Download or read book The Development of Crash Modification Factors written by Eric Donnell and published by . This book was released on 2020 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The transportation-engineering community is transforming by integrating quantitative methods into the task development process. This report identifies opportunities to better understand the relationships between road safety and factors that affect traffic-crash occurrence and severity. In this report, current statistical-analysis methods and data sources used in road-safety research are compared with alternative methods and data sources. Causal inference methods are compared to observational before–after methods to develop safety-effect estimates of centerline and edgeline rumble strips. Regression trees and Random ForestsTM are compared to count regression methods to predict crash frequencies on freeways. Road-safety performance estimates using the Crash Outcomes Data Evaluation System are also discussed, with a focus on opportunities to link hospital and crash data to understand the relationship between crashes and site-specific contributing factors. Methods to account for underreporting in crash-frequency models are also described.
Download or read book Development of Crash Modification Factors for Uncontrolled Pedestrian Crossing Treatments written by Charles V. Zegeer and published by . This book was released on 2017 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Research Program (NCHRP) Report 841: Development of Crash Modification Factors for Uncontrolled Pedestrian Crossing Treatments quantifies the safety benefits of four types of pedestrian crossing treatments—rectangular rapid flashing beacons, pedestrian hybrid beacons, pedestrian refuge islands, and advanced YIELD or STOP markings and signs—and presents a crash modification factor (CMF) for each treatment type. This information, which is suitable for inclusion in the American Association of State Highway and Transportation Officials (AASHTO) Highway Safety Manual, the U.S. Federal Highway Administration's (FHWA's) CMF Clearinghouse, and other guidance, will be valuable to transportation agencies in choosing the appropriate crossing treatment for uncontrolled pedestrian crossings." - Publisher description
Download or read book Crash Modification Factors in Practice written by and published by . This book was released on 2013 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guidelines for the Development and Application of Crash Modification Factors written by Daniel Lance Carter and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crash modification factors (CMF) provide transportation professionals with the kind of quantitative information they need to make decisions on where best to invest limited safety funds.
Download or read book Methodology for the Development and Inclusion of Crash Modification Factors in the First Edition of the Highway Safety Manual written by Geni Behar and published by . This book was released on 2010 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the literature review procedure and inclusion process related to development of Part D-Crash Modification Factors of the Highway Safety Manual (HSM), which is expected to be released later in 2010. The development of Part D of the HSM required a systematic procedure to review, document, and filter the large mass of safety information published in the past several decades.
Download or read book Accident Modification Factors for Traffic Engineering and ITS Improvements written by David L. Harkey and published by Transportation Research Board. This book was released on 2008 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB¿s National Cooperative Highway Research Program (NCHRP) Report 617: Accident Modification Factors for Traffic Engineering and ITS Improvements explores the development of accident modification factors (AMFs) for traffic engineering and intelligent transportation system improvements. AMFs, also known as crash reduction factors, are designed to provide a simple and quick way of estimating the safety impacts of various types of engineering improvements, encompassing the areas of signing, alignment, channelization, and other traffic engineering solutions.
Download or read book Exploration and Development of Crash Modification Factors and Functions for Single and Multiple Treatments written by Juneyoung Park and published by . This book was released on 2015 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, the CMFs and CMFunctions are estimated for various single and combination of treatments for different roadway types (e.g. rural two-lane, rural multi-lane roadways, urban arterials, freeways, etc.) as below: [bullet] Treatments for mainline of roadway: [bullet] adding a thru lane, conversion of 4-lane undivided roadways to 3-lane with two-way left turn lane (TWLTL) [bullet] Treatments for roadway shoulder: [bullet] installing shoulder rumble strips, widening shoulder width, adding bike lanes, changing bike lane width, installing roadside barriers [bullet] Treatments related to roadside features: [bullet] decrease density of driveways, decrease density of roadside poles, increase distance to roadside poles, increase distance to trees Expected contributions of this study are to 1) suggest approaches to estimate more reliable safety effects of multiple treatments, 2) propose methodologies to develop CMFunctions to assess the variation of CMFs with different characteristics among treated sites, and 3) recommend applications of using GNM and MARS to simultaneously consider the interaction impact of more than one variables and nonlinearity of predictors. Finally, potential relevant applications beyond the scope of this research but worth investigation in the future are discussed in this dissertation.
Download or read book A Guide to Developing Quality Crash Modification Factors written by Frank Gross and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing Crash Modification Factors for Variable Speed written by and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crash Modification Factors in Practice written by and published by . This book was released on 2013 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Safety Performance Functions SPF and Crash Modification Factors CMF for Rural Local Roads in Alabama written by Grace Paola Toledo Nieto and published by . This book was released on 2017 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crash Modification Factors in Practice written by and published by . This book was released on 2013 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Crash Modification Factors for Bridge Rail Improvements written by Robert Tyler Fields and published by . This book was released on 2015 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge components such as bridge railings are safety features designed to protect drivers. The guidelines for those safety features have recently been updated to accommodate for the increase in vehicle size. One method to bring non-conforming bridges up to current standards is retrofitting. The objective of this research is to determine the safety effectiveness of retrofitted bridges that have been updated to current standards. Bridge data and bridge related crash data from historical data for Alabama were collected. The data was cleaned and processed in a geographic information system. The remaining data was used in the development of Safety Performance Functions (SPFs) and Crash Modification Factors (CMFs). The SPFs used in this study were developed to predict crash frequency and severity in future years based on roadway and geometric characteristics. The SPFs for general crashes were developed using Negative Binomial. The SPFs for severity of single vehicle crashes were developed using both Negative Binomial and Conway-Maxwell-Poisson. The SPFs used in this study were developed in a connected study and used in this study as part of the CMF development. After obtaining the various prediction models for general crashes and for single vehicle severity crashes, the research utilized the information obtained from them in the development of the CMFs. This research employed the empirical Bayes (EB) before-after approach to develop the CMFs. The CMFs were a measure of effectiveness for retrofitting bridge railings to meet current standards. CMFs were determined for both the general crash and for severity of single vehicle crashes. The findings of this research were that retrofitting bridges to conform to the current standards results in a reduction in crashes and a reduction in the severity of crashes. The findings of this research can aid in the decision making process involving bridge railing improvements.
Download or read book Introduction to Crash Modification Factors written by and published by . This book was released on 2013 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crash Modification Factor Recommendation List written by Reginald R. Souleyrette and published by . This book was released on 2020 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 7th International Conference on Architecture Materials and Construction written by Paulo Mendonça and published by Springer Nature. This book was released on 2022-02-01 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the proceedings of the 7th International Conference on Architecture, Materials and Construction (ICAMC), held in Lisbon, Portugal on October 27-29, 2021. ICAMC serves as an international forum for the presentation of the latest technological advances and research results in the fields of architecture and urban planning, civil and structural engineering, and materials manufacturing and processing. As such, it explores highly diverse topics, including innovative construction technologies (computer and digital manufacturing) and materials (polymers, composites, etc.); traditional materials (glass, wood, steel, concrete, stone, brick, etc.) and its harmonic combination which can be achieved by evaluating their structural and non-structural properties; the key concepts of efficiency and sustainability related to the architectural design and engineering of new buildings; analysis, rehabilitation and restoration of buildings. The contributions, which were selected by means of a rigorous international peer-review process, highlight numerous exciting ideas that will spur novel research directions and foster multidisciplinary collaborations.
Download or read book NCHRP Report 617 written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
