Download or read book Congestion Responsive On ramp Metering written by Michael Mauch and published by . This book was released on 2016 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Congestion responsive On ramp Metering written by Alexander Skabardonis and published by . This book was released on 2019 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ramp Metering Status in North America written by James Robinson and published by . This book was released on 1989 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimization and Microsimulation of On ramp Metering for Congested Freeways written by Gabriel Clemente Gomes and published by . This book was released on 2004 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Investigating the Feasibility of Coordinated Ramp Metering Along Freeway Corridors in Ohio written by Benjamin André Coifman and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Freeway corridors in most of Ohio's major cities exhibit recurring and non-recurring congestion. Traffic responsive metering is particularly attractive due to its ability to dynamically respond to the inevitable fluctuations in traffic. ODOT has ramp meters in operation on two urban freeway corridors in the state. However, performance of these meters in the field and their efficacy at managing congestion was unknown at the start of this study. This research pursued several objectives: (1) assessing the performance of the current system, (2) ensuring good performance from a traffic responsive metering system, (3) investigating the operation of the coordinated ramp metering system, and (4) work with ODOT to improve the performance of the ramp metering system.
Download or read book Adaptive Fuzzy Systems for Traffic Responsive and Coordinated Ramp Metering written by Klaus Bogenberger and published by . This book was released on 2001 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Freeway System Ramp Metering Strategies for Texas written by Carroll J. Messer and published by . This book was released on 1993 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Freeway ramp metering systems have been used to improve urban freeway flow. However, control strategies must be properly adjusted to account for ramp queues overflowing onto surface streets and provide equitable on-ramp control during various operating periods. An improved solution can be obtained by optimizing this problem simultaneously for a group of time slices. This study identifies and examines a microcomputer-based optimization scheme that can assist in developing efficient freeway control strategies for on-line freeway surveillance and control. A multi-level freeway control structure is employed for which ramp metering control algorithms are developed for each level of control. Flow-based and lane occupancy-based system algorithms are presented. Detailed data file requirements are provided for each control level. A microcomputer prototype, or laboratory test version of the system level, will be described in a companion project report.
Download or read book Study of Freeway Merge Bottlenecks and Development of New Local Traffic Responsive Ramp Metering Strategy written by Heung-Un Oh and published by . This book was released on 2000 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feedback Ramp Metering in Intelligent Transportation Systems written by Pushkin Kachroo and published by Springer Science & Business Media. This book was released on 2011-06-27 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Design Guide for Addressing Nonrecurrent Congestion written by Ingrid B. Potts, Douglas W. Harwood, Jessica M. Hutton, Chris A. Fees, Karin M. Bauer, Lindsay M. Lucas, Christopher Kinzel, Robert J. Frazier, Transportation Research Board and published by Transportation Research Board. This book was released on with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report from the second Strategic Highway Research Program (SHRP 2), which is administered by the Transportation Research Board of the National Academies, catalogs highway design treatments that can be used to reduce nonrecurrent congestion and improve the reliability of urban and rural freeways.
Download or read book Evaluation of Ramp Meter Effectiveness for Wisconsin Freeways written by and published by . This book was released on 2004 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Ramp Metering Method for Incident Condition Using Shock Wave Theory written by and published by . This book was released on 2016 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ramp meters are traffic signals at the end of freeway on-ramps that regulate the flow of traffic onto the mainline. The primary purpose of ramp meters is to prevent the freeway from becoming over-congested, and to maximize the efficient use of freeway capacity. While the original ramp metering controllers used pre-timed ramp meters, the majority of modern ramp metering algorithms are traffic responsive. Although many studies have been conducted in recent years, most of them focus on bottleneck congestion. Since incidents account for approximately 25% of highway congestion, a study on ramp metering algorithms for incident conditions is necessary. Given the fact of using historical data and their recursive logic, most existing ramp metering algorithms are slow to alleviate unexpected incident congestion. Based on the relationship between incident queue development and incident shock waves, two shock wave based incident ramp metering methods were developed in this study. The first method reacts to queue end arrivals; the second method proactively decreases incident queue propagation speed by creating cancelling shock waves in the opposite direction. A case study was conducted on a freeway corridor near Milwaukee, WI, using VISSIM simulation software by comparing the proposed methods with three prevailing ramp metering algorithms. The effects of several variables were also investigated including: demand level, incident severity, incident duration, incident location, and loop detector update frequency.
Download or read book An Integrated Traffic Responsive Ramp Control Strategy Via Nonlinear State Feedback written by H. Michael Zhang and published by . This book was released on 1995 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Advanced Real time Ramp Metering System ARMS the System Concept written by Jyh-Charn S. Liu and published by . This book was released on 1994 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Measurement for Centrally controlled Traffic responsive Ramp Metering Systems written by James H. Banks and published by . This book was released on 1987 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Coordinated Traffic Responsive Ramp Metering Strategies written by Klaus Bogenberger and published by . This book was released on 1999 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Equity Analysis of Freeway Ramp Metering written by Hamed Benouar and published by . This book was released on 2004 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
