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Author : Hasan Ozer
Publisher :
ISBN 13 :
Total Pages : 91 pages
Book Rating : 4.:/5 (958 download)
Download or read book Safety Evaluation of Flashing Yellow Arrows for Protected/permissive Left-turn Control written by Hasan Ozer and published by . This book was released on 2016 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Alan Noyce
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (273 download)
Download or read book Evaluation of the Flashing Yellow Arrow Permissive-only Left-turn Indication Field Implementation written by David Alan Noyce and published by . This book was released on 2007 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this research was to evaluate the safety of the flashing yellow arrow (FYA) permissive only left-turn indication field installations. The ability of the FYA indication to improve safety was evaluated with respect to crash experience. Findings of the crash analysis were interpreted with respect to other variables such as signal phasing, vehicle flow rates, posted speed limits, and intersection geometry. The scope of this research included all known installations of the FYA prior to the commencement of this research.
Author :
Publisher :
ISBN 13 :
Total Pages : 103 pages
Book Rating : 4.:/5 (925 download)
Download or read book Evaluation of the Flashing Yellow Arrow (FYA) Permissive Left-turn in Shared Yellow Signal Sections written by and published by . This book was released on 2014 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this research was to evaluate the safety of the flashing yellow arrow (FYA) permissive only left-turn indication field installations. The ability of the FYA indication to improve safety was evaluated with respect to crash experience. Findings of the crash analysis were interpreted with respect to other variables such as signal phasing, vehicle flow rates, posted speed limits, and intersection geometry. The scope of this research included all known installations of the FYA prior to the commencement of this research.
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 : Peina Yuan
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (98 download)
Download or read book Safety of Flashing Yellow Arrow Indication with Protected-Permissive Left-Turn (PPLT) Operation written by Peina Yuan and published by . This book was released on 2013 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kailas Venkitasubramanian
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (841 download)
Download or read book An Evaluation of Effectiveness of Flashing Yellow Arrow Signal for Left-turns written by Kailas Venkitasubramanian and published by . This book was released on 2008 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis evaluated the effectiveness of flashing yellow arrow (FYA) permitted left-turn signals in reducing conflicts and events at intersections. A FYA permissive signal is a recent treatment used as an alternate to circular green signal at signalized intersections. It is the newest addition to the series of permitted left-turn signal indicators and has been designed to improve the clarity of indication among drivers. The signal is expected to result in safer turning movements during the permitted phase. Conflict data was collected during morning peak period (7:00 AM to 9:00 AM) and evening peak period (4:00 PM to 8:00 PM) at four study intersections in Charlotte. Data was collected before the installation of FYA signal was introduced and after one month, three months and six months of installation of FYA. Relevant types of conflicts and events associated with left-turn maneuver were observed and recorded. Descriptive statistics, proportions of conflicts/events and statistical tests were conducted to analyze the data collected. Conflicts and events were also analyzed separately for each intersection using various comparison sets to understand their trend over time and the impact of FYA on them. Observations and analysis indicated that benefits in terms of reduction in conflicts and events are substantial at 7th Street / 5th Street intersection and Mallard Creek Church Road / 1-85 Southbound interchange but are marginal and currently statistically insignificant at Sunset Road / 1-77 interchanges. Overall, FYA leaves a positive effect on the intersection safety, helps reduce vehicular conflicts/events and is suitable for application at other intersections in the future.
