The Rockfall Hazard Rating System
This system of rating the risk of rockfalls was developed for the Oregon Department of Transportation. The goal behind a comprehensive system for evaluating the risk is to allow the DOT to address the risk in a systematic and proactive way instead of simply responding to incidents retroactively. The report has directions for how any agency can implement their rating systems for rockfall hazards. Although the system addresses just the risk of rockfalls, the general principles behind it can also be extrapolated to any specific risk that a transportation system needs to classify.