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Impact of COVID-19 outbreak and vaccination on ride-sharing services: a social media analysis COVID-19疫情和疫苗接种对拼车服务的影响:社交媒体分析
IF 3.3 3区 工程技术
Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-07-02 DOI: 10.1080/19427867.2023.2212998
Sina Shokoohyar , Vahid Ghomi , Amirsalar Jafari Gorizi , Weimin Liang , Andrew Sinclair
{"title":"Impact of COVID-19 outbreak and vaccination on ride-sharing services: a social media analysis","authors":"Sina Shokoohyar ,&nbsp;Vahid Ghomi ,&nbsp;Amirsalar Jafari Gorizi ,&nbsp;Weimin Liang ,&nbsp;Andrew Sinclair","doi":"10.1080/19427867.2023.2212998","DOIUrl":"10.1080/19427867.2023.2212998","url":null,"abstract":"<div><p>The global COVID-19 pandemic produced several changes in nearly every aspect of our lives. Ride-sharing platforms such as Uber and Lyft must adapt their strategies and aims to stay afloat. The analysis in this study is based on 216,120 tweets in the U.S. between January 1, 2019, and December 30, 2021, about Uber. It includes four separate analyses: Popularity and Usage Analytics, Sentimental Analytics, Voice Analytics, and Topic Mining Analytics. The result shows that usage and popularity of Uber on Twitter negatively affect Covid and death cases. In contrast, vaccination helps mitigate the shock of Covid. Additionally, ’ ‘Uber’s policy and business model was beneficial in improving its positive image during the pandemic; On the early breakout of Covid in the U.S. Uber had a jump on the positive sentiment, mainly because Uber provided safer service than public transportation.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48462245","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
Discrete wavelet transform application for bike sharing system check-in/out demand prediction 离散小波变换在共享单车系统签到/签退需求预测中的应用
IF 3.3 3区 工程技术
Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-07-02 DOI: 10.1080/19427867.2023.2219045
Yu Chen , Wei Wang , Xuedong Hua , Weijie Yu , Jialiang Xiao
{"title":"Discrete wavelet transform application for bike sharing system check-in/out demand prediction","authors":"Yu Chen ,&nbsp;Wei Wang ,&nbsp;Xuedong Hua ,&nbsp;Weijie Yu ,&nbsp;Jialiang Xiao","doi":"10.1080/19427867.2023.2219045","DOIUrl":"10.1080/19427867.2023.2219045","url":null,"abstract":"<div><p>The rebalancing of bikes and demand prediction at the station level plays a fundamental role in the regular operation and maintenance of bike-sharing systems (BSSs). In this paper, a novel model which incorporates discrete wavelet transform (DWT), autoregressive integrated moving average (ARIMA), and long-short term memory neural network (LSTM NN), is proposed for BSS station-level check-in/out demand prediction. This study adopts the wavelet analysis method to denoise the raw BSS demand series firstly. Then, DWT is developed to decompose the denoised sequence into three high-frequency components (i.e. details) and one low-frequency component (i.e. approximation). ARIMA and LSTM are employed to forecast the detailed components and one approximation component, respectively. The predicted results of each model are reconstructed into the final outputs by DWT. An experiment on a real-world trip dataset showed that the proposed approach consistently outperforms the standard ARIMA model and LSTM model.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135642739","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
Car following models for alleviating the degeneration of CACC function of CAVs in weak platoon intensity 缓解弱排强度CAV CACC功能退化的跟车模型
IF 3.3 3区 工程技术
Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-07-02 DOI: 10.1080/19427867.2023.2229108
Le Xu , Jianxiao Ma , Shile Zhang , Yuchen Wang
