Author: Vishnu Sharma KesarajuPublisher:
ISBN:
Category : Adaptive control systems
Languages : en
Pages : 206
Book Description
A Micro-simulation Test of Two-level Optimization-based Ramp Metering Controls
Author: Vishnu Sharma KesarajuPublisher:
ISBN:
Category : Adaptive control systems
Languages : en
Pages : 206
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.
Highway Research Abstracts
Author: Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 1006
Book Description
Annual Report
Author: University of Minnesota. Intelligent Transportation Systems InstitutePublisher:
ISBN:
Category : Intelligent Vehicle Highway Systems
Languages : en
Pages : 58
Book Description
Encyclopedia of Transportation
Author: Mark GarrettPublisher: SAGE Publications
ISBN: 1483389804
Category : Social Science
Languages : en
Pages : 3181
Book Description
Viewing transportation through the lens of current social, economic, and policy aspects, this four-volume reference work explores the topic of transportation across multiple disciplines within the social sciences and related areas, including geography, public policy, business, and economics. Features: Approximately 675 signed articles authored by prominent scholars are arranged in A-to-Z fashion and conclude with Further Readings and cross references. A Chronology helps readers put individual events into historical context; a Reader’s Guide organizes entries by broad topical or thematic areas; a detailed index helps users quickly locate entries of most immediate interest; and a Resource Guide provides a list of journals, books, and associations and their websites. While articles were written to avoid jargon as much as possible, a Glossary provides quick definitions of technical terms. To ensure full, well-rounded coverage of the field, the General Editor with expertise in urban planning, public policy, and the environment worked alongside a Consulting Editor with a background in Civil Engineering. The index, Reader’s Guide, and cross references combine for thorough search-and-browse capabilities in the electronic edition. Available in both print and electronic formats, Encyclopedia of Transportation is an ideal reference for libraries and those who want to explore the issues that surround transportation in the United States and around the world. Key Themes: Administration, Operations, and Evaluation Air Transportation Systems Economics of Transportation Energy, Environmental, and Health Impacts Facilities and Infrastructure Intermodal Transportation Systems International Transportation and Policy Labor Issues/Employee Relations Planning and Policy Safety and Security Social Issues in Transportation Surface Transportation Systems Technology, Design, and Engineering Transportation, Finance of Transportation Legislation Transportation Modeling Transportation Organizations and Agencies Travel Behavior and Research Water Transportation Systems
Government Reports Announcements & Index
Author: Dissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 842
Book Description
Applications of Advanced Technologies in Transportation Engineering
Author: Publisher:
ISBN:
Category : Transportation engineering
Languages : en
Pages : 716
Book Description
Advanced Practices in Travel Forecasting
Author: Rick DonnellyPublisher: Transportation Research Board
ISBN: 0309143101
Category : Political Science
Languages : en
Pages : 90
Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 406: Advanced Practices in Travel Forecasting explores the use of travel modeling and forecasting tools that could represent a significant advance over the current state of practice. The report examines five types of models: activity-based demand, dynamic network, land use, freight, and statewide.
Author: