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An Evaluation Of The Safety Effectiveness Of Offsetting Opposing Left Turn Lanes At Intersections
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Book Synopsis An Evaluation of the Safety Effectiveness of Offsetting Opposing Left-turn Lanes at Intersections by : Bhaven Naik
Download or read book An Evaluation of the Safety Effectiveness of Offsetting Opposing Left-turn Lanes at Intersections written by Bhaven Naik and published by . This book was released on 2004 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Safety Evaluation of Left-turn Lane Line Width at Intersections with Opposing Left-turn Lanes by : Aemal Jan Khattak
Download or read book Safety Evaluation of Left-turn Lane Line Width at Intersections with Opposing Left-turn Lanes written by Aemal Jan Khattak and published by . This book was released on 2004 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Safety Evaluation of Offset Improvements for Left-turn Lanes by :
Download or read book Safety Evaluation of Offset Improvements for Left-turn Lanes written by and published by . This book was released on 2009 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Federal Highway Administration (FHWA) organized a pooled fund study of 26 States to evaluate low-cost safety strategies as part of its strategic highway safety effort. One of the strategies chosen to be evaluated for this study was offset improvements for left-turn lanes. This strategy is intended to reduce the frequency of crashes by providing better visibility for drivers that are turning left. The safety effectiveness of this strategy has not been thoroughly documented, and this study is an attempt to provide an evaluation through scientifically rigorous procedures"--Technical report documentation page.
Book Synopsis Safety Effectiveness of Intersection Left- and Right-turn Lanes by : Douglas W. Harwood
Download or read book Safety Effectiveness of Intersection Left- and Right-turn Lanes written by Douglas W. Harwood and published by . This book was released on 2002 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of research that performed a well-designed before-after evaluation of the safety effects of providing left- and right-turn lanes for at-grade intersections. Geometric design, traffic control, traffic volume, and traffic accident data were gathered for a total of 280 improved intersections, as well as 300 similar intersections that were not improved during the study period. The types of improvement projects evaluated included installation of added left-turn lanes, added right-turn lanes, and extension of the length of existing left- or right-turn lanes. An observational before-after evaluation of these projects was performed using several alternative evaluation approaches. The three contrasting approaches to before-after evaluation used were the yoked comparison or matched-pair approach, the comparison group approach, and the Empirical Bayes approach. The research not only evaluated the safety effectiveness of left- and right-turn lane improvements, but also compared the performance of these three alternative approaches in making such evaluations. The research developed quantitative safety effectiveness measures for installation design improvements involving added left-turn lanes and added right-turn lanes. The research concluded that the Empirical Bayes method provided the most accurate and reliable results. Further use of this method is recommended.
Book Synopsis Development of Left-turn Lane Guidelines for Signalized and Unsignalized Intersections by :
Download or read book Development of Left-turn Lane Guidelines for Signalized and Unsignalized Intersections written by and published by . This book was released on 2004 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is generally accepted that the level of service (LOS) at intersections significantly affects the overall LOS of the road system. It is also known that the LOS at an intersection can be adversely affected by frequently allowing left-turning vehicles to block through traffic. In addition, crash rates tend to be higher at intersections than on through sections of a road. The separation of left-turning vehicles from through traffic is therefore an important condition for the safe and effective operation of intersections. Existing guidelines for installing left-turn lanes have several limitations. They are mainly based on the traffic volumes at the intersection, and they use deterministic models with fixed gap acceptance and/or left-turn maneuver times. In addition, the guidelines for left-turn lanes for unsignalized intersections and signalized intersections must be specific for the type of intersection. In this study, new left-turn guidelines for both unsignalized and signalized intersections were developed on the basis of well-validated event-based simulation programs. Guidelines for unsignalized intersections were based on the percentage of left turns blocking through vehicles, whereas the guidelines for signalized intersections were developed using a minimum left-turn volume of either 85% left-turn capacity or LOS E delay (55 seconds/vehicle). In addition to the general guidelines, a prioritization tool that can be used to prioritize candidate intersections was developed. The prioritization tool accounts for both operational and safety aspects.
Author :U. S. Department Of Transportation Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723230820 Total Pages :50 pages Book Rating :4.2/5 (38 download)
Book Synopsis Safety Evaluation of Offset Improvements for Left-Turn Lanes [electronic Resource] / by : U. S. Department Of Transportation
Download or read book Safety Evaluation of Offset Improvements for Left-Turn Lanes [electronic Resource] / written by U. S. Department Of Transportation and published by Createspace Independent Publishing Platform. This book was released on 2018-07-18 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safety evaluation of offset improvements for left-turn lanes [electronic resource] /
Book Synopsis Design Standards for Unobstructed Sight Lines at Left-turn Lanes by : William F. Bremer
Download or read book Design Standards for Unobstructed Sight Lines at Left-turn Lanes written by William F. Bremer and published by . This book was released on 2019 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Past research has clearly shown that obstructed sight lines at intersections lead to greater possibilities of collisions between left-turning vehicles and opposing oncoming vehicles. Evaluations of the effects of left-turn lane offsets, reported that positive left-turn lane offsets were more effective in reducing intersection left-turn crashes than zero and negative left-turn offsets. Several researchers have developed guidelines for geometric design elements of left-turn offset. The majority of states provide only a limited discussion on this topic. Florida DOT provides the most comprehensive policies and guidance for assuring unobstructed sight lines at left-turn lanes. Recommendations developed in this project center on general policies and guidance for designing offset left-turn lanes for a new edition of MnDOT’s Road Design Manual. Recommendations are organized to provide standards, policies, and guidance for new/reconstruction projects and for preservation projects. Topics covered include definition of left-turn lane offset, design factors impacting offset, suggested designs for urban and rural multilane roadways and expressways, accommodating U-turns, pedestrian and bicyclist considerations as well as winter maintenance considerations. Additional recommendations are offered to improve consistency among all MnDOT manuals and guides used for intersection design and operation.
