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Author : Georgy Bezkorovainy
Publisher :
ISBN 13 :
Total Pages : 302 pages
Book Rating : 4.:/5 (31 download)
Download or read book Effects of Advisory Speed Limits at Horizontal Curves of Two-lane Rural Highways written by Georgy Bezkorovainy and published by . This book was released on 1964 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. W. Lyles
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.3/5 (555 download)
Download or read book An Evaluation of Warning and Regulatory Signs for Curves on Rural Roads written by R. W. Lyles and published by . This book was released on 1980 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report reviews an experiment undertaken to examine the effectiveness of five sign treatments for controlling driver speeds in the vicinity of hazardous horizontal curves on rural two-lane highways. Signs examined ranged from the standard curve warning arrow to a regulatory speed zone sign in conjunction with a curve warning sign. Data collected during the experiment included both the following electronic and manual data: speeds of motorists as they approached and negotiated two horizontal curves, vehicle classification and registration information, and whether vehicles crossed over center and edge line markings.
Author : Eric T. Donnell
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.:/5 (1 download)
Download or read book Operational Effects of Wide Edge Lines Applied to Horizontal Curves on Two-lane Rural Highways written by Eric T. Donnell and published by . This book was released on 2006 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kushalkumar G. Patel
Publisher :
ISBN 13 : 9781369447002
Total Pages : 65 pages
Book Rating : 4.4/5 (47 download)
Download or read book Effects of Horizontal Curve on Driver's Passing Maneuver Along Two-lane Rural Highways written by Kushalkumar G. Patel and published by . This book was released on 2016 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: Passing maneuvers by drivers on rural two-lane highways consist of many potential crash risks. These maneuvers by drivers are made up of complex decisions such as: judging the speed of the approaching vehicle, interpreting the speed of the oncoming vehicle, and managing travel speed and location while in the opposing lane. When this passing maneuver is influenced by roadway geometric conditions such as horizontal curvature, passing decisions become more complicated as sight distance may be restricted, increasing potential crash risks. This research conducted a laboratory experiment evaluating effects of horizontal curvatures on passing maneuvers. A driving simulator at the University of Idaho was used to develop a virtual scenario of three real-world highway sections in Alaska which currently experiences high crash rates. Twenty-four participant drivers were tested using this virtual scenario. The results suggest the left-hand orientation curves and right-hand orientation curves did not have significant difference in passing maneuvers on these real-world sections. The passing maneuvers were mostly affected by radius of the curves.
Author : National Cooperative Highway Research Program
Publisher : Transportation Research Board
ISBN 13 : 0309087686
Total Pages : 92 pages
Book Rating : 4.3/5 (9 download)
Download or read book Geometric Design Consistency on High-speed Rural Two-lane Roadways written by National Cooperative Highway Research Program and published by Transportation Research Board. This book was released on 2003 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. W. Lyles
Publisher : Transportation Research Board National Research
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.:/5 (1 download)
Download or read book Communicating Changes in Horizontal Alignment written by R. W. Lyles and published by Transportation Research Board National Research. This book was released on 2006 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alberto M. Figueroa-Medina
Publisher :
ISBN 13 : 9781622602469
Total Pages : pages
Book Rating : 4.6/5 (24 download)
Download or read book Reconciling Speed Limits with Design Speeds written by Alberto M. Figueroa-Medina and published by . This book was released on 2004-12-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, context-sensitive highway design has been promoted to ensure that designers consider the environmental, scenic, aesthetic, historic, community, and preservation aspects of the road. Context-sensitive design may lead to situations where the current design standards cannot be met because of restricting local conditions. Indiana has road sections designed and built some time ago. In a considerable number of roads with the statutory limit of 55 mph (90 km/h), the road geometry does not meet the current standards. At individual intersections and on curves, advisory speeds are posted together with warning signs. Although this solution increases the safety of road users and allows for traveling at reasonably high speeds outside of these segments, the final solution is to upgrade their geometry to the desirable level. This report presents models that predict user-selected percentile free-flow speeds on two-lane rural and four-lane rural and suburban highways. The percentile speeds are computed as a linear combination of the mean speed and the standard deviation in panel data models with random effects. The developed percentile speed models involve more design variables than typical speed models, and separate the mean speed factors from the speed dispersion factors. These benefits ease the model interpretation and its use in highway design. The study results should help designers bring the predicted speed to the desired speed as close as possible given the budget constraints. Engineering judgment can then be applied to balance safety and construction cost in highway improvement projects.
