Author: Xiaotian SunPublisher:
ISBN:
Category :
Languages : en
Pages : 314
Book Description
Optimization and Microsimulation of On-ramp Metering for Congested Freeways
Author: Gabriel Clemente GomesPublisher:
ISBN:
Category : Express highway interchanges
Languages : en
Pages : 546
Book Description
This dissertation investigates various aspect of the design and testing of on-ramp metering control systems, including optimization-based control and microscopic freeway modeling. A new technique for generating optimal metering plans is developed. As with most predictive designs, the ramp metering rates are found as the solution to a nonlinear optimization problem. In contrast to previous designs, the new approach 1) produces a globally optimal solution to the nonlinear problem, 2) requires only to solve a single linear program, and 3) allows the enforcement of hard constraints on the on-ramp queue lengths. The price that is paid for these features is that the objective function being minimized is not Total Travel Time, but rather a member of a class of "TTT-like" objective functions. A TTT-like objective function is defined as a linear combination of mainline flows with weights that, similarly to the Total Travel Time cost weights, decrease linearly in time from some initial value to zero at the final time. An example application of the technique shows that the globally optimal metering plan with respect to a TTT-like objective function also performs well in terms of Total Travel Time. A macroscopic analysis of local traffic-responsive ramp metering on a short stretch of freeway, with a single on-ramp and no offramps, is also presented. The study compares the performance of two popular local traffic-responsive ramp metering algorithms: Alinea and Percent-Occupancy, and addresses issues pertaining to parameter tuning and loop-detector placement. The second half of the dissertation describes the construction of a detailed microsimulation model of a stretch of Interstate 210 in Pasadena, CA. The VISSIM microsimulation package was used to create this model. Descriptions of the data gathering and processing procedures, bottleneck identification, network coding, and model calibration are provided. The model is used to test the performance of candidate local traffic-responsive controllers. Questions concerning the relative merits of these controllers, parameter tuning, and loop-detector placement are addressed in the context of the large-scale microscopic model.
Modeling, Estimation, and Control of Freeway Traffic
Author: Xiaotian SunModelling and Simulation of Large Scale Distributed Parameter Systems
Author: Issam Sullivan Strub-BrahimiPublisher:
ISBN:
Category :
Languages : en
Pages : 276
Book Description
Traffic Surveillance by Wireless Sensor Networks
Author: Sing Yiu CheungAn Introduction to Traffic Flow Theory
Author: Lily ElefteriadouPublisher: Springer Science & Business Media
ISBN: 1461484359
Category : Mathematics
Languages : en
Pages : 262
Book Description
This text provides a comprehensive and concise treatment of the topic of traffic flow theory and includes several topics relevant to today’s highway transportation system. It provides the fundamental principles of traffic flow theory as well as applications of those principles for evaluating specific types of facilities (freeways, intersections, etc.). Newer concepts of Intelligent transportation systems (ITS) and their potential impact on traffic flow are discussed. State-of-the-art in traffic flow research and microscopic traffic analysis and traffic simulation have significantly advanced and are also discussed in this text. Real world examples and useful problem sets complement each chapter. This textbook is meant for use in advanced undergraduate/graduate level courses in traffic flow theory with prerequisites including two semesters of calculus, statistics, and an introductory course in transportation. The text would also be of interest to transportation professionals as a refresher in traffic flow theory, or as a reference. Students and engineers of diverse backgrounds will find this text accessible and applicable to today’s traffic issues.
Preparations for Field Testing of Combined Variable Speed Advisory (VSA) and Coordinated Ramp Metering (CRM) for Freeway Traffic Control
Author: Xiao-Yun LuPublisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 278
Book Description
Traffic Analysis Toolbox
Author: Krista JeannottePublisher:
ISBN:
Category : Highway capacity
Languages : en
Pages : 112
Book Description
Macroscopic Modeling and Identificatio of Freeway Traffic Flow
Author: Laura Matiana MuñozApplications of Freeway Ramp Metering in Alabama
Author: Virginia P. SisiopikuPublisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 176
Book Description
Green Intelligent Transportation Systems
Author: Wuhong WangPublisher: Springer
ISBN: 9811035512
Category : Technology & Engineering
Languages : en
Pages : 1037
Book Description
These proceedings collect selected papers from the 7th International Conference on Green Intelligent Transportation System and Safety held in Nanjing on July 1-4, 2016. The selected works, which include state-of-the-art studies, are intended to promote the development of green mobility and intelligent transportation technology to achieve interconnectivity, resource sharing, flexibility and higher efficiency. They offer valuable insights for researchers and engineers in the fields of Transportation Technology and Traffic Engineering, Automotive and Mechanical Engineering, Industrial and System Engineering, and Electrical Engineering.