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Author : Kenneth R. Agent
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.3/5 (555 download)
Download or read book Guidelines for the Use of Protected/permissive Left-turn Phasing written by Kenneth R. Agent and published by . This book was released on 1986 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Benjamin H. Cottrell
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (629 download)
Download or read book Guidelines for Protected Permissive Left Turn Signal Phasing written by Benjamin H. Cottrell and published by . This book was released on 1985 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Benjamin H. Cottrell
Publisher :
ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.3/5 (555 download)
Download or read book Guidelines for Exclusive/permissive Left-turn Signal Phasing written by Benjamin H. Cottrell and published by . This book was released on 1985 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research was to develop guidelines for the use of exclusive/permissive left-turn signal phasing. This was achieved by collecting data on traffic and roadway conditions for exclusive, exclusive/permissive, and permissive left-turn phasings and then analyzing the data to identify relationships between the left-turn phasings and traffic and roadway conditions. The guidelines addressed the following" (1) volume guidelines based on peak hour minimum left-turn volume and the product of the peak- hour left-turn and opposing volumes, (2) annual left-turn accident experience, (3) left-turn traffic conflict experience based on critical number and rates, (4) left-turn delay, and (5) site condition factors identified in the study
Author : Kenneth R. Agent
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (173 download)
Download or read book Guidelines for the Use of Protected/permissive Left-turn Phasing. Final Report written by Kenneth R. Agent and published by . This book was released on 1985 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : U.s. Department of Transportation
Publisher : CreateSpace
ISBN 13 : 9781508557173
Total Pages : 286 pages
Book Rating : 4.5/5 (571 download)
Download or read book Traffic Signal Timing Manual written by U.s. Department of Transportation and published by CreateSpace. This book was released on 2015-02-20 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : F. Adam King
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (19 download)
Download or read book Safety and Operations Guidance for Using Time-of-Day Protected-Permissive Left-Turn Phasing Using Flashing Yellow Arrows written by F. Adam King and published by . This book was released on 2019 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selection of the left-turn phasing mode is a significant decision for the safe and efficient movement of left-turning traffic at signalized intersections. Because of different safety and operational effects associated with the signal left-turn mode, the two must be evaluated concurrently and be balanced based on capacity and crash potential when protected-only, permissive-only, and protected-permissive left-turn (PPLT) phasing modes are compared. The choice between left-turn phasing modes can be made on a time-of-day basis so that changing traffic conditions are accommodated appropriately. The purpose of this study was to define guidance that field traffic engineers can use to select the appropriate left-turn mode based on prevailing traffic conditions by time of day. In particular, guidance on the use of PPLT or permissive-only with flashing yellow arrows (FYAs) to indicate permissive movements was of interest to the Virginia Department of Transportation (VDOT). Prior to the development of time-of-day guidance, the overall safety effects of converting between left-turn phase modes and indications (or displays) needed to be explored. The study examined the impact of converting from a circular “green ball” display for the permissive portion of PPLT phasing to the FYA signal indication and converting from protected-only phasing to PPLT with FYA. To quantify these conversions, a before-after evaluation of signal conversions was performed using standard Bayesian methods to develop crash modification factors from field data for 28 intersections in Virginia. For these intersections, the expected crash reduction after conversion from PPLT to PPLT-FYA was estimated as 12 percent (total crashes), 14 percent (fatal and injury crashes), and 30 percent (angle crashes), which was consistent with results from previous studies. In evaluating different left-turn phasing modes on a time-of-day basis, crash risk, left-turn conflicts, and capacity prediction models for permissive-only and PPLT modes were developed using simulation data. A total of 750 unique scenarios based on different combinations of intersection characteristics, traffic signal parameters, and traffic volumes were simulated in VISSIM, and trajectory files were processed using Surrogate Safety Assessment Model software to determine the number of conflicts per scenario. Based on the outputs of the simulation models, prediction models for determining left-turn capacities and the expected number of left-turn conflicts per hour per 100 left-turning vehicles were created using multiple linear regression. A final model predicting the average crash risk per hour based on the predicted number of conflicts was developed. The three models created were incorporated into a single spreadsheet tool that can be used by VDOT engineers in determining phasing mode on a time-of-day basis.
