Transportation Research Record: Journal of the Transportation Research Board最新文献_第5页

Passenger Time Use Comparison Between Traditional and Autonomous Vehicles: A Latent Class and Transition Analysis 传统车辆与自动驾驶车辆的乘客时间使用比较：潜类和过渡分析

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-08-07 DOI: 10.1177/03611981241263824

Nadim Hamad, Divyakant Tahlyan, Hoseb Abkarian, Hani Mahmassani

{"title":"Passenger Time Use Comparison Between Traditional and Autonomous Vehicles: A Latent Class and Transition Analysis","authors":"Nadim Hamad, Divyakant Tahlyan, Hoseb Abkarian, Hani Mahmassani","doi":"10.1177/03611981241263824","DOIUrl":"https://doi.org/10.1177/03611981241263824","url":null,"abstract":"As the era of autonomous vehicles (AVs) approaches, understanding how passengers’ time use during a trip may change from a traditional vehicle (non-AV) to an AV is important to the adoption and use of AVs. In this study, a latent class analysis (LCA) as well as a latent transition analysis (LTA) are adopted to investigate the choice of travel activities of individuals as passengers in a traditional vehicle, such as a car or transit, and the anticipated shift in these activities in an AV. Since individuals may perform different activities during different trip purposes, activity choices and non-AV to AV transition dynamics are explored from two different perspectives: commute trips (e.g., to work or school) and non-commute trips (e.g., leisure, errands, or medical). Findings from the LCA models show three distinct groups of individuals with varying activity preferences in a traditional vehicle and four distinct groups that could emerge in an AV. AV users exhibited a higher preference for activities such as texting/browsing social media, relaxing, and working, suggesting that AVs may offer passengers a more productive use of their travel time. Furthermore, the LTA model shows that there is a good portion of individuals who were performing one or two activities in a traditional vehicle now becoming variety seekers that could perform at least four different activities in an AV, further corroborating the findings that AVs could provide a more productive and efficient use of travel time.","PeriodicalId":517391,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933688","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: 0

Parametric Study on Transversely Cracked Precast Prestressed Concrete Bridge Deck Girders with Rectangular Voids 带矩形空隙的横向开裂预制预应力混凝土桥面梁参数研究

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-08-07 DOI: 10.1177/03611981241265847

Dachina Gunasekaran, Bassem Andrawes

{"title":"Parametric Study on Transversely Cracked Precast Prestressed Concrete Bridge Deck Girders with Rectangular Voids","authors":"Dachina Gunasekaran, Bassem Andrawes","doi":"10.1177/03611981241265847","DOIUrl":"https://doi.org/10.1177/03611981241265847","url":null,"abstract":"Transverse cracks in precast prestressed concrete (PPC) bridge deck girders cause a notable increase in strand stresses and adversely affect the cracked girder’s capacity and durability. This numerical study analyzes the impact of transverse cracks on the behavior of PPC bridge deck girders by relating the crack width to the residual capacity, stresses, and load rating of the cracked girders. A non-linear finite element (FE) model is developed to understand the behavior and predict the stresses in an in-service PPC bridge deck girder damaged by a transverse crack. The residual capacity and built-up stresses obtained from the FE model are used in the load rating analysis of the cracked PPC bridge deck girder. A parametric study is conducted to understand the effect of the influencing parameters, such as the girder geometry and material properties, on the damaged girder’s behavior. For an 838 mm × 914 mm PPC deck girder, the statistically significant parameters are found to be the span length ( L), strand diameter ( db), and skew angle ([Formula: see text]). From the numerical analysis of the in-service PPC bridge deck girder, the load rating is predicted to be governed by the capacity for the existing 0.25 mm crack. In the parametric study of the 838 mm × 914 mm PPC deck girder, the inventory rating factor of the prestressing strands in tension is predicted to decrease linearly for crack width up to 0.64 mm, while the capacity inventory rating factor is predicted to decrease by up to 73.8% for the crack width of 0.64 mm.","PeriodicalId":517391,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933686","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: 0

Time Matters: Analyzing the Impact of Nighttime on Commuter Trip Chaining Behavior and Travel Time Use in Karlsruhe, Germany 时间很重要：分析夜间对德国卡尔斯鲁厄通勤出行连锁行为和旅行时间使用的影响

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-08-07 DOI: 10.1177/03611981241265843

Jonas Kapitza

{"title":"Time Matters: Analyzing the Impact of Nighttime on Commuter Trip Chaining Behavior and Travel Time Use in Karlsruhe, Germany","authors":"Jonas Kapitza","doi":"10.1177/03611981241265843","DOIUrl":"https://doi.org/10.1177/03611981241265843","url":null,"abstract":"Trip chaining and the use of travel time by commuters have long been the foci of considerable research interest. However, despite this attention, few studies have investigated the differences in behavior associated with daytime and nighttime travel. To fill this gap in the literature, the present study investigated the influence of time of day on trip chaining and travel time use. The analysis was based on a data set of residents of the Karlsruhe area who regularly commute both during the day and at night. The data set was analyzed both descriptively and through the application of a series of logistic regression models. The results indicated that nighttime had a significant influence on the formation of trip chains and the use of time during the commute. For example, both the number of trip chains formed and the number of activities performed during the commute are reduced at night. The reasons for forming trip chains also varied according to the time of day. Whereas most trip chains were formed for errands during the day, at night, the majority were formed to pursue leisure activities. In addition, activities such as working, telephoning, looking at the landscape, or reading were significantly reduced at night. The findings of this study contribute to a more in-depth understanding of commuter behavior, on the basis of which, innovative and efficient mobility strategies can be further developed.","PeriodicalId":517391,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933685","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: 0

Perimeter Control-Based Coordinated Ramp Metering with Linked Queue Management for Freeway Networks 基于周边控制的协调匝道计量与高速公路网络的关联队列管理

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-08-07 DOI: 10.1177/03611981241262313

Ziang He, Yu Han, Weihong Guo, Yanjie Ji, Pan Liu

{"title":"Perimeter Control-Based Coordinated Ramp Metering with Linked Queue Management for Freeway Networks","authors":"Ziang He, Yu Han, Weihong Guo, Yanjie Ji, Pan Liu","doi":"10.1177/03611981241262313","DOIUrl":"https://doi.org/10.1177/03611981241262313","url":null,"abstract":"This paper proposes a macroscopic fundamental diagram (MFD)-based perimeter control approach for coordinated ramp metering, aiming to minimize the total time spent (TTS) of a freeway network (stretch) with multiple bottlenecks. To address problems incurred from limited queue storage space and minimum green time at on-ramps, the proposed method extends previous approaches in two aspects. Firstly, a coordinated ramp control approach is proposed to ensure that the total metered on-ramp flow remains below the value determined by the MFD-based perimeter regulator, thereby preventing network over-saturation. Secondly, a novel queue management approach is developed to prevent on-ramp queue saturation and its associated side effects, for example, spillback or insufficient control actions. This approach determines the quasi-optimal flow of the next upstream (slave) on-ramp, based on the predicted queue of each (master) on-ramp suffering from excessive queues. The proposed perimeter controller was tested using SUMO, a microscopic simulator, on a realistic freeway network, and compared with other existing strategies, including HERO and perimeter controllers with other metered on-ramp flow distribution approaches. The simulation results suggest that the proposed strategy can ( i) effectively mitigate congestion and maintain capacity within the freeway network, resulting in reduced overall TTS, and ( ii) appropriately delay or prevent queue saturation at on-ramps.","PeriodicalId":517391,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933691","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: 0

Sustainable Pervious Concrete with Silica Fume as Cement Replacement: A Review 用硅灰替代水泥的可持续透水混凝土：综述

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-08-07 DOI: 10.1177/03611981241265852

Navaratnarajah Sathiparan, Daniel Niruban Subramaniam

{"title":"Sustainable Pervious Concrete with Silica Fume as Cement Replacement: A Review","authors":"Navaratnarajah Sathiparan, Daniel Niruban Subramaniam","doi":"10.1177/03611981241265852","DOIUrl":"https://doi.org/10.1177/03611981241265852","url":null,"abstract":"Pervious concrete is a unique type of concrete with high porosity that allows water to pass through. This characteristic makes it beneficial for various applications, such as stormwater management, groundwater recharge, and reduced heat island effect. However, pervious concrete typically requires more cement than conventional concrete because of its mix design. This increased cement content can be partially replaced with supplementary cementitious materials, such as silica fume. This review article investigates the influence of silica fume on the properties of pervious concrete, including the mechanical properties (compressive strength, splitting tensile strength, and flexural strength), durability (resistance to freeze–thaw cycles and abrasion), and environmental aspects. The article highlights that silica fume can improve the mechanical properties and durability of pervious concrete up to an optimal replacement level. The optimum replacement level of cement with silica fume was found to be 10%–15%. Beyond this level, the performance of pervious concrete decreases. The pervious concrete containing silica fume showed superior abrasion resistance and improved freeze–thaw resistance compared to conventional pervious concrete. In addition, incorporating silica fume in pervious concrete reduces cement usage, leading to a lower environmental impact and more sustainable construction practices. The article also analyzes the limitations of using silica fume, such as the potential for reduced workability because of its fine particle size. Overall, the review suggests that silica fume is a promising supplementary cementitious material for enhancing the performance and sustainability of pervious concrete.","PeriodicalId":517391,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933687","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: 0

