Preparations For Field Testing Of Combined Variable Speed Advisory Vsa And Coordinated Ramp Metering Crm For Freeway Traffic Control
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Preparations For Field Testing Of Combined Variable Speed Advisory Vsa And Coordinated Ramp Metering Crm For Freeway Traffic Control
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Author : Xiao-Yun Lu
language : en
Publisher:
Release Date : 2014
Preparations For Field Testing Of Combined Variable Speed Advisory Vsa And Coordinated Ramp Metering Crm For Freeway Traffic Control written by Xiao-Yun Lu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Electronic traffic controls categories.
Preparations For Field Testing Of Combined Variable Speed Advisory Vsa And Coordinated Ramp Metering Crm For Freeway Traffic Control Phase I
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Author : Xiao-Yun Lu
language : en
Publisher:
Release Date : 2014
Preparations For Field Testing Of Combined Variable Speed Advisory Vsa And Coordinated Ramp Metering Crm For Freeway Traffic Control Phase I written by Xiao-Yun Lu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Electronic traffic controls categories.
Coordination Of Freeway Ramp Meters And Arterial Traffic Signals Field Operational Test Fot
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Author : Xiao-Yun Lu
language : en
Publisher:
Release Date : 2013
Coordination Of Freeway Ramp Meters And Arterial Traffic Signals Field Operational Test Fot written by Xiao-Yun Lu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Electronic traffic controls categories.
Design Field Implementation And Evaluation Of Adaptive Ramp Metering Algorithms
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Author : Dengfeng Sun
language : en
Publisher:
Release Date : 2005
Design Field Implementation And Evaluation Of Adaptive Ramp Metering Algorithms written by Dengfeng Sun and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Algorithms categories.
The main objectives of Task Order 4136 are (1) the design of improved freeway on-ramp metering strategies that make use of recent developments in traffic data collection, traffic simulation, and control theory, and (2) the testing of these methods on a 14-mile segment of Interstate 210 Westbound in southern California. To date, the major accomplishments of this project include (i) the development of a complete procedure for constructing and calibrating a microscopic freeway traffic model using the Vissim microsimulator, which was applied successfully to the full I-210 test site, (ii) a simulation study, using the calibrated Vissim I-210 model, comparing the fixed-rate, Percent Occupancy, and Alinea local ramp metering schemes, which showed that Alinea can improve freeway conditions when mainline occupancies are measured upstream of the on-ramp (as on I-210 and most California freeways), as well as when occupancy sensors are downstream of the on-ramp, (iii) development of computationally efficient macroscopic freeway traffic models, the Modified Cell Transmission Model (MCTM) and Switching-Mode Model (SMM), validation of these models on a 2-mile segment of I-210, and determination of observability and controllability properties of the SMM modes, (iv) design of a semi-automated method for calibrating the parameters of the MCTM and SMM, which, when applied to an MCTM representation of the full I-210 segment, was able to reproduce the approximate behavior of traffic congestion, yielding about 2% average error in the predicted Total Travel Time (TTT), and (v) development of a new technique for generating optimal coordinated ramp metering plans, which minimizes a TTT-like objective function. Simulation results for a macroscopic model of the 14-mile I-210 segment have shown that the optimal plan predicts an 8.4% savings in TTT, with queue constraints, over the 5-hour peak period.
Field Implementation Testing And Refinement Of Density Based Coordinated Ramp Control Strategy
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Author :
language : en
Publisher:
Release Date : 2015
Field Implementation Testing And Refinement Of Density Based Coordinated Ramp Control Strategy written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Electronic traffic controls categories.
In the Twin Cities metropolitan area, freeway ramp metering goes back as early as 1969, when the Minnesota Department of Transportation (MnDOT) first tested ramp metering in an I-35E pilot project. To date, the Twin Cities ramp metering system has grown to include more than 433 ramp meters. Research on better, improved ramp control strategies has continued over the years and MnDOT has implemented minor and major changes in the control logic. Two independent studies both aimed at developing the next generation in ramp metering by focusing on density. Based on these efforts, two new algorithms were developed: the UMN Density and the UMD KAdaptive, named based on the campus at which they were developed. The goal of this project was to implement both algorithms and test them under real conditions. Priorities and technical problems prevented the evaluation of the UMN algorithms, so this report focuses on the evaluation of the UMD KAdaptive algorithm on two freeway corridors in the Twin Cities, MN. The first site, a section of TH-100 northbound between 50th Street and I-394, was selected to compare the then current logic, the Stratified Zone algorithm, with the new one. During the course of this project, the UMD algorithm eventually replaced the Stratified Zone algorithm and was implemented in the entire system. This full deployment also included corridors that were not controlled before. The second evaluation site on eastbound TH-212 was a site that allowed for a with/without control evaluation of the UMD algorithm. This report describes the experiments conducted at both sites and includes a comprehensive review of the state of ramp metering strategies around the world to date.
Field Experiment Of Variable Speed Advisory Vsa
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Author : Xiao-Yun Lu
language : en
Publisher:
Release Date : 2018
Field Experiment Of Variable Speed Advisory Vsa written by Xiao-Yun Lu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Electronic traffic controls categories.
Exploring The Potential Of Combining Ramp Metering And Variable Speed Limit Strategies For Alleviating Real Time Crash Risk On Urban Freeways
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Author : Kirolos Maged Haleem
language : en
Publisher:
Release Date : 2007
Exploring The Potential Of Combining Ramp Metering And Variable Speed Limit Strategies For Alleviating Real Time Crash Risk On Urban Freeways written by Kirolos Maged Haleem and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
In summary, Ramp Metering was more beneficial at congested situations, while Variable Speed Limits were more beneficial at free-flow conditions. At conditions approaching congestion, the combination of Ramp Metering and Variable Speed Limits produced the best benefits. These results illustrate the significant potential of ITS strategies to improve the safety and efficiency of urban freeways.
Field Test Of Coordinated Ramp Metering
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Author : Xiao-Yun Lu
language : en
Publisher:
Release Date : 2017
Field Test Of Coordinated Ramp Metering written by Xiao-Yun Lu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Ramp metering (Traffic engineering) categories.
Rhodes Itms Milos
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Author : Frank W. Ciarallo
language : en
Publisher:
Release Date : 2002
Rhodes Itms Milos written by Frank W. Ciarallo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Adaptive control systems categories.
The RHODES-Integrated Traffic Management System Program addresses the design and development of a real-time traffic adaptive control system for an integrated system of freeways and arterial roads. The goals of this project were to test coordinated, adaptive ramp metering using the Multi-Objective, Integrated, Large-Scale, and Optimized System (MILOS) software on a major urban freeway. A 7-mile eastbound segment of I-10 in Phoenix, just west of the I-10/I-17 Interchange, was chosen as the study area because of the availability of data, and because of recurring congestion.
Feedback Ramp Metering In Intelligent Transportation Systems
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Author : Pushkin Kachroo
language : en
Publisher: Springer Science & Business Media
Release Date : 2003
Feedback Ramp Metering In Intelligent Transportation Systems written by Pushkin Kachroo and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Technology & Engineering categories.
Feedback Ramp Metering in Intelligent Transportation Systems is the first book on the topic of using feedback control (also called real-time traffic control or adaptive control by some traffic engineers) in ramp metering. It provides traffic theory fundamentals and then the design of feedback controllers for isolated and coordinated ramp metering problems. Software simulation code in Matlab and Paramics is provided in the book so that the reader can get a hands-on feel for the various algorithms. With a large number of examples, illustrations, and original problems, this book is excellent as a textbook or reference book for a senior or graduate level course on the subject, as well as a reference for researchers in related fields.