Latin American Transport Studies最新文献_第3页

Incorporating equity in the vehicle rebalancing operations of dockless micromobility services 将公平纳入无桩微型交通服务的车辆再平衡操作中

Latin American Transport Studies Pub Date : 2024-01-17 DOI: 10.1016/j.latran.2024.100009

Lina M. Villa-Zapata , Daniel Rodriguez-Roman , Juan E. Flórez-Coronel , Juan M. González-López , Alberto M. Figueroa-Medina

{"title":"Incorporating equity in the vehicle rebalancing operations of dockless micromobility services","authors":"Lina M. Villa-Zapata , Daniel Rodriguez-Roman , Juan E. Flórez-Coronel , Juan M. González-López , Alberto M. Figueroa-Medina","doi":"10.1016/j.latran.2024.100009","DOIUrl":"https://doi.org/10.1016/j.latran.2024.100009","url":null,"abstract":"<div><p>Dockless micromobility services, including shared bicycles and scooters, are emerging as sustainable travel alternatives in many cities. The optimal operation of these services, however, often depends on rebalancing operations that redistribute micromobility vehicles to service area locations with less than desired vehicle levels. Existing rebalancing models typically prioritize operational efficiency or business objectives, such as relocating vehicles to maximize served demand or profits. This study contributes a rebalancing model that incorporates the goal of improving equity-in-access to dockless micromobility through rebalancing operations. Specifically, a two-step approach is proposed to optimize the rebalancing operations of dockless micromobility services according to efficiency and equity objectives. In the first step, an optimization model is used to find micromobility vehicle distributions that maximize system-level efficiency and equity performance indicators across a specified time horizon. In the second step, a multi-objective pick-up and delivery problem is used to develop vehicle relocation plans aimed at achieving the optimal distributions determined in the first step. Numerical examples are presented to illustrate the application of the proposed methods. As part of the numerical tests, machine learning-based models trained using real-world data were shown to accurately predict equity-based performance indicators for a dockless e-scooter service in Puerto Rico.</p></div>","PeriodicalId":100868,"journal":{"name":"Latin American Transport Studies","volume":"2 ","pages":"Article 100009"},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950024924000015/pdfft?md5=154ca2bd26d837a9c132f7be60ccd2b3&pid=1-s2.0-S2950024924000015-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139487752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Built environment and crash severity in school surroundings: A study of Porto Alegre, Brazil 学校周边的建筑环境与撞车严重程度：巴西阿雷格里港研究

Latin American Transport Studies Pub Date : 2024-01-04 DOI: 10.1016/j.latran.2023.100008

Tânia Batistela Torres, Christine Tessele Nodari, Ana Margarita Larrañaga

{"title":"Built environment and crash severity in school surroundings: A study of Porto Alegre, Brazil","authors":"Tânia Batistela Torres, Christine Tessele Nodari, Ana Margarita Larrañaga","doi":"10.1016/j.latran.2023.100008","DOIUrl":"https://doi.org/10.1016/j.latran.2023.100008","url":null,"abstract":"<div><p>Foster road safety in school surroundings is an answer for high traffic injury rates and can help to build safe, healthy, and sustainable cities. This paper pursues two goals: identifying the built environment characteristics that influence the severity of traffic crashes in elementary school surroundings for a medium-sized city in Latin America, Porto Alegre (Brazil); and discussing safety measures to provide information for policy making. Ordered and unordered discrete choice models, with random parameters, were estimated in order to analyze the influence of built environment characteristics on the traffic crash severity. The modeling indicates that the severity of traffic injuries in school surroundings is influenced by school, crash, socioeconomic characteristics, and the built environment, highlighting the negative role of the number of four-way intersections and the positive impact of commercial land use for crash involving a car and at least one pedestrian or cyclist. Developing built environment strategies to encourage active mode trips should consider identifying measures to ensure safety.</p></div>","PeriodicalId":100868,"journal":{"name":"Latin American Transport Studies","volume":"2 ","pages":"Article 100008"},"PeriodicalIF":0.0,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950024923000082/pdfft?md5=0c8edd965e1cded857e9db98f4ecaf76&pid=1-s2.0-S2950024923000082-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139107587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatial matrices for short-term traffic forecasting based on time series 基于时间序列的短期交通预测空间矩阵