Can Geopolymer Be a Replacement for Portland Cement in Full-Depth Reclamation Projects? Short- and Long-Term Performance Analysis 土工聚合物能否在全深度填海项目中替代硅酸盐水泥？短期和长期性能分析

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-08-06 DOI: 10.1177/03611981241265848

Abhitesh Sachdeva, G.D. Ransinchung R.N, Praveen Kumar, Meraj Alam Khan

{"title":"Can Geopolymer Be a Replacement for Portland Cement in Full-Depth Reclamation Projects? Short- and Long-Term Performance Analysis","authors":"Abhitesh Sachdeva, G.D. Ransinchung R.N, Praveen Kumar, Meraj Alam Khan","doi":"10.1177/03611981241265848","DOIUrl":"https://doi.org/10.1177/03611981241265848","url":null,"abstract":"The fundamental concern of the full-depth reclamation (FDR) technique using Portland cement (FDR-PC) lies in its detrimental effect on the environment. Therefore, researchers are exploring alternative binders that are comparatively greener but compatible with FDR. This study evaluates both the strength and durability aspects of FDR incorporating geopolymer binder (FDR-GP) as an alternative to conventional FDR-PC. Various blends of fly ash (FA) and ground granulated blast furnace slag (GGBS) have been experimented with as geopolymer pre-cursors, ensuring that the additive content does not exceed 20% by weight of the total mix. Sodium hydroxide (NaOH) was utilized for the alkalinization in varying molarities to enhance the performance of the mixes. The experimental design was formulated to achieve a target 7-day unconfined compressive strength (UCS) strength of 4.95 MPa. This was obtained at a lower molarity (M) of 2 M and a 70% FA, 30% GGBS binder content. The mixes performed satisfactorily in both compression and flexure, along with excellent durability properties analyzed through wetting and drying tests. Furthermore, the long-term performance of FDR-GP mixes was investigated with regard to both UCS and flexural strength after 56, 161, and 238 days of curing. Thereafter, a comprehensive microstructural analysis was conducted to understand the fundamental changes in the matrix that influence mix performance. The outcome of this research confirms the potential of using FA/GGBS-based geopolymer as an alternative binder in FDR projects of flexible pavement, the mechanical and durability properties of which adequately satisfy the requirements as stipulated in various design standards.","PeriodicalId":517391,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141968786","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: 0

Research on Joint Distribution Path Planning of Electric Logistics Vehicles with Different Recharge Modes 不同充电模式的电动物流车联合配送路径规划研究

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-08-06 DOI: 10.1177/03611981241265842

Jing Wang, Tingting Gao, Jingzhe Zhang, Chuang Tu

{"title":"Research on Joint Distribution Path Planning of Electric Logistics Vehicles with Different Recharge Modes","authors":"Jing Wang, Tingting Gao, Jingzhe Zhang, Chuang Tu","doi":"10.1177/03611981241265842","DOIUrl":"https://doi.org/10.1177/03611981241265842","url":null,"abstract":"To address the route planning issues under the community group purchase model for joint delivery, this study thoroughly considers electric logistics vehicles with different recharging methods. The objective is to minimize the sum of operating costs, recharging costs, time window penalty costs, and carbon emission costs. Separate multi-objective optimization models for route planning are constructed for both charging and battery-swapping logistics vehicles. An improved seagull optimization algorithm, guided by the golden sine strategy of the Lévy flight guidance mechanism, is employed to avoid local optima and enhance the solution efficiency. The feasibility of the models and the algorithm is verified through simulation examples. Experimental results show that, at the current stage, battery-swapping logistics vehicles display significant advantages over charging electric logistics vehicles. Although battery-swapping logistics vehicles extend delivery time, they can reduce the total delivery costs to a certain extent. Therefore, the future development prospects of battery-swapping logistics vehicles will be even broader.","PeriodicalId":517391,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933633","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: 0

