Evaluation of the effectiveness of centreline rumble strips on rural roads
- Published: Report 2015-07, State of Vermont, Agency of Transportation, 2015
- Authors: Ellis, W.M
- Date Added: 05 Apr 2016
- Last Update: 05 Apr 2016
The study aimed to evaluate the effectiveness of centreline rumble strips in reducing lane departure crashes and improving safety on undivided rural roads.
Two sites in the USA (Mendon-Killington and Sheldon) were used to compare the effectiveness of rumble strips. The study compared the crash rate from the nine years prior to the installation of the rumble strips with the crash rates in the five years following their installation. The model account for potential explanatory factors that could have impacted the crash rates (e.g. weather, time of year).
In both locations the centreline rumble strips were found to have a positive effect on crash reduction.
In the nine years prior to the installation of the rumble strips there were 189 crashes at the Mendon-Killington location, 47.6% of which were head on collisions. After the installation, 77 crashes occurred in five years, 46.7% of which were head on collisions.
The average number of head on crashes per year was reduced from 12.86 to 7.2, a 46% reduction.
There was also a 43% reduction in overall annual crashes.
At the Sheldon location there were 65 crashes prior to the installation of the rumble strips, 32.3% of which were head on collision. After the installation of the rumble strips, 41 crashes 9 of which were head on collisions reflecting at 10.3% reduction in head on crashes overall.
Rumble strips, centreline rumble strips, rural roads, head-on collisions