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Investigation Of Features Associated With Roadway Departure Crashes On Louisiana Rural Two Lane Highways
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Book Synopsis Investigation of Features Associated with Roadway Departure Crashes on Louisiana Rural Two-lane Highways by : M. Ashifur Rahman
Download or read book Investigation of Features Associated with Roadway Departure Crashes on Louisiana Rural Two-lane Highways written by M. Ashifur Rahman and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigating the Characteristics of Run-off-road Crashes in Rural Two-lane Highways in Louisiana by : Bala Kishore Malla
Download or read book Investigating the Characteristics of Run-off-road Crashes in Rural Two-lane Highways in Louisiana written by Bala Kishore Malla and published by . This book was released on 2006 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impact of Center Line Rumble Strips and Shoulder Rumble Strips on All Roadway Departure Crashes in Louisiana Two-lane Highways by : Xiaoduan Sun
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:
Book Synopsis Investigating Safety Impact of Center Line Rumble Strips, Lane Conversion, Roundabout, and J-turn Features on Louisiana Highways by : Xiaoduan Sun
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).
Book Synopsis Reducing Roadway Departure Crashes at Horizontal Curve Sections on Two-lane Rural Highways by : Eric T. Donnell
Download or read book Reducing Roadway Departure Crashes at Horizontal Curve Sections on Two-lane Rural Highways written by Eric T. Donnell and published by . This book was released on 2019 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interdisciplinary Accident Investigation Project by : Sunbelt Research Corporation
Download or read book Interdisciplinary Accident Investigation Project written by Sunbelt Research Corporation and published by . This book was released on 1979 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigating Safety Effectiveness of Centerline Rumble Strips on Rural Two-lane Roads in Louisiana with Empirical Bayes Method by : Mohammad Ashifur Rahman
Download or read book Investigating Safety Effectiveness of Centerline Rumble Strips on Rural Two-lane Roads in Louisiana with Empirical Bayes Method written by Mohammad Ashifur Rahman and published by . This book was released on 2016 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relationship Between Lane Departure Events and Roadway Characteristics by : Shauna L. Hallmark
Download or read book Relationship Between Lane Departure Events and Roadway Characteristics written by Shauna L. Hallmark and published by . This book was released on 2012 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study will provide better information about the effectiveness of rural roadway safety countermeasures with a focus on lane departures. The main emphasis of the research is to conduct a crash surrogate analysis for common road departure events and develop a model that can be used to predict and mitigate road departures. The purpose of the study covered in this report was to explore use of naturalistic driving study (NDS) data to assess the relationship between roadway and other characteristics and lane departures on rural two-lane roads. Road departure events from an NDS dataset from the University of Michigan Transportation Research Institute (UMTRI) were used to predict the likelihood of a lane departure as influenced by driver, roadway, and environmental factors.
Download or read book Guide for Pavement Friction written by and published by AASHTO. This book was released on 2008 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains guidelines and recommendations for managing and designing for friction on highway pavements. The contents of this report will be of interest to highway materials, construction, pavement management, safety, design, and research engineers, as well as others concerned with the friction and related surface characteristics of highway pavements.
Book Synopsis Evaluating the Application of Safety Performance Prediction Model for Rural Two-lane Segments with Louisiana Crash Data by : Yuebin Li
Download or read book Evaluating the Application of Safety Performance Prediction Model for Rural Two-lane Segments with Louisiana Crash Data written by Yuebin Li and published by . This book was released on 2005 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of Passing Accidents on Two-lane, Two-way Roads by :
Download or read book An Investigation of Passing Accidents on Two-lane, Two-way Roads written by and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Managing Speed written by and published by Transportation Research Board. This book was released on 1998 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB Special Report 254 - Managing Speed: Review of Current Practices for Setting and Enforcing Speed Limits reviews practices for setting and enforcing speed limits on all types of roads and provides guidance to state and local governments on appropriate methods of setting speed limits and related enforcement strategies. Following an executive summary, the report is presented in six chapters and five appendices.
