Transportation Research Record最新文献

Spatial Transferability of Expansion Factors for Estimating Pedestrian Volume at Intersections. 十字路口行人量估算中扩展因子的空间可转移性

IF 1.8 4区工程技术

Transportation Research Record Pub Date : 2025-09-08 eCollection Date: 2025-11-01 DOI: 10.1177/03611981251350639

Lucas Tito Pereira Sobreira, Bruce Hellinga

{"title":"Spatial Transferability of Expansion Factors for Estimating Pedestrian Volume at Intersections.","authors":"Lucas Tito Pereira Sobreira, Bruce Hellinga","doi":"10.1177/03611981251350639","DOIUrl":"https://doi.org/10.1177/03611981251350639","url":null,"abstract":"Pedestrian exposure at intersections is a key input for jurisdictions to develop pedestrian-centric strategies. Exposure is typically expressed as the annual average daily pedestrian traffic (AADPT). The expansion factor method is the most common technique employed to estimate AADPT, consisting of the expansion of short-term counts (STCs) using factors calculated from sites with continuous counts (CCs). However, jurisdictions often lack sufficient CCs to determine expansion factors, which motivated this work of assessing the spatial transferability of expansion factors. This paper examines the spatial transferability across three jurisdictions in Ontario, Canada, with similar school holiday and weather seasonality, and one jurisdiction in Arizona, U.S.A., with different characteristics. It was assumed that the \"base jurisdiction\" has CCs available, while the \"target jurisdiction\" has only STC sites, and applies expansion factors from the base jurisdiction. Two approaches were tested: the single factor method, averaging expansion factors across all sites in the base jurisdiction, and modeling methods, which assign STC sites to factor groups based on models developed in the base jurisdiction. The single factor method showed acceptable transferability within the Ontario jurisdictions, with an average absolute increase of 2.3% (8.7% relative increase) in the mean absolute percent error of AADPT achieved when comparing the spatially transferred factors to those obtained when the base and target jurisdictions are the same. However, poor transferability was observed between jurisdictions with differing characteristics. The application of modeling methods yielded inconsistent results, possibly because of the limited number of sites available in this study, and requires further investigation.","PeriodicalId":23279,"journal":{"name":"Transportation Research Record","volume":"2679 11","pages":"939-956"},"PeriodicalIF":1.8,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13046250/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147623701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mobility On Demand: What About the Weekend? 按需出行：周末怎么办？

IF 1.8 4区工程技术

Transportation Research Record Pub Date : 2025-08-15 eCollection Date: 2025-11-01 DOI: 10.1177/03611981251346454

Grace O Kagho, Milos Balac, Kay W Axhausen

{"title":"Mobility On Demand: What About the Weekend?","authors":"Grace O Kagho, Milos Balac, Kay W Axhausen","doi":"10.1177/03611981251346454","DOIUrl":"https://doi.org/10.1177/03611981251346454","url":null,"abstract":"Mobility on demand (MoD) services like ride-hailing, ride-sharing, and car-sharing are changing travel behavior by providing increased options and flexibility. These services can be best understood and planned for through the use of detailed computer simulations. However, existing simulations predominantly focus on modeling average working days, characterized by high and predictable travel demand. This approach overlooks the distinct travel patterns observed during weekends. Unlike weekdays, which feature pronounced peak hours, weekend travel is distributed more evenly throughout the day, particularly on Saturdays. This study compares the differences in travel demand patterns between weekends and weekdays and their possible impact on policies drawn from MoD simulations. Using an agent-based simulation framework MATSim, we simulate the introduction of an autonomous mobility on demand (aMoD) service to Zurich, Switzerland, and its environs. We then compare weekday and weekend travel patterns highlighting unique aspects of weekend travel and their implications for MoD service operations. The findings suggest that transport policies should account for the unique characteristics of weekend travel. The results provide insights into modal shifts, showing how more public transport and private vehicle trips could be replaced by MoD services during weekends, especially for long-distance travel. Furthermore, results show that optimal fleet sizes vary between weekdays and weekends owing to differences in demand. While weekends see higher MoD demand, wait times don't necessarily increase. However, longer detours for pickups may extend travel times. Accounting for weekend travel in simulations helps ensure policy planning supports reliable service while balancing wait times, travel times, occupancy, and operational costs.","PeriodicalId":23279,"journal":{"name":"Transportation Research Record","volume":"2679 11","pages":"68-84"},"PeriodicalIF":1.8,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13046270/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147623714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Barriers, Adoption, and Use of a Bike-Sharing System: A Market-Segment Approach to Current and Potential Users in Montréal, Canada. 自行车共享系统的障碍、采用和使用：对加拿大montracimal现有和潜在用户的市场细分方法。