Author : Kerrie L. Schattler
Publisher :
ISBN 13 :
Total Pages : 33 pages
Book Rating : 4.:/5 (893 download)
Download or read book Driver Comprehension and Operations Evaluation of Flashing Yellow Arrows written by Kerrie L. Schattler and published by . This book was released on 2013 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: In spring 2010, the Illinois Department of Transportation initiated an areawide implementation of the flashing yellow arrow (FYA) as the display for the left-turn permissive interval at more than 100 intersections operating with protected/permissive left-turn (PPLT) control in the Peoria, Illinois, area. Bradley University researchers evaluated the effectiveness of FYAs on driver comprehension and traffic operations. A total of 363 drivers completed an online static survey that included seven left-turn scenarios that portrayed the protected and permissive indications of PPLT phasing, with the flashing modes being animated. The results of the survey indicated that drivers had a high comprehension of both the circular green (CG) and FYA permissive left-turn indications. However, the survey results provided evidence of some drivers' misinterpreting the meaning of a permissive left-turn with CG display and incorrectly and unsafely interpreting the meaning as "go" under some circumstances. With supplemental traffic signs present, drivers' understanding of the correct action to take when confronted with a FYA significantly increased, and the percentage of fail-critical, incorrect "go" responses significantly decreased. Before and after field observations, including 128 hours of data collected at 16 study approaches, were collected; and the following variables were investigated: critical gap, left-turn red-light running and yellow-light running, and traffic conflicts.Overall, the findings of this study suggest that drivers in the Peoria, Illinois, area had high comprehension and acceptance of the FYA message. Additionally, the FYA did not appear to have any negative impacts on traffic operations.
Author : Meshal Ibrahim Almoshaogeh
Publisher :
ISBN 13 :
Total Pages : 289 pages
Book Rating : 4.:/5 (91 download)
Download or read book Evaluating the Effectiveness of Conversion of Traditional Five Section Head Signal to Flashing Yellow Arrow (FYA) Signal written by Meshal Ibrahim Almoshaogeh and published by . This book was released on 2014 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the United States, there are two schemes of operating traffic signal controls for permitted protected left turns (PPLT) namely the traditional five-section head system (known as Dog-House) and the flashing yellow arrow system (FYA). Past studies have agreed that these controls lead to decrease the average delay per left turn vehicle, decrease the protected green time, increase the left turn capacity, and enhance the intersection overall operation. The flashing yellow arrow (FYA) has been approved by the Federal Highway Administration as the national standard for the PPLT operations at signalized intersections. So, the Florida Department of Transportation also approved this new system and they are extensively replacing the traditional system with the new system on the area of Central Florida (Lin, et al, 2010). Both these systems have been used for a long time and there are some studies that evaluated these systems but there are limited number of projects that evaluated and/or compared between the two PPLT systems from the operational perspective.
Author : Florida. Department of Transportation. Research Center
Publisher :
ISBN 13 :
Total Pages : 89 pages
Book Rating : 4.:/5 (884 download)
Download or read book Dynamic Flashing Yellow Arrow (FYA) written by Florida. Department of Transportation. Research Center and published by . This book was released on 2013 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a need to develop an interactive and efficient framework to serve as a decision support system (DSS) for the evaluation of left-turn phasing alternative based on intersection conditions. This framework will allow (1) an interactive evaluation of left-turn phasing and ultimately recommend phasing mode by time-of-day and (2) Traffic Management Center (TMC) data to be fed into the DSS so that intersections requiring attention/modification of left-turn mode can be flagged. The current study develops an interactive DSS for assessing the likely benefits of warranting a permitted left-turn phase using custom design approach. The developed DSS is designed to predict these benefits based on multilevel factorial parameters that are practical and applicable to assist TMCs in evaluating the efficiency of a permitted left-turn phase by time of day.
Author :
Publisher :
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.3/5 (555 download)
Download or read book Flashing Yellow Protected/permissive Signal Evaluation written by and published by . This book was released on 1985 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: A determination of the differences between flashing yellow and circular green permissive signal indications displayed to motorists in a separate left turn lane with a separate indication.