Latin American Transport Studies Pub Date : 2023-11-17 DOI: 10.1016/j.latran.2023.100007

Olímpio Mendes de Barros , Claudio Luiz Marte , Cassiano Augusto Isler , Leopoldo Rideki Yoshioka , Edvaldo Simões da Fonseca Junior

{"title":"Spatial matrices for short-term traffic forecasting based on time series","authors":"Olímpio Mendes de Barros , Claudio Luiz Marte , Cassiano Augusto Isler , Leopoldo Rideki Yoshioka , Edvaldo Simões da Fonseca Junior","doi":"10.1016/j.latran.2023.100007","DOIUrl":"https://doi.org/10.1016/j.latran.2023.100007","url":null,"abstract":"<div><p>Intelligent traffic systems require data and recent studies on Short-Term Traffic Forecasting (STTF) have incorporated the Spatiotemporal (ST) aspect to improve predictions. They consider road network characteristics by incorporating the impact of traffic at a given location and on its neighbouring locations. Spatial relationship weight matrices, or simply spatial matrices, facilitate direct incorporation by considering the correlation factors between various points. The Space-Time Autoregressive Integrated Moving Average Model (STARIMA) enables the application and comparison of various types of spatial matrices in ST-STTF. In this paper, we compare three types of neighbourhoods and eight types of weights to assess their impact in ST-STTF for different infrastructure and traffic characteristics. Several experiments in the road network of the city of São Paulo, Brazil, revealed that asymmetric matrices that consider the upstream and downstream traffic flow present higher accuracy than the commonly used symmetric matrices. The use of asymmetric matrices improved accuracy in 77.3% of scenarios, particularly when employing an asymmetric weight based on adjacent section speeds and travel time. Moreover, grouped matrices (GM) required less computational time to estimate the models when compared with contiguity (CN) and time lag (TL) matrices. Therefore, our results show the impacts of applying several spatial structures into short-term traffic prediction models and provide practical prediction methods for an urban network based on real traffic data, with a case study in one of the largest cities in Latin America.</p></div>","PeriodicalId":100868,"journal":{"name":"Latin American Transport Studies","volume":"1 ","pages":"Article 100007"},"PeriodicalIF":0.0,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950024923000070/pdfft?md5=94095815e203cfe802ab8c8ef71b5389&pid=1-s2.0-S2950024923000070-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134688286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using continuous traffic counts extracted from smartphone data to evaluate traffic reductions during COVID-19 pandemic in North Carolina 利用从智能手机数据中提取的连续交通量来评估北卡罗来纳州COVID-19大流行期间的交通量减少情况

Latin American Transport Studies Pub Date : 2023-11-16 DOI: 10.1016/j.latran.2023.100005

Boris Goenaga , B. Shane Underwood , Cassie Castorena , Victor Cantillo , Julian Arellana

