Publication Details

High-tension cable median barrier safety effectiveness evaluation

Type: Paper

Author(s): Storm, Richard; Srinivasan, Raghavan; Lan, Bo; Klump, Sam; Herring, Rebecca; Wemple, Beth; Saleem, Taha; Schroeder, Whitney

Publisher: Minnesota Department of Transportation


Publication Date: Oct-2022

Number: MN 2022-34

Address: St. Paul, MN

Abstract: The objective of this study was to evaluate the change in crash frequency or severity of varying lateral offsetdistances of high-tension cable median barriers in Minnesota. Crash and traffic data from 2016 to present wereconjoined with roadway cross-sectional data and high-tension cable barrier locations to perform cross-sectionalanalyses for interstate segments equal to or greater than 0.05-miles long. Negative binomial regression modelswere estimated and used to develop crash modification factors (CMFs) for the following crash types: totalcrashes, 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.