Author : Susan Elizabeth Chambers
Publisher :
ISBN 13 :
Total Pages : 218 pages
Book Rating : 4.:/5 (971 download)
Download or read book Flashing Yellow Arrow Traffic Signal Operation written by Susan Elizabeth Chambers and published by . This book was released on 2016 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACTThis study examines the methodology for converting protected, permissive, and protected/permissive left-turn operation to flashing yellow arrow left-turn operation. This study addresses construction-related considerations, including negative offsets, lateral traffic signal head position, left-turn accident rates, crash modification factors and crash reductions factors. A total of 85 intersections in Glendale, Arizona were chosen for this study. These intersections included 45 "arterial to arterial" intersections (a major road intersecting with a major road) and 40 "arterial to collector" intersections (a major road intersecting with a minor road). This thesis is a clinical study of the field conversion to flashing yellow arrow traffic signals and is not a study of the merits of flashing yellow arrow operation. This study included six categories: 1. High accident intersections (for inclusion in Highway Safety Improvement Program (HSIP) funding); 2. Signal head modifications only; 3. Signal head replacement with median modifications; 4. Signal head and mast arm replacement; 5. Signal head, signal pole and mast arm replacement; and 6. Intersections where flashing yellow arrow operation is not recommended. Compliance with the Manual on Uniform Traffic Control Devices (MUTCD) played a large part in determining conversion costs because the standard for lateral position of the left-turn traffic signal greatly influenced the construction effort. Additionally, the left-turning vehicles sight distance factored into cost considerations. Its important for agencies to utilize this study to understand all of the financial commitments and construction requirements for conversion to flashing yellow arrow operation, and ultimately to appreciate that the process is not purely a matter of swapping traffic signal heads.
Author : Min Zhang
Publisher :
ISBN 13 :
Total Pages : 144 pages
Book Rating : 4.:/5 (95 download)
Download or read book Evaluation of the Safety Performance of the Flashing Yellow Arrow Signal Indication written by Min Zhang and published by . This book was released on 2012 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ali Hajbabaie
Publisher :
ISBN 13 :
Total Pages : 109 pages
Book Rating : 4.:/5 (124 download)
Download or read book Safety and Operations Assessment of Various Left-turn Phasing Strategies written by Ali Hajbabaie and published by . This book was released on 201? with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gary A. Davis
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Driver Comprehension of Flashing Yellow Arrows written by Gary A. Davis and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2009, the FHWA’s Manual on Uniform Traffic Control Devices (MUTCD) introduced the flashing yellow arrow (FYA) traffic signal as an alternative to circular green (CG) to indicate permitted left turns. The FYA is arguably a more intuitive indication that left turns are permitted but not protected and, in addition, the FYA signal heads can support time-of-day changes between protective and permissive left -turn phasing. In 2019, a Research Needs Statement stated that “Research is needed to examine driver comprehension of flashing yellow arrows in different light arrangements and the role of signage.” Our objective in this project was to assess drivers’ understanding of FYA signal indications and to see if the presence or absence of “Left Turn Yield” signs affect gap acceptance. This was accomplished by conducting an online survey of drivers regarding their understanding of FYA signals and by carrying out a field study of drivers’ gap acceptance at a set of Twin Cities intersections.
Author : Robert Rescot
Publisher :
ISBN 13 : 9781622603480
Total Pages : pages
Book Rating : 4.6/5 (34 download)
Download or read book Evaluation of Flashing Yellow Arrow Traffic Signals in Indiana written by Robert Rescot and published by . This book was released on 2015-09-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The evaluation of Flashing Yellow Arrow signals for widespread implementation was evaluated. Through the collection of field driver performance data, survey data, crash data, at two test sites in the State, it was concluded that this is a worthwhile practice to be considered for a larger scale deployment. The return on investment includes both increased safety, and improved mobility. Given Indiana's widespread usage of span and catenary signal supports, installation could be simplified to place a larger four section flashing yellow head in a horizontal orientation while leaving adjacent through lane three section signal heads in a vertical alignment, and not decrease the standard of care provided to the public, given proper engineering judgment.indeed
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 : ITE (Institute of Transportation Engineers)
Publisher : John Wiley & Sons
ISBN 13 : 1118762304
Total Pages : 688 pages
Book Rating : 4.1/5 (187 download)
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.