{"title":"Using continuous traffic counts extracted from smartphone data to evaluate traffic reductions during COVID-19 pandemic in North Carolina","authors":"Boris Goenaga , B. Shane Underwood , Cassie Castorena , Victor Cantillo , Julian Arellana","doi":"10.1016/j.latran.2023.100005","DOIUrl":"https://doi.org/10.1016/j.latran.2023.100005","url":null,"abstract":"<div><p>Lockdowns to deal with the COVID-19 outbreak affected peoples' life in different dimensions. In particular, we are interested in evaluating the effects on traffic flows. For this purpose, it is necessary to accurately estimate the temporal variation of traffic flows during the pandemic period. New data collection techniques, including information from smartphones, can be used to collect this information at multiple locations of a road network. A key step in using this new data collection is the validation against more traditional measures to ensure consistency in traffic volume interpretation. This paper presents a case study whose main goals are to compare the smartphone-based traffic count predictions from the StreetLight data source against the values reported by traditional methods of traffic quantification and estimate reductions and recovery rates on traffic volumes in North Carolina during the COVID-19 pandemic. The results show that the largest reductions in traffic flows occurred mainly during the first three months of lockdown.</p></div>","PeriodicalId":100868,"journal":{"name":"Latin American Transport Studies","volume":"1 ","pages":"Article 100005"},"PeriodicalIF":0.0,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950024923000057/pdfft?md5=f7f3beebb0a8e580075dc22903f5509a&pid=1-s2.0-S2950024923000057-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134843561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Challenges in promoting bike-bus integration in developing countries: Case study of Fortaleza, Brazil 在发展中国家促进自行车-公共汽车一体化的挑战:以巴西福塔莱萨为例

Latin American Transport Studies Pub Date : 2023-11-16 DOI: 10.1016/j.latran.2023.100004

Matheus Fontenelle Siqueira, André Soares Lopes, Taís Barreto Costa, Carlos Felipe Grangeiro Loureiro

{"title":"Challenges in promoting bike-bus integration in developing countries: Case study of Fortaleza, Brazil","authors":"Matheus Fontenelle Siqueira, André Soares Lopes, Taís Barreto Costa, Carlos Felipe Grangeiro Loureiro","doi":"10.1016/j.latran.2023.100004","DOIUrl":"https://doi.org/10.1016/j.latran.2023.100004","url":null,"abstract":"<div><p>Cycling to access or egress from public transport (PT) systems potentially improves accessibility to opportunities for PT-dependent populations, which can reduce socio-spatial inequalities. While developing countries may benefit from the affordability and sustainability of bicycle-transit integration, current scientific research on the topic focuses mostly on metropolises in the industrialized world. Furthermore, Global South cities that invest in such systems see their population resistant to adopting the solutions well received in the North. This paper adapts a bicycle-transit conceptual model to the reality of Latin American metropolises to serve as a characterization tool to empirically investigate the barriers and challenges inhibiting large developing cities from benefiting from it. Fortaleza, a mid-sized Brazilian metropolis with recent significant investments in bicycle-transit integration, serves as a case study. All analyses are based on surveys with bike-sharing and bike-parking facilities users, associated with data from bus-system smartcard validation. The analyses aim at both supply and demand conditions to evaluate their policy implications. The challenges faced by North and Global South cities regarding bicycle-transit integration seem to be similar in terms of infrastructural necessities and outcomes (travel speeds, road safety, and comfort); however, they are significantly different in terms of hindering costs and public safety, which affect users’ behavior. Discussions revolve around how to attract new users while keeping costs at bay, as well as how public safety plays a key role in the Latin American context.</p></div>","PeriodicalId":100868,"journal":{"name":"Latin American Transport Studies","volume":"1 ","pages":"Article 100004"},"PeriodicalIF":0.0,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950024923000045/pdfft?md5=18f561392092eb7fb3b462734fb4dbe4&pid=1-s2.0-S2950024923000045-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134688285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Risks and opportunities for the sustainability of ridesourcing services in Latin-American small and medium-sized cities: Analyzing perceptions of stakeholders of mobility 拉丁美洲中小城市拼车服务可持续性的风险与机遇:分析出行利益相关者的看法

Latin American Transport Studies Pub Date : 2023-11-16 DOI: 10.1016/j.latran.2023.100003