{"title":"Car following models for alleviating the degeneration of CACC function of CAVs in weak platoon intensity","authors":"Le Xu ,&nbsp;Jianxiao Ma ,&nbsp;Shile Zhang ,&nbsp;Yuchen Wang","doi":"10.1080/19427867.2023.2229108","DOIUrl":"10.1080/19427867.2023.2229108","url":null,"abstract":"<div><p>To alleviate the performance degeneration of the cooperative adaptive cruising control (CACC) of connected and automated vehicles (CAVs) with low market penetration rates (MPRs), it is necessary to resolve the performance degeneration of CAVs operating at weak mixed-platoon intensities for any-MPR CAVs. A car following model (PMCC) for CAVs is proposed, accounting for human reaction time, communication delay, traffic information memory, and vehicle-to-vehicle (V2V) communication. Linear stability analysis was conducted to validate the stability of mixed platoons at weak platoon intensities for different CAV following models. Numerical simulations were conducted to simulate weak-intensity mixed platoons for different CAV following models operating at high and low equilibrium velocities. The results suggest that PMCC exhibits wider stability equilibrium intervals under different theoretical time headway scenariosand performs well at dissipating the speed fluctuation propagation and minimizing the speed fluctuation amplitude.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47896483","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
Vehicle-following behaviour in mixed traffic – role of lane position and adjacent vehicle 混合交通中的车辆跟驰行为——车道位置和相邻车辆的作用
IF 3.3 3区 工程技术
Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-07-02 DOI: 10.1080/19427867.2023.2205723
Kavitha Madhu , Karthik K. Srinivasan , R. Sivanandan
{"title":"Vehicle-following behaviour in mixed traffic – role of lane position and adjacent vehicle","authors":"Kavitha Madhu ,&nbsp;Karthik K. Srinivasan ,&nbsp;R. Sivanandan","doi":"10.1080/19427867.2023.2205723","DOIUrl":"10.1080/19427867.2023.2205723","url":null,"abstract":"<div><p>In mixed traffic condition, varying vehicle dimensions and lack of lane discipline lead to parallel movement of vehicles in the same lane or between lanes. This results in a condition where the longitudinal response of vehicles gets affected by adjacent vehicles and their configurations. Correspondingly, the adjacent vehicle configurations are significantly influenced by the lane position of subject vehicle. To accommodate this scenario, the study formulates longitudinal acceleration models from trajectory data considering the influence of subject vehicle’s lane position along with adjacent vehicle characteristics. The response under different cases of subject vehicle’s lane position and adjacent vehicle configurations are evaluated. The statistical analysis indicates that the following behavior varies based on lane position of subject vehicle and adjacent vehicle attributes. It is also found that disregarding these attributes can produce significantly erroneous acceleration estimates. These features can improve existing following behavior models and can enhance the realism of the microscopic modeling scheme for mixed traffic conditions.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46455227","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
Traffic signal control model for the intersection with a work zone 带工作区的交叉口交通信号控制模型
IF 2.8 3区 工程技术
Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-04-20 DOI: 10.1080/19427867.2023.2197702
Da Yang , Yuting Chen , Tingwei Feng , Bin Zheng , Gang Su
{"title":"Traffic signal control model for the intersection with a work zone","authors":"Da Yang ,&nbsp;Yuting Chen ,&nbsp;Tingwei Feng ,&nbsp;Bin Zheng ,&nbsp;Gang Su","doi":"10.1080/19427867.2023.2197702","DOIUrl":"10.1080/19427867.2023.2197702","url":null,"abstract":"<div><p>When a work zone is located at an intersection, it greatly reduces the capacity and change the traffic flow characteristics. However, the impacts of work zones have not attracted much attention, and the signal control method of the intersection with a work zone has not been investigated yet. This paper focuses on a specific type of work zone, which is located within the area of an intersection. The saturation flow rate model, traffic wave model, traffic delay model, and emptying time model are proposed to capture the traffic flow characteristics of the intersection with an island work zone, and a signal control model is further put forward. The real data is collected to calibrate, validate, and evaluate the proposed models. The results indicate that the proposed signal control model can reduce about 15.6% of queue length and 17.2% of traffic delay for the intersection with an island work zone.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41745737","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
Estimation of VMT using heteroskedastic log-linear regression models 用异方差对数-线性回归模型估计VMT