Author :ITE (Institute of Transportation Engineers) Publisher :John Wiley & Sons ISBN 13 :1118762304 Total Pages :688 pages Book Rating :4.1/5 (187 download)
Book Synopsis Traffic Engineering Handbook by : ITE (Institute of Transportation Engineers)
Download or read book Traffic Engineering Handbook written by ITE (Institute of Transportation Engineers) and published by John Wiley & Sons. This book was released on 2016-01-26 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get a complete look into modern traffic engineering solutions Traffic Engineering Handbook, Seventh Edition is a newly revised text that builds upon the reputation as the go-to source of essential traffic engineering solutions that this book has maintained for the past 70 years. The updated content reflects changes in key industry standards, and shines a spotlight on the needs of all users, the design of context-sensitive roadways, and the development of more sustainable transportation solutions. Additionally, this resource features a new organizational structure that promotes a more functionally-driven, multimodal approach to planning, designing, and implementing transportation solutions. A branch of civil engineering, traffic engineering concerns the safe and efficient movement of people and goods along roadways. Traffic flow, road geometry, sidewalks, crosswalks, cycle facilities, shared lane markings, traffic signs, traffic lights, and more—all of these elements must be considered when designing public and private sector transportation solutions. Explore the fundamental concepts of traffic engineering as they relate to operation, design, and management Access updated content that reflects changes in key industry-leading resources, such as the Highway Capacity Manual (HCM), Manual on Uniform Traffic Control Devices (MUTCD), AASSHTO Policy on Geometric Design, Highway Safety Manual (HSM), and Americans with Disabilities Act Understand the current state of the traffic engineering field Leverage revised information that homes in on the key topics most relevant to traffic engineering in today's world, such as context-sensitive roadways and sustainable transportation solutions Traffic Engineering Handbook, Seventh Edition is an essential text for public and private sector transportation practitioners, transportation decision makers, public officials, and even upper-level undergraduate and graduate students who are studying transportation engineering.
Book Synopsis Guidelines and Recommendations to Accommodate Older Drivers and Pedestrians by : L. K. Staplin
Download or read book Guidelines and Recommendations to Accommodate Older Drivers and Pedestrians written by L. K. Staplin and published by . This book was released on 2001 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Warrants for Installation of Dual Right-turn Lanes at Signalized Intersections by : Yi Qi
Download or read book Development of Warrants for Installation of Dual Right-turn Lanes at Signalized Intersections written by Yi Qi and published by . This book was released on 2012 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Right-turn lanes provide space for the deceleration and storage of right-turn vehicles, and separate turning vehicles from through movements. Dual right-turn lanes are increasingly used at urban intersections primarily for two reasons: (1) to accommodate high right-turn demands and avoid turn-pocket overflows, and/or (2) to prevent right-turn vehicles that exit from a nearby upstream freeway off-ramp (on the left of the roadway) from abruptly changing too many lanes toward the right-turn lane at the intersection. In addition, a number of other factors may affect the decisions on the installation of dual right-turn lanes. However, warrants for dual right lane installation are almost non-existent, leaving traffic engineers to rely on engineering judgment. This research aims to develop warrants for installation of dual right-turn lanes at signalized intersections. Both the operational and safety benefits/costs were analyzed by surveying traffic engineers and by conducting traffic simulation-based analysis. Microscopic traffic simulation model, VISSIM, was used to quantify the operation benefits and Surrogate Safety Assessment Model (SSAM) developed by Siemens was used to analyze the safety gains due to installation of dual right-turn lanes.
Book Synopsis Safety Evaluation of Continuous Green T Intersections by : Eric T. Donnell
Download or read book Safety Evaluation of Continuous Green T Intersections written by Eric T. Donnell and published by . This book was released on 2016 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Safety Effectiveness of Highway Design Features: Intersections by :
Download or read book Safety Effectiveness of Highway Design Features: Intersections written by and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Traffic Signal Timing Manual by : U.s. Department of Transportation
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.
Book Synopsis Cost-Effectiveness Evaluation of Turning Lanes on Uncontrolled Approaches of Rural Intersections by : Patrick T. McCoy
Download or read book Cost-Effectiveness Evaluation of Turning Lanes on Uncontrolled Approaches of Rural Intersections written by Patrick T. McCoy and published by . This book was released on 1984 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of turning lanes on uncontrolled approaches of rural intersections. Construction and maintenance costs, safety, and guidelines used to warrant turning lane construction based on traffic volumes are included.
Book Synopsis Safety effectiveness of intersection left- and right-turn lanes by :
Download or read book Safety effectiveness of intersection left- and right-turn lanes written by and published by . This book was released on 2002 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Safety and Development of Guidelines for Protected/permitted Left-turn Signal Controls by : Zongzhong Tian
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:
Book Synopsis Offset Right-turn Lanes for Improved Intersection Sight Distance by : Karen S. Schurr
Download or read book Offset Right-turn Lanes for Improved Intersection Sight Distance written by Karen S. Schurr and published by . This book was released on 2010 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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