Download or read book Impact of Non freeway Rumble Strips written by Tapan K. Datta and published by . This book was released on 2012 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an effort to reduce lane-departure crashes, in 2008 the Michigan Department of Transportation (MDOT) began a three-year statewide non-freeway rumble strip installation initiative. This initiative called for the installation of milled centerline rumble strips on all rural non-freeway highways with a posted speed limit of 55 mph and a paved roadway width greater than 20 ft and shoulder rumble strips on roadways with paved shoulders that were at least 6 ft wide. Approximately 5,400 miles of non-freeway roadways were ultimately included in this rumble strip installation initiative. As this initiative was believed to be the largest of its kind in the United States at the time, it was important for MDOT to evaluate the impacts associated with the rumble strip installations to provide guidance for future implementation both within Michigan and other states. The objectives of this study included: Identification and analysis of "Before" traffic crashes; Assessment of impact of rumble strips on driver behavior, bicyclist safety, roadside noise, and shortterm pavement performance. Several field data collection efforts were undertaken in order to accomplish the objectives. Based on the results of the evaluation, it is concluded that rumble strips on high-speed non-freeway highways improves driver performance on most highways and traffic scenarios. Vehicles produced higher levels of roadside noise when traveling over the rumble strips compared to normal passbys. The rumble strip noise typically did not exceed the roadside noise level produced by tractor trailer trucks traveling on normal highways. Finally, centerline rumble strips did not contribute to short-term transverse cracking are in asphalt pavements. Three years of "Before" crash data were analyzed to identify the target crashes that is expected to be alleviated by the installation of centerline rumble strips on MDOT's high-speed trunkline (non-freeway) system.
Download or read book Evaluation of Non freeway Rumble Strips Phase II written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: MDOT's rumble strip program for two-lane high speed rural highways was initiated in 2008 and continued through 2010. This program included implementation of centerline rumble strips (CLRS) on nearly 5,400 miles of two-lane high speed roads that MDOT maintains. This program presented an opportunity to perform a comprehensive evaluation of safety performance of rumble strips, especially CLRS. A two-phase evaluation study of the program was launched to estimate the driver behavioral and performance improvement in the presence of CLRS on two-lane high speed highways and also perform a system-wide "Before" and "After" study of target traffic crashes. The driver behavior-related study and collection of the three years' "Before" crash data and analysis was performed in Phase I (OR09084A) and the Phase II study was performed to collect the three years of "After" crash data, a program evaluation study, and benefit-cost analysis. The crash analysis indicated statistically significant reductions in all target crashes including, head-on, sideswipe opposite and run-off-the-road left. The study of crashes and their severity resulted in the reduction in fatal and all categories of injury crashes including a 47% reduction in total target crashes and a 51% reduction in target fatal crashes. An economic analysis of the rumble strip program resulted in a benefit-cost ratio of the program to be in the range of 58:1 to 18:1 based on discount rate assumptions of 2% and 10%, respectively. A road user survey indicated strong agreement among the respondents that CLRS is a beneficial safety improvement program.
Download or read book Guidance for the Design and Application of Shoulder and Centerline Rumble Strips written by Darren J. Torbic and published by Transportation Research Board. This book was released on 2009 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides guidance for the design and application of shoulder and centerline rumble strips as an effective crash reduction measure, while minimizing adverse effects for motorcyclists, bicyclists, and nearby residents. Using the results of previous studies and the research conducted under this project, safety effectiveness estimates were developed for shoulder rumble strips on rural freeways and rural two-lane roads and for centerline rumble strips on rural and urban two-lane roads.
Download or read book Effects of Center line Rumble Strips on Non conventional Vehicles written by Kenneth W. Miller and published by . This book was released on 2008 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Centerline rumble strips are being installed on rural Minnesota Highways in an effort to reduce crossover accidents. This study looks for possible detrimental effects on 2 and 3 wheeled cycles. Motorcycle accidents reports since centerline rumble strips first appeared on rural highways in 1999 revealed only 29 accidents on roads with the rumble strips. None of these reports implicated the rumble strips as a factor in the accident. There were also no visible indications of rider correction or overcorrection in 40 hours of roadside observations. Controlled conditions on a closed circuit supported this observation through 32 riders in all types of cycles and experience levels from 0 to 41 years of street riding. Interviews confirmed that the riders had no difficulty or concern with the rumble strips. The recommendation from this study is that cyclist should become familiar with the rumble strips in rider safety courses and driving examinations. There were no indications to impede the installation of rumble strips and no indication that signage is justified.