IF 1.8 4区工程技术

Transportation Research Record Pub Date : 2025-06-26 eCollection Date: 2025-09-01 DOI: 10.1177/03611981251340377

Panagiotis Goudis, Rodrigo Victoriano-Habit, Thiago Carvalho, Ahmed El-Geneidy

{"title":"Barriers, Adoption, and Use of a Bike-Sharing System: A Market-Segment Approach to Current and Potential Users in Montréal, Canada.","authors":"Panagiotis Goudis, Rodrigo Victoriano-Habit, Thiago Carvalho, Ahmed El-Geneidy","doi":"10.1177/03611981251340377","DOIUrl":"https://doi.org/10.1177/03611981251340377","url":null,"abstract":"Bike-sharing systems have gained considerable traction as a solution to many urban transport challenges. (Note that, in this paper, \"bike\" means \"bicycle,\" not \"motorbike\".) Limited research has explored the market dynamics driving bike-sharing usage among different population segments. This study is the first to apply a market-segmenting approach to analyze factors influencing both existing and potential users' adoption of a bike-sharing system in Montréal, Canada. Utilizing a bilingual online survey conducted in spring, 2024, this research investigates the factors that limit or prevent the use of a large-scale bicycle-sharing system-Bixi-among different population groups. This work applies factor and k-means cluster analyses to identify distinct profiles within existing users (N = 561) and non-users (N = 763) of Bixi. The findings reveal key barriers faced both by users and non-users, particularly highlighting the need for expanding station availability in underserved areas. These findings address important equity issues. Measures to address cost and membership-related challenges would have the greatest impact on bringing low-income non-users into the system, while improving mobile technology accessibility would have the most significant effect on increasing adoption among younger, low-income groups. These insights can be of interest to policy developers aiming to expand bike-sharing systems service quality, enhance its resilience, and promote more equitable outcomes.","PeriodicalId":23279,"journal":{"name":"Transportation Research Record","volume":"2679 9","pages":"788-801"},"PeriodicalIF":1.8,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13046275/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147623694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Behavior of a Person-Following Robot in Pedestrian Environments: Laboratory Experimentation and Simulation. 行人环境中人跟随机器人的行为：实验室实验与模拟。

IF 1.8 4区工程技术

Transportation Research Record Pub Date : 2025-04-30 eCollection Date: 2025-08-01 DOI: 10.1177/03611981251332248

Ruowei Li, Farah Ghizzawi, Tho V Le, Matthew J Roorda

{"title":"Behavior of a Person-Following Robot in Pedestrian Environments: Laboratory Experimentation and Simulation.","authors":"Ruowei Li, Farah Ghizzawi, Tho V Le, Matthew J Roorda","doi":"10.1177/03611981251332248","DOIUrl":"https://doi.org/10.1177/03611981251332248","url":null,"abstract":"As e-commerce continues to grow, the demand for fast and efficient last-mile delivery is increasing. Person-following robots is a solution that is now beginning to be deployed to assist foot couriers in performing last-mile delivery tasks in public areas, such as underground pedestrian walkways and malls. Although they have proved their capacity to operate successfully in uncrowded and highly regulated spaces like warehouses, it is still uncertain whether their performance would be satisfactory in crowded, unstructured, and complex environments. This study proposes a simulation approach for evaluating the performance of a commercial person-following delivery robot in dynamic pedestrian environments. Laboratory experiments were conducted to understand the robot's operating characteristics. Based on empirical observation, a computer simulation model of the robot was developed in a pedestrian simulator, which was calibrated and validated with experimental data. This model was expanded to include pedestrian crowds such that the performance of the robot was evaluated under various crowding scenarios. Research limitations and recommendations for future work are identified.","PeriodicalId":23279,"journal":{"name":"Transportation Research Record","volume":"2679 8","pages":"66-87"},"PeriodicalIF":1.8,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13046279/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147623659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Is there a comorbid relationship between temporomandibular disorders and otologic signs/symptoms?: An umbrella review. 颞下颌关节紊乱与耳科体征/症状之间是否存在合并关系？综述。

IF 1.8 4区工程技术

Transportation Research Record Pub Date : 2025-01-01 Epub Date: 2022-05-11 DOI: 10.1080/08869634.2022.2069639

