Single vehicle "run-of-road" crashes are a significant problem on CAREC roads. They are particularly severe and can occur anywhere and at any time. Identifying, investigating, and treating roadside hazards are significant road safety challenges along CAREC highways. This third manual in the series provides practical information about roadside hazard management for CAREC countries. It uses a roadside hazard management strategy and the clear zone concept to explain how CAREC road authorities can: (i) identify roadside hazards, (ii) investigate how best to treat those roadside hazards, and (iii) implement effective safety improvements. The manual explains the three groups of safety barriers and offers options for safer roadside furniture.