Download or read book Safety Evaluation of Turning Movement Restrictions at Stop controlled Intersections written by Thanh Le and published by . This book was released on 2017 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical summary of the FHA report FHWA-17-064 program that studied the safety effects of converting three-legged, full movement intersections to right-in/right-out (RIRO) operations using physical barriers.
Download or read book Safety Evaluation of Turning Movement Restrictions at Stop controlled Intersections written by Thanh Le (Highway engineer) and published by . This book was released on 2018 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Safety Evaluation of Turning Movement Restrictions at Stop controlled Intersections written by and published by . This book was released on 2017 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Low cost Safety Enhancements for Stop controlled and Signalized Intersections written by and published by . This book was released on 2009 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The purpose of this document is to present information on suggested effective, low-cost intersection countermeasures developed using intersection safety research results and input from an intersection safety expert panel. These low-cost countermeasures can be applied to a large number of intersections with a high frequency of crashes using a systematic approach. The net impact of such an approach can produce significant reductions in statewide intersection crashes, fatalities, and serious injuries. Low-cost countermeasures are defined as those ranging from $1,000 to $50,000 per intersection"--Page 4
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.
Download or read book Roundabouts written by Lee August Rodegerdts and published by Transportation Research Board. This book was released on 2010 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts. This report updates the U.S. Federal Highway Administration's Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.
Download or read book Safety Evaluation of Signalized Restricted Crossing U turn Intersections written by Joseph E. Hummer and published by . This book was released on 2017 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical summary of the FHA report FHWA-HRT-17-082 program that studied evaluated restricted crossing U-turn (RCUT) intersection and was conducted by the DCMF program for the Evaluation of Low-Cost Safety Improvements Pooled Fund Study.
Download or read book Safety Evaluation of Multiple Strategies at Stop controlled Intersections written by Thanh Le and published by . This book was released on 2017 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical summary of the FHA report FHWA-HRT-17-086 program that studied the safety performance of various stop-controlled intersections for the Evaluation of Low-Cost Safety Improvements Pooled Fund Study. This study evaluated the safety effectiveness of multiple low-cost treatments at stop-controlled intersections.
Download or read book Safety Evaluation of Multiple Strategies at Stop controlled Intersections written by Thanh Le (Highway engineer) and published by . This book was released on 2018 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Development of Crash Modification Factors program studied the safety performance of various stop-controlled intersections for the Evaluation of Low-Cost Safety Improvements Pooled Fund Study. This study evaluated the safety effectiveness of multiple low-cost treatments at stop-controlled intersections. Improvements included basic signing and pavement markings. This strategy is intended to reduce the frequency and severity of crashes at stop-controlled intersections by alerting drivers to the presence and type of approaching intersection. Geometric, traffic, and crash data were obtained at three- and four-legged, two- and four-lane major road, and urban and rural stop-controlled intersections in South Carolina. To account for potential selection bias and regression to the mean, an empirical Bayesian before-after analysis was conducted, using reference groups of untreated intersections with similar characteristics to the treated sites. The analysis also controlled for changes in traffic volumes throughout time and time trends in crash counts unrelated to the treatments. The aggregate results indicate reductions for all crash types analyzed (i.e., total, fatal and injury, rear-end, right-angle, and nighttime). The reductions are statistically significant at the 95-percent confidence level for all crash types. For all crash types combined, the crash modification factors (CMFs) are 0.917 for all severities and 0.899 for fatal and injury crashes. The CMFs for rear-end, right-angle, and nighttime crashes are 0.933, 0.941, and 0.853, respectively. The benefit-cost ratio estimated with conservative cost and service life assumptions is 12.4 to 1 for total crashes at unsignalized intersections. The results suggest that the multiple low-cost treatments, even with conservative assumptions on cost, service life, and the value of a statistical life, can be cost effective.
Download or read book Safety Evaluation of Restricted Crossing U turn Intersection written by and published by . This book was released on 2017 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document is a technical summary of the Federal Highway Administration report Development of a Crash Modification Factor for Signalized RCUTs (FHWA-HRT-17-082). This research examined the safety impacts of replacing a traditional signalized intersection with a signalized restricted crossing U-turn intersection (RCUT). An RCUT is defined as a three-approach or four-approach intersection where minor street left-turn and through movements (if any) are rerouted to one-way downstream U-turn crossovers. The objective was to estimate the safety effectiveness of this strategy as measured by crash frequency. The primary measures examined were based on total crashes and fatal and injury crashes. A further objective was to conduct a spatial patterns analysis, assessing notable clusters of crashes, as well as changes to crash types and day/night between the before and after periods.