Author : Daniel B. Fambro
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.3/5 (555 download)
Download or read book Guidelines for Signalized Left-turn Treatments written by Daniel B. Fambro and published by . This book was released on 1981 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher Lynn Brehmer
Publisher : Transportation Research Board
ISBN 13 : 0309087570
Total Pages : 94 pages
Book Rating : 4.3/5 (9 download)
Download or read book Evaluation of Traffic Signal Displays for Protected/permissive Left-turn Control written by Christopher Lynn Brehmer and published by Transportation Research Board. This book was released on 2003 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zongzhong Tian
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.:/5 (1 download)
Download or read book Evaluation of Safety and Development of Guidelines for Protected/permitted Left-turn Signal Controls written by Zongzhong Tian and published by . This book was released on 2009 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 86 pages
Book Rating : 4.:/5 (921 download)
Download or read book Development of Guidelines for Permitted Left-turn Phasing Using Flashing Yellow Arrows written by and published by . This book was released on 2015 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project was to develop guidelines for time-of-day use of permitted left-turn phasing, which can then be implemented using flashing yellow arrows (FYA). This required determining how the risk for left-turn crashes varied as traffic-flow conditions varied during the course of a representative day. This was accomplished by developing statistical models, which expressed the risk of occurrence of a left-turn crash during a given hour as a function of the left-turn demand, the opposing traffic volume, and a classification of the approach with respect to the opposing traffic speed limit, the type of left-turn protection, and whether or not opposing left-turn traffic could obstruct sight distance. The models were embedded in a spreadsheet tool which will allow operations personnel to enter, for a candidate intersection approach, existing turning movement counts, and a classification of the approach with respect to speed limit, turn protection, and sight distance issues and receive a prediction of how the risk of left-turn crash occurrence varies throughout the day, relative to a user-specified reference condition.
Author :
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.3/5 (555 download)
Download or read book Assessment of Multiple Left-turn Phasing Strategies written by and published by . This book was released on 2004 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Missouri, multiple left-turns are gaining popularity. However, the installation of these multiple left-turn raises questions for which the Missouri Department of Transportation (MoDOT) has not yet developed answers. Specifically, MoDOT seeks guidance on: Criteria for determining when to install double and triple left-turns. The type of phasing to be used for dual and triple left-turn lanes. Whether to use "Dallas" or permitted lead-lag phasing for any left-turn lanes. Where to begin reducing the number receiving lanes downstream of an intersection with multiple left-turn lanes
Author :
Publisher :
ISBN 13 :
Total Pages : 190 pages
Book Rating : 4.3/5 (555 download)
Download or read book Safety Criteria for Protective And/or Permissive Left Turn Phasing written by and published by . This book was released on 1996 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 670 pages
Book Rating : 4.:/5 (318 download)
Download or read book Traffic Control Systems Handbook written by and published by . This book was released on 1976 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook, which was developed in recognition of the need for the compilation and dissemination of information on advanced traffic control systems, presents the basic principles for the planning, design, and implementation of such systems for urban streets and freeways. The presentation concept and organization of this handbook is developed from the viewpoint of systems engineering. Traffic control studies are described, and traffic control and surveillance concepts are reviewed. Hardware components are outlined, and computer concepts, and communication concepts are stated. Local and central controllers are described, as well as display, television and driver information systems. Available systems technology and candidate system definition, evaluation and implementation are also covered. The management of traffic control systems is discussed.
Author : Charles V. Zegeer
Publisher : DIANE Publishing
ISBN 13 : 1428995501
Total Pages : 164 pages
Book Rating : 4.4/5 (289 download)
Download or read book Pedestrian Facilities Users Guide: Providing Safety and Mobility written by Charles V. Zegeer and published by DIANE Publishing. This book was released on 2002 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide is intended to provide information on how to identify safety and mobility needs for pedestrians with the roadway right-of-way. Useful for engineers, planners, safety professionals and decision-makers, the guide covers such topics as: the Walking Environment including sidewalks, curb ramps, crosswalks, roadway lighting and pedestrian over and under passes; Roadway Design including bicycle lanes, roadway narrowing, reducing the number of lanes, one-way/two-way streets, right-turn slip lanes and raised medians; Intersections with roundabouts, T-intersections and median barriers; and Traffic calming designs.
Author : Hugh W. McGee
Publisher : Transportation Research Board
ISBN 13 : 0309258596
Total Pages : 93 pages
Book Rating : 4.3/5 (92 download)
Download or read book Guidelines for Timing Yellow and All-red Intervals at Signalized Intersections written by Hugh W. McGee and published by Transportation Research Board. This book was released on 2012 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB National Cooperative Highway Research Program (NCHRP) Report 731: Guidelines for Timing Yellow and All-Red Intervals at Signalized Intersections offers guidance for yellow change and all-red clearance intervals at signalized intersections. The guidelines provide a framework that can be easily applied by state and local transportation agencies.
Author : Zoltan Anthony Nemeth
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.3/5 (555 download)
Download or read book Guidelines for Left-turn Treatments at Signal Controlled Intersections written by Zoltan Anthony Nemeth and published by . This book was released on 1984 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph E. Hummer
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (274 download)
Download or read book Guidelines for the Use of Leading and Lagging Left Turn Signal Phasing written by Joseph E. Hummer and published by . This book was released on 1990 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