Download or read book Centerline Rumble Strips written by Eugene Russell and published by Transportation Research Board. This book was released on 2005 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 339: Centerline Rumble Strips (CLRS) examines current design, installation, configuration, dimension, and visibility issues associated with CLRS. The report addresses the need for guidance on warrants, benefits, successful practices, and concerns such as external noise and the reduced visibility of centerline striping material. Also addressed are pavement deterioration, ice buildup in the grooves, adverse impact on emergency vehicles, and the effect of CLRS on bicyclists. Particular attention was paid to available before-and-after CLRS installation crash data to document the safety aspects of CLRS and the availability of policies, guidelines, warrants, and costs regarding their use and design.
Download or read book Safety Impact Study of Centerline Rumble Strips in Georgia written by Jerome Ga Nok Sin and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the last decade, centerline rumble strips have become increasingly prevalent as a safety countermeasure on undivided roadways throughout the United States. Within the state of Georgia, nearly 200 miles of centerline rumble strips have been installed in an effort to address the severity and frequency of crashes involving the centerline. With several thousands of miles of new installations throughout the nation in the last decade, much literature on this subject is still being amassed. This paper will compile and summarize existing literature in order to provide a thorough overview of the latest information from around the United States regarding the safety, usage, and impacts of centerline rumble strips. Furthermore, this paper seeks to comprehensively determine the safety impacts of centerline rumble strips on undivided, rural highway facilities in the state of Georgia. This portion of the study will prepare an updated inventory of centerline rumble strip installations in Georgia and perform a before-after study using three methods: a direct before-after analysis, a comparison before-after analysis, and a comparative analysis. These analyses will incorporate data from crash databases, police records, and traffic records to produce results unique to Georgia. Lastly, this paper will determine the current status of centerline rumble strips and the potential short- and long-term safety, physical, and unintended effects of centerline rumble strips both in the state of Georgia and throughout the United States through a survey sent to all fifty state transportation agencies. Through literature compilation, safety analyses, and findings on the effects of centerline rumble strips, this paper will aid in the future of centerline rumble strips within Georgia and the United States.
Download or read book Crash Impact of Smooth Lane Narrowing with Rumble Strips at Two lane Stop controlled Intersections written by and published by . This book was released on 2010 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NCHRP Report 641 written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Expecting Adam written by Martha Beck and published by Harmony. This book was released on 2011-08-02 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: NEW YORK TIMES BESTSELLER • A candid and moving memoir of how one woman’s pregnancy forced her to confront her definition of how to live a successful life “Slyly ironic, frequently hilarious, [Martha] Beck’s memoir charts the journey from being smart to becoming wise.”—Time This edition includes a new afterword about Adam. From the moment Martha and her husband, John, accidentally conceived their second child, all hell broke loose. They were a couple obsessed with success. After years of matching IQs and test scores with less driven peers, they had two Harvard degrees apiece and were gunning for more. They’d plotted out a future in the most vaunted ivory tower of academe. But when their unborn son, Adam, was diagnosed with Down syndrome, doctors, advisers, and friends in the Harvard community warned them that if they decided to keep the baby, they would lose all hope of achieving their carefully crafted goals. Fortunately, that’s exactly what happened. By the time Adam was born, Martha and John were propelled into a world in which they were forced to redefine everything of value to them, put all their faith in miracles, and trust that they could fly without a net. And it worked. Expecting Adam captures the abject terror and exhilarating freedom of facing impending parenthood, being forced to question one’s deepest beliefs, and rewriting life’s rules.
Download or read book Long term Pavement Marking Practices written by James Migletz and published by Transportation Research Board. This book was released on 2002 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 306: Long-Term Pavement Marking Practices documents the current and best practices for managing pavement marking systems, identifies future needs, and addresses driver needs and methods of communicating information to drivers, selection criteria (e.g., reflectivity, pavement service life, wet weather performance), materials (e.g., color, durability, cost), specifications, construction practices, inventory management systems, and more.
Download or read book Traffic written by Tom Vanderbilt and published by Vintage Canada. This book was released on 2009-08-11 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Driving is a fact of life. We are all spending more and more time on the road, and traffic is an issue we face everyday. This book will make you think about it in a whole new light. We have always had a passion for cars and driving. Now Traffic offers us an exceptionally rich understanding of that passion. Vanderbilt explains why traffic jams form, outlines the unintended consequences of our attempts to engineer safety and even identifies the most common mistakes drivers make in parking lots. Based on exhaustive research and interviews with driving experts and traffic officials around the globe, Traffic gets under the hood of the quotidian activity of driving to uncover the surprisingly complex web of physical, psychological and technical factors that explain how traffic works.