Download or read book Safety Evaluation of Multiple Strategies at Stop controlled Intersections written by and published by . This book was released on 2017 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Safety Evaluation of Right Turns Followed by U turns at Signalized Intersections 6 Or More Lane Arterials as an Alternative to Direct Left Turns written by Lu, Jian John Lu and published by . This book was released on 2005 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of J turn Design Performance in Missouri written by Sawyer Breslow and published by . This book was released on 2013 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research shows that a high percentage of crashes that take place on high-speed rural expressways occur at intersections with minor roads. One low-cost alternative design for improving safety of at-grade intersections on such expressways is the J-turn. In the last few years the Missouri Department of Transportation has converted some two-way stop controlled (TWSC) intersections into J-turns. In a TWSC intersection on a four lane divided highway vehicles accessing the major highway from the minor road could make a left turn or through movement at the intersection by crossing the major road movements. On the other hand, in a J-turn design vehicles accessing the major highway from the minor road make a right turning movement and then use a U-turn at a downstream location. The major road vehicles accessing the minor road via a left turning movement may or may not have to use the U-turn for their movements. This study evaluated the effectiveness of J-turn intersection design in Missouri using field studies, a public survey, crash analysis, and traffic conflict analysis. The field studies collected detailed video data at a J-turn site and a control site. The crash analysis included a statistically rigorous Empirical Bayes (EB) before-after safety evaluation. The EB study found that the J-turn design resulted in a 30% reduction in the crash frequency for all crashes and a 47.9% reduction in the crash frequency for all injury and fatal crashes. Both reductions were statistically significant at the 95% confidence level. The disabling injury crashes and minor injury crashes per year decreased by 86% and 45%, respectively. None of the five sites had a fatal crash occur after the J-turn was implemented. The elimination of fatal crashes and a significant reduction in disabling injury crashes are substantial safety improvements offered by the J-turn design. One of the most severe crash types, the left turn right angle crashes was completely eliminated by the J-turn. Rear-end, sideswipe, and passing crashes also decreased post J-turn implementation. The average time to collision conflict measure for the minor road turning vehicles at the J-turn site was found to be four times higher than the value at the control TWSC site, thus indicating higher safety at the J-turn site. The average wait time at the J-turn site was half the wait time at the control site while the average travel time at the J-turn site was about one minute higher than the TWSC site. When the public was surveyed on how they felt the additional travel time of the J-turn affected their trip, the majority said that there was no adverse effect. A high percentage of minor road left-turning and through movements at the J-turn site merged into the travel lanes within the first 400 feet of the acceleration lane. The public opinion of the J-turn at US 63 and Deer Park Road was mixed. Some of the common concerns raised by the respondents included difficulty in merging after the U-turn, improper use of acceleration and deceleration lanes, insufficient U-turn radius to accommodate large vehicles, and driver confusion. The J-turn on US 63 and Deer Park Road was designed per the available standards within the geometric constraints of the site and properly signed per the MUTCD. This J-turn design was a retrofit, similar to most other J-turn sites in Missouri, thus requiring designers to work within the available space and geometric constraints.
Download or read book Observational Before after Studies in Road Safety Estimating the Effect of Highway and Traffic Engineering Measures on Road Safety written by Ezra Hauer and published by . This book was released on 1997 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Urban Bikeway Design Guide Second Edition written by National Association of City Transportation Officials and published by Island Press. This book was released on 2014-03-24 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: NACTO's Urban Bikeway Design Guide quickly emerged as the preeminent resource for designing safe, protected bikeways in cities across the United States. It has been completely re-designed with an even more accessible layout. The Guide offers updated graphic profiles for all of its bicycle facilities, a subsection on bicycle boulevard planning and design, and a survey of materials used for green color in bikeways. The Guide continues to build upon the fast-changing state of the practice at the local level. It responds to and accelerates innovative street design and practice around the nation.
Download or read book Intersection and Interchange Design written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1993 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
