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Author : Subasish Das
Publisher :
ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (798 download)
Download or read book Evaluating Safety Improvement from Edge Lines on Rural Two-lane Highways written by Subasish Das and published by . This book was released on 2012 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xiaoduan Sun
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (793 download)
Download or read book Safety Improvement from Edge Lines on Rural Two-lane Highways (with Three-years Before and One-year After Crash Data Analysis) written by Xiaoduan Sun and published by . This book was released on 2012 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nicholas Michael Warrenchuk
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (95 download)
Download or read book Safety Impacts of Edge Lines on Texas Rural Two-lane Roadways written by Nicholas Michael Warrenchuk and published by . This book was released on 2006 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Roadway crashes are a detriment to our society, so improvements in roadway safety that reduce crashes are of extreme importance. Though it is clear that crashes on our highways are a drain both socially and economically, the contribution of roadway safety to overall community safety is difficult to quantify and has seen many approaches. The study first defines highway safety as a whole, and then focuses on safety improvements on rural two-lane roadways. One such improvement, highway edge lines, may be especially beneficial on such highways. A literature review indicated that edge lines may have a tendency to reduce accident experience on rural, two-lane roads and may affect vehicle speed and lateral position in the lane, which in turn may increase or decrease accident likelihood. After compilation of a database of rural, two-lane roadways in Texas, an accident analysis comparing such roadways with and without edge lines was performed. In addition to general accident frequency analysis taking into account varying traffic lane and shoulder widths and roadway curvature, factors such as accident type, intersection presence, light condition, surface condition, crash-supporting factors, severity, driver age, and driver gender were considered. Further, stationary roadside observations measuring vehicle speed and lateral position were taken during daylight and darkness on three rural, two-lane roadway test sites first without edge lines, and then again after the sites were striped with edge lines. Overall, the accident analysis showed that edge line treatments on rural two-lane roadways may reduce accident frequency, especially run-off-the road frequency, with the highest impact on curves and narrow roadways. The stationary observation analysis indicated some tendency of edge lines to increase vehicle speeds and also decrease speed variations, while moving vehicles toward the pavement edge on narrow roadways, especially at night.
Author : Alexei R. Tsyganov
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (1 download)
Download or read book Safety Impact of Edge Lines on Rural Two-lane Highways written by Alexei R. Tsyganov and published by . This book was released on 2005 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xiaoduan Sun
Publisher :
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.:/5 (1 download)
Download or read book Impact of Edge Lines on Safety of Rural Two-lane Highways written by Xiaoduan Sun and published by . This book was released on 2005 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study compiled an inventory of rural two-lane highways under the operation of the Texas Department of Transportation (TxDOT), investigated typical dimensions and characteristics of such roadways, and utilized this information to perform a detailed accident statistic analysis. Crash statistics comparisons were made for highways with and without edge lines. In addition to general accident frequency analysis, varying traffic lane and shoulder widths, and roadway curvature, factors such as accident type, intersection presence, light condition, surface condition, crash-supporting factors, severity, driver age, and driver gender were considered.
Author : Vijaya R. Kakaraparthy
Publisher :
ISBN 13 :
Total Pages : 74 pages
Book Rating : 4.:/5 (557 download)
Download or read book Safety Impact of Edge Lines on Narrow Rural Two-lane Highways written by Vijaya R. Kakaraparthy and published by . This book was released on 2009 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Benjamin H. Cottrell
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.3/5 (555 download)
Download or read book Evaluation of Wide Edgelines on Two-lane Rural Roads written by Benjamin H. Cottrell and published by . This book was released on 1987 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of 8-in. wide edgelines on the incidence of run-off-the road (ROR) and related accidents was evaluated. The treatment locations consisted of three two-lane rural road sections totaling 55.2 miles. A before-and-after design with a comparison group, and a check for comparability were used to analyze data. Five years of accident data, covering the three years before wide edgeline installation and the two years after installation, were used. It was concluded that there is no evidence to indicate that wide edgelines significantly affected the incidence of ROR and related accidents for any individual treatment location or for the locations combined. The related accidents include ROR accidents involving driving under the influence of alcohol or drugs, ROR accidents on curves, ROR accidents during darkness, and opposite-direction accidents. Consequently, it was recommended that wide edgelines not be considered as a countermeasure for ROR accidents in Virginia.
Author : John A. Molino
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.:/5 (772 download)
Download or read book Simulator Evaluation of Low-cost Safety Improvements on Rural Two-lane Undivided Roads written by John A. Molino and published by . This book was released on 2010 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: This experiment was sponsored by the Low Cost Safety Improvements Pooled Fund Study. It focused on two areas: (1) advanced detection and speed reduction for curves in rural two lane roads at night and (2) traffic calming for small rural towns during the day. The experiment was conducted in the Federal Highway Administration (FHWA) Highway Driving Simulator (HDS). Speed reduction in curves yielded the following order of tested treatments (from best to worst): (1) post mounted delineators (PMDs) enhanced by streaming light emitting diode (LED) lights slowed drivers down the most (9 mi/h (14.5 km/h)); (2) standard PMDs slowed drivers down by 7 to 8 mi/h (11.3 to 12.9 km/h); and (3) edge lines slowed drivers down by 2 mi/h (3.2 km/h). The same order was obtained for increases in the distance at which drivers were able to identify either the direction or the severity of the curve ahead as follows: streaming LED PMDs increased detection distance the most (560 to 1,065 ft (171 to 325 m)); standard PMDs increased detection distance by 45 to 200 ft (13.7 to 61 m); and edge lines increased detection distance by zero to 25 ft (zero to 7.6 m). PMDs performed better than pavement markings. The streaming PMDs solution offered the greatest potential increase in recognition distance. Speed reduction in towns yielded the following order of tested treatments: (1) chicanes slowed drivers down the most by 4 to 9 mi/h (6.4 to 14.5 km/h); (2) parked cars on both sides of the road slowed drivers 4 mi/h (6.4 km/h); and (3) bulb outs resulted in only a small speed reduction of 1 mi/h (1.6 km/h) or none at all. In the case of towns, two low cost safety solutions are worthy of further study: (1) adding painted chicanes to town entrances and (2) providing for and encouraging parking in the town. The results of this experiment do not take into account other hazardous factors that exist in the real world. Therefore, field validation is recommended for most of the above findings.