Author : Kristin Kersavage
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Relationship Between Speed Metrics and Crash Frequency and Severity written by Kristin Kersavage and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Reducing the number and severity of crashes on highways and streets is of high importance for government officials and transportation professionals in the United States. Substantial research has focused on various speed metrics, such as operating speeds and the posted speed limit, and their relationship to safety, such as crash frequency and crash severity. Crash severity is the safety measure most often linked to measures of speed and is based on dissipation of kinetic energy. However, many aspects of the relationships between speed metrics and crash frequency and risk have yet to be studied in depth, so a complete understanding of speeding-related crashes is unknown. Design speeds are used to establish geometric design criteria, and operating speed results from the geometric design process. Posted speed limits may be established based on operating speeds or by statute. When posted speed limits are inconsistent with design or operating speeds, road safety performance may be affected. A more complete understanding of the relationship between safety performance and operating speeds, posted speed limits, and design speeds may produce rational speed limits and lead to improved safety performance on roadways.This research combined real-time vehicle probe speed data, roadway inventory data, and crash data to assess crash risk and crash frequency.This thesis first determined the risk of a crash on two-lane rural highways based on operating speed metrics, differences between speed metrics, and traffic volume data. Results from the crash risk analysis indicate that operating speeds in 1-minute and 5-minute averages improve the statistical fit and prediction of binary logistic regression models. Higher traffic volumes and operating speeds higher than either the road average speed or road reference speed were associated with increased crash risk. Whereas, variations in travel speeds between vehicles were associated with decreased crash risk. This thesis also analyzed the frequency of crashes on horizontal curve segments of two-lane rural roadways using operating speed data, differences among speed metrics, traffic volume data, roadway inventory data, and crash data. Negative binomial regression models improve the statistical fit and prediction of crash frequency models compared to random-effects negative binomial regression. Generally, increases in the differences between operating speed and road average speed and the differences between operating speed and inferred design were associated with an increase in crash frequency. Increases in the differences between inferred design speed and posted speed limit were also associated with an expected increase in crash frequency; however, increases in the operating speed variance and in the difference between operating speeds and posted speed limit were associated with an expected decrease in crash frequency.
Author : Kay Fitzpatrick
Publisher :
ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.3/5 (91 download)
Download or read book Speed Prediction for Two-lane Rural Highways written by Kay Fitzpatrick and published by . This book was released on 2000 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher : Transportation Research Board
ISBN 13 : 9780309065023
Total Pages : 444 pages
Book Rating : 4.0/5 (65 download)
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.
Author : Gerry John Forbes
Publisher :
ISBN 13 : 9781933452654
Total Pages : 107 pages
Book Rating : 4.4/5 (526 download)
Download or read book Methods and Practices for Setting Speed Limits written by Gerry John Forbes and published by . This book was released on 2012-09-01 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This informational report describes four primary practices and methodologies (engineering approach, expert systems, optimization, and injury minimization) that are used in establishing speed limits. It also reviews the basic legalities of speed limits and presents several case studies for setting speed limits on a variety of roads"--Provided by publisher.
Author :
Publisher :
ISBN 13 :
Total Pages : 51 pages
Book Rating : 4.:/5 (362 download)
Download or read book Tangent Length and Sight Distance Effects on Accident Rates at Horizontal Curves on Two-lane Rural Highways written by and published by . This book was released on 1996 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Surface Transportation
Publisher :
ISBN 13 :
Total Pages : 832 pages
Book Rating : 4.3/5 (121 download)
Download or read book Impact and Implementation of the 55-mile-per-hour Speed Limit written by United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Surface Transportation and published by . This book was released on 1987 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Research Council (U.S.). Highway Research Board
Publisher :
ISBN 13 :
Total Pages : 772 pages
Book Rating : 4.:/5 (89 download)
Download or read book Special Report - Highway Research Board written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1966 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : European Conference of Ministers of Transport
Publisher : OECD Publishing
ISBN 13 : 9282103781
Total Pages : 286 pages
Book Rating : 4.2/5 (821 download)
Download or read book Speed Management written by European Conference of Ministers of Transport and published by OECD Publishing. This book was released on 2006-10-13 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Speeding is the number one road safety problem in a large number of OECD/ECMT countries. It is responsible for around one third of the current, unacceptably high levels of road fatalities. Speeding has an impact not only on accidents but also on the ...
Author : Kay Fitzpatrick
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.3/5 (91 download)
Download or read book Alternative Design Consistency Rating Methods for Two-lane Rural Highways written by Kay Fitzpatrick and published by . This book was released on 2000 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Highway Traffic Safety Administration
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.3/5 (555 download)
Download or read book The Effect of Increased Speed Limits in the Post-NMSL Era written by United States. National Highway Traffic Safety Administration and published by . This book was released on 1998 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