Download or read book Impact of Center Line Rumble Strips and Shoulder Rumble Strips on All Roadway Departure Crashes in Louisiana Two lane Highways written by Xiaoduan Sun and published by . This book was released on 2021 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of Shoulder Rumble Strips in Montana written by Robert R. Marvin and published by . This book was released on 2003 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: An evaluation of shoulder rumble strip's effectiveness in reducing off-road and rollover crashes on Montana's highway system utilized 10 years of crash data on 393 miles of Interstate Highways and 213 miles of National Highway System (NHS) and Primary Highways. Statistical analysis of crash data involved rumble strip segments and control segments without rumble strips for 3 year periods before and after implementation of shoulder rumble strips. Descriptive statistics were developed from global data sets and comparative statistics on equivalent segments produced a finding of significant crash reductions on Interstate Highways, while the effect of shoulder rumble strips on NHS and Primary Highways was uncertain due to an inadequate sample size. Analysis of contingency tables indicate that the reduction in Interstate off-road crash rates attributable to shoulder rumble strips was 14.0% with a corresponding reduction of 23.5% in severity rates. The benefit/cost ratio for construction of shoulder rumble strips on Interstate highways was 19.5. A shoulder rumble strip driver survey involving questions related to knowledge of rumble strips, frequency of encounters, reaction to exposure, and general opinions on their use was incorporated as part of the study. The survey indicated that 95% of the driving public was familiar with rumble strips and their use with the majority of drivers encountering rumble strips on every highway trip. The overwhelming majority of motorists liked the benefits that shoulder rumble strips provide.
Download or read book Rumble Strips for Roads with Narrow Or Non existent Shoulders written by Lily Elefteriadou and published by . This book was released on 2001 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rumble Strip written by Woodrow Phoenix and published by Myriad Editions. This book was released on 2015-09-22 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a powerful and darkly humorous graphic polemic by a leading British comi artist that investigates our increasingly dangerous relationship with cars. If you want to get away with murder, buy a car. Combining autobiography, statisti, case histories, advertising and reportage, Woodrow Phoenix draws a compelling picture of the warped psychology behind our need for speed.
Download or read book Investigating Safety Impact of Center Line Rumble Strips Lane Conversion Roundabout and J turn Features on Louisiana Highways written by Xiaoduan Sun and published by . This book was released on 2019 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past several years, Louisiana has installed quite a few relatively new crash countermeasures, such as center line rumble strips (CLRS) on rural two-lane highways, restriping four-lane undivided roadways to three-lane or five-lane roadways with center lane for left turns, restricting median openings on high speed corridors (RCUT), and roundabouts. Evaluating the effectiveness of these crash countermeasures is crucial for the state highway safety improvement programs. According to the results of this study, these four countermeasures are generally cost-effective and successful in reducing crashes, particularly severe crashes. Estimated crash modification factors (CMFs) for total crashes are 0.83 for CLRS by the Empirical Bayes (EB) method. The CMF for the lane conversion to three and five-lane highways are 0.61 and 0.70 by EB method for segment, and 0.69 and 0.76 by Improved Prediction Method for segment plus intersection. The CMF for RCUT is 0.86 and 0.69 by Improved Prediction Method for RCUT section and intersection only. The CMF for RCUT intersection only is 0.80 by EB method. The CMF for roundabout with stop-sign on minor street (without layout change) is 0.32 and 0.28 by Improved Prediction and EB method. Except roundabout, the ratio of benefit to cost (B/C) is bigger or much bigger than one. Being the most expensive countermeasure, the B/C ratio of roundabout is less than one, but that estimation did not count the benefit from the improved traffic flow performance (reduced delay or saving in travel time) and long-time safety benefits (only three after years).
Download or read book Commercial Motor Vehicle Driver Fatigue Long Term Health and Highway Safety written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-09-12 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are approximately 4,000 fatalities in crashes involving trucks and buses in the United States each year. Though estimates are wide-ranging, possibly 10 to 20 percent of these crashes might have involved fatigued drivers. The stresses associated with their particular jobs (irregular schedules, etc.) and the lifestyle that many truck and bus drivers lead, puts them at substantial risk for insufficient sleep and for developing short- and long-term health problems. Commercial Motor Vehicle Driver Fatigue, Long-Term Health and Highway Safety assesses the state of knowledge about the relationship of such factors as hours of driving, hours on duty, and periods of rest to the fatigue experienced by truck and bus drivers while driving and the implications for the safe operation of their vehicles. This report evaluates the relationship of these factors to drivers' health over the longer term, and identifies improvements in data and research methods that can lead to better understanding in both areas.