Brenda Medeiros Pereira , Alejandro Ruiz-Padillo

{"title":"Risks and opportunities for the sustainability of ridesourcing services in Latin-American small and medium-sized cities: Analyzing perceptions of stakeholders of mobility","authors":"Brenda Medeiros Pereira , Alejandro Ruiz-Padillo","doi":"10.1016/j.latran.2023.100003","DOIUrl":"https://doi.org/10.1016/j.latran.2023.100003","url":null,"abstract":"<div><p>Ridesourcing services are rapidly expanding in cities around the world. Their implementation in the absence of prior planning of the operation, or without clear rules for management and inspection, can generate negative impacts on urban mobility, as well as opportunities that are not taken advantage of in the best way. However, there are few studies that have measured the impacts of these services on mobility in cities. The ones that exist have targeted large cities in developed countries. This work aims to measure the risks and opportunities created by the insertion of application-based transport in Latin-American small-sized cities. The use of a hybrid qualitative-quantitative analysis methodology is proposed, with uncertainty modeling supported by fuzzy logic, which was applied in a case study of Cachoeira do Sul, a city located in Southern Brazil. The results revealed a positive perception of the use of ridesourcing services, with opportunities being rated higher than risks, especially related to new options for mobility services. The risks associated with the planning, management, and operation of coordinated urban mobility stood out, in addition to those concerning the competition of ridesourcing services with public transport and taxis. The results obtained here should assist in the formulation of appropriate public policies for ridesourcing services in small Latin-American cities.</p></div>","PeriodicalId":100868,"journal":{"name":"Latin American Transport Studies","volume":"1 ","pages":"Article 100003"},"PeriodicalIF":0.0,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950024923000033/pdfft?md5=ca02795077bee9328105e94e21a91d3a&pid=1-s2.0-S2950024923000033-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134688284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potential market of freight demand management 货运需求管理的潜在市场

Latin American Transport Studies Pub Date : 2023-11-16 DOI: 10.1016/j.latran.2023.100006

José Holguín-Veras , Felipe Aros-Vera , Oriana Calderón

{"title":"Potential market of freight demand management","authors":"José Holguín-Veras , Felipe Aros-Vera , Oriana Calderón","doi":"10.1016/j.latran.2023.100006","DOIUrl":"https://doi.org/10.1016/j.latran.2023.100006","url":null,"abstract":"<div><p>The paper's main objective is to quantify the potential market for Freight Demand Management (FDM) in metropolitan areas. To this effect, the authors define FDM and describe the various initiatives that could be undertaken to reduce the externalities produced by freight traffic. These changes involve altering the demand patterns enacted by the receivers of supplies. The literature on freight behavior research is reviewed to identify the industry segments most inclined to participate in FDM. Having identified the industry sectors of interest for FDM programs, the authors use freight trip generation models and publicly available data to quantify the freight trip generation for the industry sectors deemed to be the ideal target of FDM initiatives. These estimates are obtained for five large metropolitan statistical areas and a sample of representative medium to small metropolitan statistical areas of different sizes in the US. The paper concludes with a discussion of policy implications and chief results.</p></div>","PeriodicalId":100868,"journal":{"name":"Latin American Transport Studies","volume":"1 ","pages":"Article 100006"},"PeriodicalIF":0.0,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950024923000069/pdfft?md5=8d3da37028572c8df91f107c30470b52&pid=1-s2.0-S2950024923000069-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134688283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the Transport Landscape in Belo Horizonte, Brazil 探索巴西贝洛奥里藏特的交通景观

Latin American Transport Studies Pub Date : 2023-11-10 DOI: 10.1016/j.latran.2023.100001

Leise Kelli de Oliveira, Rodrigo Affonso Albuquerque Nobrega, Pedro de Souza Coelho

引用次数: 0

Equity in e-commerce accessibility: Gaps and opportunities for a research agenda 电子商务可访问性的公平性:研究议程的差距和机会

Latin American Transport Studies Pub Date : 2023-11-10 DOI: 10.1016/j.latran.2023.100002

Luísa Tavares Muzzi de Sousa , Leise Kelli de Oliveira , Lilian dos Santos Fontes Pereira Bracarense

引用次数: 0