Author :
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.3/5 (555 download)
Download or read book Safety Evaluation of the Safety Edge Treatment written by and published by . This book was released on 2011 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Between periods of maintenance, pavement-edge drop-offs can form along the edge of highways. When a driver runs off the roadway, such drop-offs can hinder reentry and may lead to driver overcorrection, loss of control, or overturning on the roadway or roadside. The safety edge is a treatment that is implemented in conjunction with pavement resurfacing and is intended to help minimize drop-off-related crashes. This report examines the safety effects, costs, and benefits of this low-cost treatment for two-lane and multilane rural highways. The safety research was conducted as an observational before-after evaluation of treated sites using the empirical Bayes method. The economic appraisal consisted of a benefit-cost analysis"--Technical report documentation page.
Author : Scott Himes
Publisher :
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.:/5 (14 download)
Download or read book Safety Evaluation of Edge-line Rumble Stripes on Rural Two-lane Horizontal Curves written by Scott Himes and published by . This book was released on 2017 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical summary of the Federal Highway Administration report about edge line rumble stripes to alert drowsy or distracted drivers when leaving the travel lane.
Author : Xiaoduan Sun
Publisher :
ISBN 13 :
Total Pages : 53 pages
Book Rating : 4.:/5 (882 download)
Download or read book A Comprehensive Study on Pavement Edge Line Implementation written by Xiaoduan Sun and published by . This book was released on 2014 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: The previous 2011 study "Safety Improvement from Edge Lines on Rural Two-Lane Highways" analyzed the crash data of three years before and one year after edge line implementation by using the latest safety analysis statistical method. As an extension of the 2011 project, this study not only used two more years of crash data for the after time period but also applied the Empirical Bayes (EB) method in the analysis to estimate the crash reduction factors. Moreover, crash characteristics analysis is performed in this study to compare the difference before and after edge line implementation. Additionally, this project performed benefit and cost analysis.
Author : Kay Fitzpatrick
Publisher : Transportation Research Board
ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.3/5 (555 download)
Download or read book Accident Mitigation Guide for Congested Rural Two-lane Highways written by Kay Fitzpatrick and published by Transportation Research Board. This book was released on 2000 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. A. Stimpson
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.3/5 (91 download)
Download or read book Field Evaluation of Selected Delineation Treatments on Two-lane Rural Highways written by W. A. Stimpson and published by . This book was released on 1977 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (14 download)
Download or read book Safety evaluation of edge line rumble stripes (ELRSs) on rural, two-lane horizontal curves written by and published by . This book was released on 2017 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Douglas W. Harwood
Publisher :
ISBN 13 :
Total Pages : 204 pages
Book Rating : 4.3/5 (91 download)
Download or read book Prediction of the Expected Safety Performance of Rural Two-lane Highways written by Douglas W. Harwood and published by . This book was released on 2000 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents an algorithm for predicting the safety performance of a rural two-lane highway. The accident prediction algorithm consists of base models and accident modification factors for both roadway segments and at-grade intersections on rural two-lane highways. The base models provide an estimate of the safety performance of a roadway or intersection for a set of assumed nominal or base conditions. The accident modification factors adjust the base model predictions to account for the effects on safety for roadway segments of lane width, shoulder width, shoulder type, horizontal curves, grades, driveway density, two-way left-turn lanes, passing lanes, roadside design and the effects on safety for at-grade intersections of skew angle, traffic control, exclusive left- and right-turn lanes, sight distance, and driveways. The accident prediction algorithm is intended for application by highway agencies to estimate the safety performance of an existing or proposed roadway. The algorithm can be used to compare the anticipated safety performance of two or more geometric alternatives for a proposed highway improvement. The accident prediction algorithm includes a calibration procedure that can be used to adapt the predicted results to the safety conditions encountered by any particular highway agency on rural two-lane highways. The algorithm also includes an Empirical Bayes procedure that can be applied to utilize the safety predictions provided by the algorithm together with actual site-specific accident history data.
Author : Raghavan Srinivasan
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (11 download)
Download or read book Safety Evaluation of Horizontal Curve Realignment on Rural Two-lane Roads written by Raghavan Srinivasan and published by . This book was released on 2017 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical brief on evaluated realignment of horizontal curves on rural two-lane roads based on before-after evaluations to reduce lane departure crashes, especially run-off-road crashes.
Author : Kay Fitzpatrick
Publisher : Transportation Research Board
ISBN 13 : 9780309066242
Total Pages : 176 pages
Book Rating : 4.0/5 (662 download)
Download or read book Accident Mitigation Guide for Congested Rural Two-lane Highways written by Kay Fitzpatrick and published by Transportation Research Board. This book was released on 2000 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
