Safety Evaluation of Edge Line Rumble Strips (ELRSs) on Rural, Two-Lane Horizontal Curves (Full and TECHBRIEF)
This study evaluated application of edge-line rumble strips (ELRSs) on rural two-lane horizontal curves. ELRSs are a variation of common shoulder rumble strips used to alert drowsy or distracted drivers when they are leaving the travel lane to the right. ELRSs are installed with the edge-line pavement marking placed directly over the rumble strip. Data were obtained at treated rural two-lane horizontal curves in Kentucky and Ohio. The results for Kentucky indicate statistically significant reductions for total, injury, run-off-road (ROR), and nighttime crashes. The results for Ohio indicate statistically significant reductions for all crash types (i.e., total, injury, ROR, nighttime, and nighttime ROR). The B/C analysis results suggest that this treatment can be highly cost-effective.