An Evaluation of Leading Versus Lagging Left Turn Signal Phasing PDF Download
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Author:
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 42
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Book Description
Author:
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 42
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Book Description
Author: Joseph E. Hummer
Publisher:
ISBN:
Category :
Languages : en
Pages : 74
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Book Description
Author: Christopher Lynn Brehmer
Publisher: Transportation Research Board
ISBN: 0309087570
Category : Information display systems
Languages : en
Pages : 94
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Book Description
Author: Jim C. Lee
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 222
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Book Description
This project was undertaken to compare operational and safety characteristics of leading versus lagging protected left turn operation. The measures of effectiveness included field measured intersection delay with leading and with lagging left turns. Intersections in Pima County, Glendale, Tempe and Mesa, Arizona were studied with both leading and lagging operation. Intersection delay studies were also done with first car versus third car actuation of leading protected left turn phases. Signal progression was studied with leading, lagging and combination of leading and lagging left turns which provided the best progression. This evaluation was accomplished with an instrumented vehicle and travel time runs throughout a grid. Accident studies were conducted in Tucson, Pima County and Scottsdale, Arizona. These studies compared accident frequency before and after the conversion from leading to lagging left turns. A public opinion survey was conducted to obtain motorists' preference of leading or lagging left turns.
Author:
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ISBN:
Category :
Languages : en
Pages : 88
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Author:
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 100
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Book Description
Author: U.s. Department of Transportation
Publisher: CreateSpace
ISBN: 9781508557173
Category : Transportation
Languages : en
Pages : 286
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Book Description
This report serves as a comprehensive guide to traffic signal timing and documents the tasks completed in association with its development. The focus of this document is on traffic signal control principles, practices, and procedures. It describes the relationship between traffic signal timing and transportation policy and addresses maintenance and operations of traffic signals. It represents a synthesis of traffic signal timing concepts and their application and focuses on the use of detection, related timing parameters, and resulting effects to users at the intersection. It discusses advanced topics briefly to raise awareness related to their use and application. The purpose of the Signal Timing Manual is to provide direction and guidance to managers, supervisors, and practitioners based on sound practice to proactively and comprehensively improve signal timing. The outcome of properly training staff and proactively operating and maintaining traffic signals is signal timing that reduces congestion and fuel consumption ultimately improving our quality of life and the air we breathe. This manual provides an easy-to-use concise, practical and modular guide on signal timing. The elements of signal timing from policy and funding considerations to timing plan development, assessment, and maintenance are covered in the manual. The manual is the culmination of research into practices across North America and serves as a reference for a range of practitioners, from those involved in the day to day management, operation and maintenance of traffic signals to those that plan, design, operate and maintain these systems.
Author:
Publisher:
ISBN:
Category : Transportation
Languages : en
Pages : 574
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 1204
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Book Description
Author: Jonathan Upchurch
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 220
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Book Description
This study dealt with five types of left turn signal phasing: permissive, leading exclusive, lagging exclusive, leading exclusive/permissive, and lagging exclusive/permissive. The objectives of this research project were to: (1) develop a research work plan to conduct a statistically valid study for the development of numerical warrants for left turn movements; and (2) prepare a database of available information on signalized intersections and select the intersections to be used in the future study. This report describes the database of Arizona signalized intersections created in this project, the findings on left turn accident rates for different types of left turn phasing (using a nonrandom sample), and results of a validation study of the TEXAS computer simulation model. It also presents a research work plan for a future research project.
