran: a random parameter modeling approach 影响伊朗城市边缘地区农村车祸频率的因素调查：一种随机参数建模方法

IF 2.8 3区工程技术

Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-01-02 DOI: 10.1080/19427867.2022.2159101

Hamid Shamanian Esfahani , Shahriar Afandizadeh , Ali Naderan

引用次数: 0

How COVID-19 transformed the landscape of transportation research: an integrative scoping review and roadmap for future research 新冠肺炎如何改变交通研究的格局：未来研究的综合范围审查和路线图

IF 2.8 3区工程技术

Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-01-02 DOI: 10.1080/19427867.2022.2160294

Milad Haghani , Rico Merkert , Ali Behnood , Chris De Gruyter , Khashayar Kazemzadeh , Hadi Ghaderi , Zahra Shahhoseini , Vinh Thai , Elnaz Irannezhad , Behnam Fahimnia , S Travis Waller , David A Hensher

{"title":"How COVID-19 transformed the landscape of transportation research: an integrative scoping review and roadmap for future research","authors":"Milad Haghani , Rico Merkert , Ali Behnood , Chris De Gruyter , Khashayar Kazemzadeh , Hadi Ghaderi , Zahra Shahhoseini , Vinh Thai , Elnaz Irannezhad , Behnam Fahimnia , S Travis Waller , David A Hensher","doi":"10.1080/19427867.2022.2160294","DOIUrl":"10.1080/19427867.2022.2160294","url":null,"abstract":"<div><p>In the wake of the COVID-19 pandemic, scholars mobilized their efforts to address its far-reaching societal problems. With mobility restrictions being front and center of the pandemic, a new cohort of transportation science was developed within a short period of time. Here, we examine more than 400 studies related to COVID-19 published across transportation journals during 2020 and 2021. The aim is (i) to scope this newly developed segment of transportation research, (ii) outline the diversity of pandemic-related issues across various divisions of the transportation field and (iii) provide a roadmap for the future of this line of research. Common themes are identified and existing congruence and discrepancies across findings are discussed. Results show that although conventional methods of transportation research were adopted in virtually all COVID-19 studies, no pre-pandemic study was particularly instrumental in the development of this segment of transportation literature. The COVID-19 segment appears to have developed its own independent knowledge foundation, in that, it does not systemically and frequently look back at any particular pre-pandemic reference. Potential impacts of this newly developed segment on the metrics of transportation journals are quantified and discussed.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":"16 1","pages":"Pages 43-88"},"PeriodicalIF":2.8,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44712801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainable development goals and quality practices: a winning combination for customer loyalty in ride-hailing companies 可持续发展目标和质量实践：网约车公司客户忠诚度的制胜组合

IF 2.8 3区工程技术

Transportation Letters-The International Journal of Transportation Research Pub Date : 2023-07-05 DOI: 10.1080/19427867.2023.2233213

A. Boar, Ramon Bastida, F. Marimon

引用次数: 0

Characterizing lane changing behavior and identifying extreme lane changing traits 表征变道行为并识别极端变道特征

IF 2.8 3区工程技术

Transportation Letters-The International Journal of Transportation Research Pub Date : 2023-06-01 DOI: 10.1080/19427867.2022.2066856

Ishtiak Ahmed , Alan F. Karr , Nagui M. Rouphail , R. Thomas Chase , Shams Tanvir

{"title":"Characterizing lane changing behavior and identifying extreme lane changing traits","authors":"Ishtiak Ahmed , Alan F. Karr , Nagui M. Rouphail , R. Thomas Chase , Shams Tanvir","doi":"10.1080/19427867.2022.2066856","DOIUrl":"10.1080/19427867.2022.2066856","url":null,"abstract":"<div><p>This study characterizes lane changing behavior of drivers under differing congestion levels and identifies extreme lane changing traits using high-resolution trajectory data. Total lane change frequency exhibited a reciprocal relationship with congestion level, but the distribution of lane change per vehicle remained unchanged as congestion increased. On average, the speed of trajectories increased by 5.4 ft/s after changing a lane. However, this gain significantly diminished as congestion worsened. Further, the average speed of <em>lane changing</em> vehicles was 3.9 ft/s higher than those that executed no lane changes. Two metrics were employed to identify extreme lane changing behavior: critical time-to-line-crossing (TLC<sup>c</sup>) and lane changes per unit distance. The lowest 1% TLC<sup>c</sup> varied between 0.71–1.57 seconds. The highest 1% of lane change rates for all lane changing vehicles was 2.5 lane changes per 1,000 ft traveled. Interestingly, no drivers in thisdataset had both excessive lane changes <em>and</em> lane changes with low TLC<sup>c</sup>.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":"15 5","pages":"Pages 450-464"},"PeriodicalIF":2.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43740301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7