Amelia Qin'An Anya Chew, Leonardo Saigo, Adrian Ujin Yap

{"title":"Is there a comorbid relationship between temporomandibular disorders and otologic signs/symptoms?: An umbrella review.","authors":"Amelia Qin'An Anya Chew, Leonardo Saigo, Adrian Ujin Yap","doi":"10.1080/08869634.2022.2069639","DOIUrl":"10.1080/08869634.2022.2069639","url":null,"abstract":"Objective: This umbrella review (UR) explored the possible associations between temporomandibular disorders (TMDs) and otologic signs/symptoms (OSs) and established the potential impact of TMD interventions on OSs.Methods: A systematic review of systematic reviews (SRs)/meta-analyses (MAs) was conducted according to the PRISMA guidelines and Joanna Briggs Institute UR protocol. Electronic search of the PubMed, Scopus, Web of Science, and Open Grey databases was conducted and the quality of the identified studies was assessed using the AMSTAR2 criteria.Results: Out of 923 and 157 articles screened for the first and second focus questions respectively, a total of 8 SRs/MAs fulfilled the eligibility criteria. The prevalence of OSs in TMD patients and contrariwise varied substantially up to 85.0-95.0%. Available evidence indicates that TMDs are associated with OSs, and TMD treatment reduced OSs.Conclusion: Findings suggest that a comorbid relationship between TMDs and OSs exists, and therapeutic TMD interventions improve OSs.","PeriodicalId":23279,"journal":{"name":"Transportation Research Record","volume":"2180 1","pages":"8-21"},"PeriodicalIF":1.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91386858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Acute Bilateral Optic Neuropathy: A Rare Presentation of Wernicke Encephalopathy. 急性双侧视神经病变:罕见的韦尼克脑病表现。

IF 1.6 4区工程技术

Transportation Research Record Pub Date : 2023-12-01 Epub Date: 2022-03-23 DOI: 10.1097/WNO.0000000000001527

Kristine M Nachbor, Olufemi E Adams, Chase A Liaboe, Anne S Abel

引用次数: 0

Simulation Study of Pedestrians Evacuation Considering Aggressive Behavior 考虑攻击行为的行人疏散仿真研究

4区工程技术

Transportation Research Record Pub Date : 2023-11-13 DOI: 10.1177/03611981231207843

Qinghua Mao, Yang Li, Rongfu Yu

{"title":"Simulation Study of Pedestrians Evacuation Considering Aggressive Behavior","authors":"Qinghua Mao, Yang Li, Rongfu Yu","doi":"10.1177/03611981231207843","DOIUrl":"https://doi.org/10.1177/03611981231207843","url":null,"abstract":"Conflict during an evacuation may turn into aggressive behavior and create problems for evacuation. To study the influence of attack behaviors such as pushing and shoving on evacuation and the evacuation law, an extended cellular automata model is developed in this paper. In the model, pedestrian movement is influenced by static, dynamic, and attack floor fields. In addition, pedestrian vision is influenced by the direction and location of movement of surrounding pedestrians, and pedestrians adopt different coping strategies for attacks: avoidance detour, or imitation. Attacker movement and aggressive behavior are also studied. Numerical simulations are conducted to discuss the pedestrian evacuation problem under attack behavior. The effects of the evacuation process, attack field sensitivity coefficient, location of fallen pedestrians, pedestrian density, number of initial attackers, initial attacker location, and pedestrian imitation ratio on evacuation time and number of fallen pedestrians are analyzed. The simulation results show that an appropriate increase in the impact of the attack field can slow down the congestion, that is, the evacuation time is the fastest at k A = 0.5. The evacuation time is faster when the room is full of normal pedestrians or full of attacking pedestrians. The number of casualty pairs is high when the initial position of the attacker is in the middle of the inner side of the room. The results of the study can provide recommendations and guidance for the formulation of evacuation strategies for pushing and shoving type attacks and reducing casualties.","PeriodicalId":23279,"journal":{"name":"Transportation Research Record","volume":"132 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136351564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Analyzing Freeway Safety Influencing Factors Using the CatBoost Model and Interpretable Machine-Learning Framework, SHAP 基于CatBoost模型和可解释机器学习框架的高速公路安全影响因素分析

4区工程技术

Transportation Research Record Pub Date : 2023-11-13 DOI: 10.1177/03611981231208903

