http://www.cdc.gov/niosh/topics/falls/aeriallift.html
Aerial lifts are powered and mobile platforms that are used for elevating workers to various heights, which exposes workers to fall hazards.
Training is necessary for anyone using aerial work platforms and equipment. In an effort to create awareness about common workplace hazards when using aerial lifts, NIOSH has developed educational tools and products. Employers, trainers, safety and health professionals, and aerial lift operators can use the following information to prevent work-related falls.