Serious injuries and fatalities resulting from falls from heights are a major concern in construction work. In 2015, Ontario’s Ministry of Labour implemented regulations defining working-at-heights (WAH) training program standards and establishing a program for approving training providers in the province. A team at the Institute for Work & Health conducted a study to evaluate the reach of the training initiative and examine the effectiveness of the training standard in reducing the risk of falls from heights. Data collected included surveys, administrative data and in-depth interviews with training providers, trainees, employers and labour inspectors. In this presentation, Dr. Lynda Robson shares findings from that study.