Jiaqi Li, Xuesong Wang, Xiaohan Yang, Qi Zhang, Hanzhong Pan

{"title":"Analyzing Freeway Safety Influencing Factors Using the CatBoost Model and Interpretable Machine-Learning Framework, SHAP","authors":"Jiaqi Li, Xuesong Wang, Xiaohan Yang, Qi Zhang, Hanzhong Pan","doi":"10.1177/03611981231208903","DOIUrl":"https://doi.org/10.1177/03611981231208903","url":null,"abstract":"Exploring and analyzing safety influencing factors can guide targeted traffic safety management. Traditional traffic safety models are aimed at specific data problems and making adjustments to the model structure, which lack focus on predictive ability and have limited information on the analysis of influencing factors. In recent years, machine-learning methods have opened new avenues in modeling that have higher prediction accuracy, can identify complex nonlinear relationships, and can overcome over- and under-dispersion and correlation. Machine-learning methods, however, pose the problem of limited interpretability. The interpretable machine-learning framework SHAP can be an effective solution, which can not only reflect the influence of features in each sample but also generate global interpretation. This study established gradient boosting models including the CatBoost and XGBoost models as traffic safety models, which were compared with a traditional NB regression model and a zero-inflated negative binomial regression model. SHAP was used to analyze several safety influencing factors, including geometric design features, traffic operation characteristics, time of day, and land use. Results confirmed that the CatBoost model has better prediction ability and is a more suitable traffic safety model than the traditional negative binomial regression model. Among the key findings were that ramp type is the most important factor in freeway crash frequency; curve presence has a great positive impact, while truck proportion has a great negative impact; and traffic volume is highly correlated with truck proportion. These findings can provide theoretical support for safety operation management and targeted improvement measures for freeways.","PeriodicalId":23279,"journal":{"name":"Transportation Research Record","volume":"134 17","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136352099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Numerical Analysis of Error From Sampling of Alternatives in Logit-Based Demand Forecasting Models with Massive Choice Sets 基于logistic的海量选择集需求预测模型中备选方案抽样误差的数值分析

4区工程技术

Transportation Research Record Pub Date : 2023-11-10 DOI: 10.1177/03611981231190634

Max Gardner, Paul Waddell

{"title":"Numerical Analysis of Error From Sampling of Alternatives in Logit-Based Demand Forecasting Models with Massive Choice Sets","authors":"Max Gardner, Paul Waddell","doi":"10.1177/03611981231190634","DOIUrl":"https://doi.org/10.1177/03611981231190634","url":null,"abstract":"Use of the multinomial logit (MNL) functional form is widespread in transportation and land use demand modeling. As the state-of-the-art evolves away from aggregate forecasting and toward activity-based models and microsimulation, MNL models are being asked to accommodate increasingly large choice sets. Different strategies exist to address the challenge of estimating models with very large choice sets, but perhaps none is as commonly employed as sampling of alternatives. The effect of sampling of alternatives on parameter estimation has received considerable attention in the scientific literature. Yet comparatively little quantitative research exists that examines the issues that arise when the same sampling strategies are applied in the context of forecasting. In this study we conducted an analysis of the effect of sampling of alternatives in discrete choice models for disaggregate location choice forecasting. First, a novel measure of forecast error was defined and then used to quantify the extent of the problem as a function of sample rate, model error, and size of the universe of alternatives. Finally, we explored the potential for strategic sampling techniques to reduce the error observed under simple random sampling. In general, we found that the proportion of aggregate demand that was misallocated owing to sampling of alternatives was actually reduced as the size of the universe of alternatives increased. Additionally, simple random sampling was shown to outperform importance sampling in most scenarios. These findings suggest that error resulting from random sampling of alternatives is less of a problem for logit-based microsimulation models than previously assumed.","PeriodicalId":23279,"journal":{"name":"Transportation Research Record","volume":" 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135141657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Equity of Highway Noise Exposure 公路噪声暴露公平性

4区工程技术

Transportation Research Record Pub Date : 2023-11-09 DOI: 10.1177/03611981231205886

Thor Dodson, Viktoriia Dunleavy

{"title":"Equity of Highway Noise Exposure","authors":"Thor Dodson, Viktoriia Dunleavy","doi":"10.1177/03611981231205886","DOIUrl":"https://doi.org/10.1177/03611981231205886","url":null,"abstract":"This article discusses the inequities in exposure to highway noise, which can have adverse effects on health, productivity, and quality of life. If certain subpopulations tend to live near highways because of structural inequality, gentrification, lack of social capital, or other reasons, then highway noise can contribute to inequity in a systematic way. The authors developed an online mapping application, the Noise Inequity Identification Tool (NIIT), to visualize the noise damage cost of noise pollution from road segments, the noise-equity ratios at the county level, and the population distribution of various demographics. The methodology combines estimates of roadway traffic noise levels with the cost of noise damage from the hedonic pricing literature and estimates of the number of households affected to estimate the noise damage cost for each road segment in the U.S. The cost of the noise damage accruing to each demographic is then aggregated over a larger region and normalized by their proportion of the population to calculate the “noise-equity ratio,” revealing substantial inequities in highway noise exposure between demographics at a variety of spatial scales. By using this tool, planners and practitioners can easily identify regions with existing highway noise exposure inequities and pinpoint roadways with excessive noise damage costs to recommend potential externality mitigation projects.","PeriodicalId":23279,"journal":{"name":"Transportation Research Record","volume":"103 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135242820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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