IF 2.8 3区 工程技术
Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-04-20 DOI: 10.1080/19427867.2023.2189802
Asif Mahmud , Ian Hamilton , Vikash V. Gayah , Richard J. Porter
{"title":"Estimation of VMT using heteroskedastic log-linear regression models","authors":"Asif Mahmud ,&nbsp;Ian Hamilton ,&nbsp;Vikash V. Gayah ,&nbsp;Richard J. Porter","doi":"10.1080/19427867.2023.2189802","DOIUrl":"10.1080/19427867.2023.2189802","url":null,"abstract":"<div><p>Vehicle miles traveled (VMT) is an essential input for many aspects of transportation engineering, and an accurate estimation of VMT is critical for practicing engineers. Linear regression models are a popular method to estimate VMT as they provide insight into the relationships between VMT and other external factors. In linear regression models the prediction of the response variable has a non-zero probability of resulting in a negative value. For this reason, the natural logarithm of VMT is often used as the response variable to force a positive outcome. However, these log-linear regression (LLR) models provide median VMT estimate instead of the mean estimate. To overcome this limitation of LLR models, this study proposes using heteroskedastic LLR and count data methods to estimate VMT. These methods are found to have better performance than LLR models in terms of data fit and prediction accuracy.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43409926","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
On the Relocation Behavior of Ride-sourcing Drivers 论网约车司机的搬迁行为
IF 2.8 3区 工程技术
Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-04-20 DOI: 10.1080/19427867.2023.2192581
Peyman Ashkrof , Gonçalo Homem de Almeida Correia, Oded Cats, Bart van Arem
{"title":"On the Relocation Behavior of Ride-sourcing Drivers","authors":"Peyman Ashkrof ,&nbsp;Gonçalo Homem de Almeida Correia,&nbsp;Oded Cats,&nbsp;Bart van Arem","doi":"10.1080/19427867.2023.2192581","DOIUrl":"10.1080/19427867.2023.2192581","url":null,"abstract":"<div><p>Ride-sourcing drivers, as individual service suppliers, can freely adopt their own relocation strategies, including waiting, cruising freely, or following the platform recommendations. These decisions substantially impact the balance between supply and demand, and consequently affect system performance. We conducted a stated choice experiment to study the searching behaviour of ride-sourcing drivers and examine novel policies. A unique dataset of 576 ride-sourcing drivers working in the US was collected and a choice modelling approach was used to estimate the effects of multiple existing and hypothetical attributes. The results suggest that ride-sourcing drivers’ relocation strategies vary considerably between different drivers groups. Surge pricing significantly stimulates drivers to head toward the designated areas. However, the distance between the driver’s location and surge or high-demand areas demotivates them from following the platform repositioning recommendations. We discuss the implications of our findings for various platform policies on real-time information sharing and platform repositioning guidance.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43188022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Route optimization of vacant taxicab considering sequential dependence in abstract grid network based on quadtree 基于四叉树的抽象网格中考虑时序依赖的出租车空闲路径优化
IF 2.8 3区 工程技术
Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-04-20 DOI: 10.1080/19427867.2023.2193443
Chenhao Zhang , Lin Cheng , Yibei Zhang , Mingyang Du , Wen Zheng
{"title":"Route optimization of vacant taxicab considering sequential dependence in abstract grid network based on quadtree","authors":"Chenhao Zhang ,&nbsp;Lin Cheng ,&nbsp;Yibei Zhang ,&nbsp;Mingyang Du ,&nbsp;Wen Zheng","doi":"10.1080/19427867.2023.2193443","DOIUrl":"10.1080/19427867.2023.2193443","url":null,"abstract":"<div><p>In this paper, we propose a method of route optimization of vacant taxicab based on the abstract grid network. Firstly, an abstract grid network is built by the quadtree technology with the vacant trajectory data embedded. Secondly, the Markov decision process framework considering the sequential dependence is used to model the problem. Finally, we solve this problem by the policy iteration and compare the method by taking the GPS trajectory data in different hours of 797 taxicabs in a typical working day in Shenzhen, comparing that with the optimal strategy without considering sequential dependence, MNP, local hotspot and random walk algorithm by simulation, respectively. The results show that: The use of quadtree can reduce the sparseness of matching probability from 80.46% to 30.18%. The average revenue per unit distance has increased by 6.10%, 8.75%, 33.24% and 60.06%. The vacant driving rate has decreased by 5.33%, 6.15%, 18.86%, and 23.18%.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45307625","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
