Incremental Improvements to Rural Two-lane Highways PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Incremental Improvements to Rural Two-lane Highways PDF full book. Access full book title Incremental Improvements to Rural Two-lane Highways by J. L. Gattis. Download full books in PDF and EPUB format.
Author: J. L. Gattis Publisher: ISBN: Category : Low-volume roads Languages : en Pages : 84
Book Description
The objective of this research was to examine certain aspects of passing lane operations, with a focus on 3-lane alternate passing designs in Arkansas. Aspects examined included effects of passing lane length on speed, effects of passing lane length on platooning, effects of passing lane length on passing, and crash histories of transitions and passing lanes. Five sets of field data were collected at four rural sites. Speed patterns were found to vary among sites. Platooning decreased after entering the passing lane, and eventually stabilized. Passing activity was greatest at the beginning of the segments. Five years of crash data were utilized. Even though the passing lane segment volumes were higher than the state average rural two-lane road volume, the passing lane crash rates were lower than the statewide average crash rate on rural two-lane roads. Sample size restrictions limited the information found about transition zones. The crash rates at the entering taper were less than at the ending taper.
Author: J. L. Gattis Publisher: ISBN: Category : Low-volume roads Languages : en Pages : 84
Book Description
The objective of this research was to examine certain aspects of passing lane operations, with a focus on 3-lane alternate passing designs in Arkansas. Aspects examined included effects of passing lane length on speed, effects of passing lane length on platooning, effects of passing lane length on passing, and crash histories of transitions and passing lanes. Five sets of field data were collected at four rural sites. Speed patterns were found to vary among sites. Platooning decreased after entering the passing lane, and eventually stabilized. Passing activity was greatest at the beginning of the segments. Five years of crash data were utilized. Even though the passing lane segment volumes were higher than the state average rural two-lane road volume, the passing lane crash rates were lower than the statewide average crash rate on rural two-lane roads. Sample size restrictions limited the information found about transition zones. The crash rates at the entering taper were less than at the ending taper.
Author: Charles V. Zegeer Publisher: ISBN: Category : Highway engineering Languages : en Pages : 104
Book Description
This guide presents information for estimating the costs and safety benefits which would be expected due to various improvements on specific sections of rural, two-lane roads. Such improvements covered in this guide include lane widening, shoulder widening, shoulder surfacing, sideslope flattening, and roadside improvements. This guide will be useful to those involved with the design of 3R-type projects, particularly for improvement projects which will be constructed on existing vertical and horizontal alignment and within the existing right-of-way. The accident relationships with roadway geometrics and cost data contained in this guide resulted from research conducted for the Federal Highway Administration. FHWA research report FHWA/RD-87/008 entitled "Safety Effects of Cross-Section Design for Two-Lane Roads, Volume I, Final Report" contains the major results and conclusions of the study. FHWA research report number FHWA/RD-87/009 subtitled "Volume II, Appendixes" contains details on the data base and the data analysis
Author: Clarkson Hill Oglesby Publisher: ISBN: Category : Technology & Engineering Languages : en Pages : 112
Book Description
he objective of this study is to examine prevailing rural design standards to determine their economic justification. This would evaluate in depth the cost of some of the most significant design practices (for example, roadway and shoulder width and surfacing type). Resulting user benefits, such as operating, accident and time savings would be weighed against the cost of individual features. In addition to the analysis of the user-benefit relationships, the economic and social consequences to local residents, businesses and communities should be studied and a suitable means of including them in the reckoning of warranted levels of improvement should be found.
Author: J. L. Gattis
Author: J. L. Gattis
Author: 
Author: R. F. Benekohal
Author: 
Author: Charles V. Zegeer
Author: Charles V. Zegeer
Author: Hugh W. McGee
Author: Charles V. Zegeer
Author: 
Author: Clarkson Hill Oglesby