Book Synopsis Identifying Effective Geometric and Traffic Factors to Predict Crashes at Horizontal Curve Sections by : Hojr Momeni
Download or read book Identifying Effective Geometric and Traffic Factors to Predict Crashes at Horizontal Curve Sections written by Hojr Momeni and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Driver workload increases on horizontal curves due to more complicated navigation compared to navigation on straight roadway sections. Although only a small portion of roadways are horizontal curve sections, approximately 25% of all fatal highway crashes occur at horizontal curve sections. According to the Fatality Analysis Reporting System (FARS) database, fatalities associated with horizontal curves were more than 25% during last years from 2008 to 2014, reinforcing that investigation of horizontal curve crashes and corresponding safety improvements are crucial study topics within the field of transportation safety. Improved safety of horizontal curve sections of rural transportation networks can contribute to reduced crash severities and frequencies. Statistical methods can be utilized to develop crash prediction models in order to estimate crashes at horizontal curves and identify contributing factors to crash occurrences, thereby correlating to the primary objectives of this research project. Primary data analysis for 221 randomly selected horizontal curves on undivided two-lane two-way highways with Poisson regression method revealed that annual average daily traffic (AADT), heavy vehicle percentage, degree of curvature, and difference between posted and advisory speeds affect crash occurrence at horizontal curves. The data, however, were relatively overdispersed, so the negative binomial (NB) regression method was utilized. Results indicated that AADT, heavy vehicle percentage, degree of curvature, and long tangent length significantly affect crash occurrence at horizontal curve sections. A new dataset consisted of geometric and traffic data of 5,334 horizontal curves on the entire state transportation network including undivided and divided highways provided by Kansas Department of Transportation (KDOT) Traffic Safety Section as well as crash data from the Kansas Crash and Analysis Reporting System (KCARS) database were used to analyze the single vehicle (SV) crashes. An R software package was used to write a code and combine required information from aforementioned databases and create the dataset for 5,334 horizontal curves on the entire state transportation network. Eighty percent of crashes including 4,267 horizontal curves were randomly selected for data analysis and remaining 20% horizontal curves (1,067 curves) were used for data validation. Since the results of the Poisson regression model showed overdispersion of crash data and many horizontal curves had zero crashes during the study period from 2010 to 2014, NB, zero-inflated Poisson (ZIP), and zero-inflated negative binomial (ZINB) methods were used for data analysis. Total number of crashes and severe crashes were analyzed with the selected methods. Results of data analysis revealed that AADT, heavy vehicle percentage, curve length, degree of curvature, posted speed, difference between posted and advisory speed, and international roughness index influenced single vehicle crashes at 4,267 randomly selected horizontal curves for data analysis. Also, AADT, degree of curvature, heavy vehicle percentage, posted speed, being a divided roadway, difference between posted and advisory speeds, and shoulder width significantly influenced severe crash occurrence at selected horizontal curves. The goodness-of-fit criteria showed that the ZINB model more accurately predicted crash numbers for all crash groups at the selected horizontal curve sections. A total of 1,067 horizontal curves were used for data validation, and the observed and predicted crashes were compared for all crash groups and data analysis methods. Results of data validation showed that ZINB models for total crashes and severe crashes more accurately predicted crashes at horizontal curves. This study also investigated the effect of speed limit change on horizontal curve crashes on K-5 highway in Leavenworth County, Kansas. A statistical t-test proved that crash data from years 2006 to 2012 showed only significant reduction in equivalent property damage only (EPDO) crash rate for adverse weather condition at 5% significance level due to speed limit reduction in June 2009. However, the changes in vehicles speeds after speed limit change and other information such as changes in surface pavement condition were not available. According to the results of data analysis for 221 selected horizontal curves on undivided two-lane highways, tangent section length significantly influenced total number of crashes. Therefore, providing more information about upcoming changes in horizontal alignment of the roadway via doubling up warning sings, using bigger sings, using materials with higher retroreflectivity, or flashing beacons were recommended for horizontal curves with long tangent section lengths and high number of crashes. Also, presence of rumble strips and wider shoulders significantly and negatively influenced severe SV crashes at horizontal curve sections; therefore, implementing rumble strips and widening shoulders for horizontal curves with high number of severe SV crashes were recommended.
Book Synopsis Geometric Design Practices for European Roads by : James O. Brewer
Download or read book Geometric Design Practices for European Roads written by James O. Brewer and published by DIANE Publishing. This book was released on 2001 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Two-lane Rural Roads: Design and Traffic Flow by : Organisation for Economic Co-operation and Development
Download or read book Two-lane Rural Roads: Design and Traffic Flow written by Organisation for Economic Co-operation and Development and published by . This book was released on 1972 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary in French.
Book Synopsis World Report on Road Traffic Injury Prevention by : Marjorie Peden
Download or read book World Report on Road Traffic Injury Prevention written by Marjorie Peden and published by DIANE Publishing. This book was released on 2008-09 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every day thousands of people are killed and injured on our roads. Millions of people each year will spend long weeks in the hospital after severe crashes and many will never be able to live, work or play as they used to do. Current efforts to address road safety are minimal in comparison to this growing human suffering. This report presents a comprehensive overview of what is known about the magnitude, risk factors and impact of road traffic injuries, and about ways to prevent and lessen the impact of road crashes. Over 100 experts, from all continents and different sectors -- including transport, engineering, health, police, education and civil society -- have worked to produce the report. Charts and tables.
Book Synopsis Roadside Safety Analysis Program (RSAP) by : King K. Mak
Download or read book Roadside Safety Analysis Program (RSAP) written by King K. Mak and published by Transportation Research Board. This book was released on 2003 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