A dynamic network data envelopment analysis cross-efficiency evaluation on the benefits of bus transit services in 33 Chinese cities 中国33个城市公交服务效益的动态网络数据包络分析交叉效率评价
IF 2.8 3区 工程技术
Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-04-20 DOI: 10.1080/19427867.2023.2198109
Meng Liu , Chunqin Zhang , Wenbin Huang , Mengmeng Wang , Guangnian Xiao
{"title":"A dynamic network data envelopment analysis cross-efficiency evaluation on the benefits of bus transit services in 33 Chinese cities","authors":"Meng Liu ,&nbsp;Chunqin Zhang ,&nbsp;Wenbin Huang ,&nbsp;Mengmeng Wang ,&nbsp;Guangnian Xiao","doi":"10.1080/19427867.2023.2198109","DOIUrl":"10.1080/19427867.2023.2198109","url":null,"abstract":"<div><p>Our objective in this paper is to evaluate the benefits of bus transit. To obtain the more accurate and highly discrimination results, this study establishes an evaluation indicator system from a stakeholder perspective and proposes a novel combined method consisting of dynamic network data envelopment analysis, cross-efficiency evaluation, and Shannon entropy aggregation method. An empirical study of bus transit systems in 33 key Chinese cities from 2016 to 2019 is provided. The results show that the benefit of bus transit in most key cities was ineffective. In contrast to production efficiency, focusing on improving service effectiveness is more conducive to improving the benefits of bus transit. Small cities have higher benefits than large cities. Meanwhile, the benefits of bus transit vary geographically. This evaluation outcome provides a more appropriate basis for decision-making related to the benefits of public transit services, as well as for operational and management studies.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47296102","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
Modified social force model for pedestrian–vehicle interactions at a signalized intersection 信号交叉口人车交互的改进社会力模型
IF 2.8 3区 工程技术
Transportation Letters-The International Journal of Transportation Research Pub Date : 2024-04-20 DOI: 10.1080/19427867.2023.2188662
Ankriti Shrivas , Abhinav Kumar
{"title":"Modified social force model for pedestrian–vehicle interactions at a signalized intersection","authors":"Ankriti Shrivas ,&nbsp;Abhinav Kumar","doi":"10.1080/19427867.2023.2188662","DOIUrl":"10.1080/19427867.2023.2188662","url":null,"abstract":"<div><p>Several researchers have modified the original Social Force Model (SFM) for pedestrians by including vehicles and simulating interaction behaviors in shared space layouts. The present study is conducted at a signalized intersection where the performance and functionality are defined by spontaneous order. The SFM was modified, and two-wheelers were added along with cars and pedestrians to analyze their interactions. The Hybrid Calibration Method was adopted to calibrate the interaction parameters utilizing an optimization technique and real-time data from the study site. It can be concluded from the parameter values that the strength of interaction reduced as the range between the road agents increased. The findings can aid urban planners in visualizing the interaction behavior of pedestrians, cars, and two-wheelers. Moreover, the feasibility of introducing the shared space concept in India as an alternative to the conventional traffic planning system can also be determined during the designing phase.</p></div>","PeriodicalId":48974,"journal":{"name":"Transportation Letters-The International Journal of Transportation Research","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46502429","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
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