Author:
Publisher:
ISBN:
Category : Median strips
Languages : en
Pages : 82
Book Description
Development of Guidelines for Cable Median Barrier Systems in Texas
Author: Scott Allen Cooner
Publisher:
ISBN:
Category : Cables
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Cables
Languages : en
Pages :
Book Description
Report on the Advisability of Expanding the Use of Cable Median Barrier in Illinois
Evaluation of Safety Effectiveness of Median Cable Barriers Installed on Freeways in Ohio
Author: Mohammad Almothaffar
Publisher:
ISBN:
Category : Accidents
Languages : en
Pages : 60
Book Description
The Ohio Department of Transportation (ODOT) began installing median cable barriers in 2003 along highway medians for all roadways that were narrower than 59 ft. The central goal of this work was to prevent cross-median crashes (CMCs) that raised a concern due to their frequencies and severe injuries they caused when they occurred. Cross-median crashes occur when a vehicle leaves its travel way, enters or crosses the dividing median, and collides with vehicles moving in the opposite direction. This study received data from 41 locations totaling about 201 miles of installed median cable barriers in the years 2009-2014. These locations experienced 2,498 median related crashes before and after installation. The study involved a review of police reports to identify target crashes and the manner in which the vehicles hit or crossed the cable barriers, either by penetrating the cables, over-riding, under-riding, stopped, or redirected. A detailed analysis of cable hits was also conducted. The study found that median cable barriers were effective in stopping vehicles from breaching the barrier; 95.4 percent of all cable median barrier crashes had no penetration of the cable barrier, i.e., the vehicles where stopped or bounced by the cables. This thesis study summarizes some key findings of safety effectiveness evaluation of the median cable barriers in Ohio. The findings of overall statewide crash reduction after the median cable barriers compared to before period are based on the safety effectiveness percentages computed by Empirical Bayes (EB) before-after study method using the Highway Safety Manual's (HSM) procedures. Safety effectiveness of Ohio's statewide cable barriers was found to be 73.9 percent for total crashes, 80.4 percent for fatal and injury (FI) crashes combined and 80.1 percent for fatal, incapacitating, and non-incapacitating injury (KAB) crashes combined. Therefore, the estimated crash modification factors (CMFs) for median cable barriers installed in Ohio's Interstate system for total, FI, and KAB crashes are 0.261, 0.196, and 0.199, respectively. Overall, the evaluation results show that the median cable barriers installed in Ohio's Interstate system are effective in reducing cross-median severe injury crashes, which was the main objective of ODOT's installing median barriers in their Interstate highway system.
Publisher:
ISBN:
Category : Accidents
Languages : en
Pages : 60
Book Description
The Ohio Department of Transportation (ODOT) began installing median cable barriers in 2003 along highway medians for all roadways that were narrower than 59 ft. The central goal of this work was to prevent cross-median crashes (CMCs) that raised a concern due to their frequencies and severe injuries they caused when they occurred. Cross-median crashes occur when a vehicle leaves its travel way, enters or crosses the dividing median, and collides with vehicles moving in the opposite direction. This study received data from 41 locations totaling about 201 miles of installed median cable barriers in the years 2009-2014. These locations experienced 2,498 median related crashes before and after installation. The study involved a review of police reports to identify target crashes and the manner in which the vehicles hit or crossed the cable barriers, either by penetrating the cables, over-riding, under-riding, stopped, or redirected. A detailed analysis of cable hits was also conducted. The study found that median cable barriers were effective in stopping vehicles from breaching the barrier; 95.4 percent of all cable median barrier crashes had no penetration of the cable barrier, i.e., the vehicles where stopped or bounced by the cables. This thesis study summarizes some key findings of safety effectiveness evaluation of the median cable barriers in Ohio. The findings of overall statewide crash reduction after the median cable barriers compared to before period are based on the safety effectiveness percentages computed by Empirical Bayes (EB) before-after study method using the Highway Safety Manual's (HSM) procedures. Safety effectiveness of Ohio's statewide cable barriers was found to be 73.9 percent for total crashes, 80.4 percent for fatal and injury (FI) crashes combined and 80.1 percent for fatal, incapacitating, and non-incapacitating injury (KAB) crashes combined. Therefore, the estimated crash modification factors (CMFs) for median cable barriers installed in Ohio's Interstate system for total, FI, and KAB crashes are 0.261, 0.196, and 0.199, respectively. Overall, the evaluation results show that the median cable barriers installed in Ohio's Interstate system are effective in reducing cross-median severe injury crashes, which was the main objective of ODOT's installing median barriers in their Interstate highway system.
High Tension Cable Median Barrier Safety Effectiveness Evaluation
Author: Richard Storm
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
The objective of this study was to evaluate the change in crash frequency or severity of varying lateral offset distances of high-tension cable median barriers in Minnesota. Crash and traffic data from 2016 to present were conjoined with roadway cross-sectional data and high-tension cable barrier locations to perform cross-sectional analyses for interstate segments equal to or greater than 0.05-miles long. Negative binomial regression models were estimated and used to develop crash modification factors (CMFs) for the following crash types: total crashes, target crashes, and barrier crashes. In addition to evaluating the impact of lateral offset, a naïve before-after evaluation was completed to quantify the impact of installing high-tension cable barrier.
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
The objective of this study was to evaluate the change in crash frequency or severity of varying lateral offset distances of high-tension cable median barriers in Minnesota. Crash and traffic data from 2016 to present were conjoined with roadway cross-sectional data and high-tension cable barrier locations to perform cross-sectional analyses for interstate segments equal to or greater than 0.05-miles long. Negative binomial regression models were estimated and used to develop crash modification factors (CMFs) for the following crash types: total crashes, target crashes, and barrier crashes. In addition to evaluating the impact of lateral offset, a naïve before-after evaluation was completed to quantify the impact of installing high-tension cable barrier.
High Tension Cable Median Barrier
Author: Juan C. Medina
Publisher:
ISBN:
Category : Median strips
Languages : en
Pages : 138
Book Description
Publisher:
ISBN:
Category : Median strips
Languages : en
Pages : 138
Book Description
Use of Three-strand Cable Barrier as a Median Barrier
Design and Evaluation of a Low-tension Cable Median Barrier System
Improving Highway Safety
Cable Median Barrier Guidelines
Author: Dean Sicking
Publisher:
ISBN:
Category : Express highways
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category : Express highways
Languages : en
Pages : 0
Book Description