Real-Time Estimation of Origin–Destination Matrices Using a Deep Neural Network for Digital Twins 使用深度神经网络实时估算数字双胞胎的原点-目的地矩阵

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-08-06 DOI: 10.1177/03611981241266837

Donggyu Min, Hyunsoo Yun, Seung Woo Ham, Dong-Kyu Kim

{"title":"Real-Time Estimation of Origin–Destination Matrices Using a Deep Neural Network for Digital Twins","authors":"Donggyu Min, Hyunsoo Yun, Seung Woo Ham, Dong-Kyu Kim","doi":"10.1177/03611981241266837","DOIUrl":"https://doi.org/10.1177/03611981241266837","url":null,"abstract":"The digital twin, a real-time replica of physical systems, has garnered attention as a promising tool to strategize and evaluate solutions for complex real-world issues. However, developing digital twins in the field of transportation faces significant challenges related to the real-time estimation of dynamic origin–destination (OD) matrices constrained by computation time. To bridge this gap, microscopic traffic simulations with real-time synchronization are being researched. Nonetheless, the computational issue persists, emphasizing the need for more efficient OD estimation methods. In this regard, our objective is to reduce computation time in simulation-based methods by developing a data-driven metamodel using a deep neural network. The proposed model serves to map the correlation between the OD matrix and detector data. This model simplifies the computational process using hidden layers, rather than calculating complex interactions between vehicles in the traffic simulation. Compared to conventional methods, we evaluate the capability to estimate a reasonable OD matrix within a restricted time and validate our approach using detector data from Daejeon City, South Korea. The findings indicate that by combining our data-driven metamodel with the simultaneous perturbation stochastic approximation, it becomes feasible to estimate a reasonable OD matrix within a stipulated time frame, compared to the conventional method. Given a 1-min time frame, the proposed method outperforms the conventional simulation-based method by improving the calibration performance of traffic flow by 44.5 percentage points. This paper proposes a practical and versatile approach for real-time OD estimation, laying the foundation for extending microscopic traffic simulation into the digital twin.","PeriodicalId":517391,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933690","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: 0

Nonlinear Interpretation of Resilient Modulus Parameters Considering Incremental Static and Dynamic Loading 考虑增量静态和动态载荷的弹性模量参数的非线性解释

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-08-06 DOI: 10.1177/03611981241257508

Adrian Ricardo Archilla, Phillip S.K. Ooi, Saroj Pathak

{"title":"Nonlinear Interpretation of Resilient Modulus Parameters Considering Incremental Static and Dynamic Loading","authors":"Adrian Ricardo Archilla, Phillip S.K. Ooi, Saroj Pathak","doi":"10.1177/03611981241257508","DOIUrl":"https://doi.org/10.1177/03611981241257508","url":null,"abstract":"The resilient modulus ( Mr) is typically interpreted as the average of the last five secant slopes of the cyclic stress-axial resilient strain curve from repeated loading triaxial tests. It is not uncommon to then fit mathematical models to the secant Mr to derive model parameters ( Ki, more commonly known as K1, K2, and K3) that are then used in pavement analysis. Some engineers also backcalculate Ki from a falling weight deflectometer test. Many researchers use an incremental loading procedure to analyze pavements. When doing so, it is important to consider the nonlinear load-deformation behavior, which is considered only coarsely in the secant slope approach. Some incremental loading procedures assume the geomaterial to be nonlinear elastic while a dynamic finite element analysis typically assumes the geomaterials to be nonlinear and viscoelastic, that is, having springs and dashpots. With the latter, additional damping parameters to represent the viscoelastic effects are required. This paper compares Ki parameters estimated using linear regression on a log transformation of the Mechanistic–Empirical Pavement Design Guide (MEPDG) Mr model, which is a non-viscoelastic secant Mr approach, with those obtained using nonlinear regression of the time dependent deformations when interpreting the Mr test using incremental loading of a: 1) nonlinear elastic geomaterial; and 2) nonlinear viscoelastic geomaterial with inertial mass. The results show that the estimated Ki parameters governing the geomaterial nonlinearity are substantially affected by the estimation method and that the second alternative approach can model hysteresis well.","PeriodicalId":517391,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933644","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: 0

Railway Signal Digitalization with the European Rail Traffic Management System and Positive Train Control: Industry 4.0 Expectations and Reality 欧洲铁路交通管理系统和正线列车控制的铁路信号数字化：工业 4.0 的期望与现实

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-08-06 DOI: 10.1177/03611981241265841

Steven S. Harrod

引用次数: 0