Enhancing Safety on U-Turn Bridges for Motorcyclists

Abstract

This study aims to prevent motorcycle accidents involving riders falling from U-turn bridges. The primary cause of these accidents is collisions with bridge railings, which are 0.95

-1.10

meters high from the road surface. Such collisions can cause riders to be ejected over the railing and fall below. An analysis of accident data from 2016 to 2025, obtained from the Highway Accident Information Management System (HAIMS), indicates an average of three fatalities per year. The findings led to the development of safety measures for U-turn bridges, including: 1. Installing guardrails on top of the bridge railings 2. Implementing speed reduction markings (Speed Reduction Marking OSB) 3. Installing regulatory and warning signs 4. Incorporating road markings, including U-turn signs, speed limit signs, and directional arrows. 5. Painting concrete barriers (Curb Marking) These measures aim to enhance the safety of motorcyclists and reduce the risk of accidents in the area. Following their implementation, a decrease in accident rates was observed