Safety Evaluation of Horizontal Curve Realignment on Rural, Two-Lane Roads (Full and TECHNBRIEF)
This study evaluates the safety effectiveness of horizontal curve realignment by increasing the radius of curved roadway segments on two-lane rural roads. One objective of this strategy is to reduce lane departure crashes, especially run-off-roads crashes. The evaluation results showed substantial and significant reduction in crashes (total, injury and fatal crashes, run-off-road, and fixed object crashes, dark crashes, and wet-road crashes). The economic analysis revealed that increasing the radius of a horizontally curved roadway segment on two-lane rural roads is a cost-effective safety improvement for reducing all types of crashes.