Specifications include, but are not limited to: 1. Define and quantify the health and safety issues facing public transit workers. These include, but are not limited to, behaviors that affect health and safety (sleep, exercise, diet, smoking, seat belt use, alcohol use), chronic diseases (diabetes, cardio-vascular disease, hearing loss), communicable diseases, labor environment, organizational issues (safety climate, organizational programs, policies and procedures, support at work), organization of work (shiftwork, job discretion, job demands), and access to health-promoting activities and healthcare; 2. Using existing information resources, estimate the costs associated with employee health issues; and characterize to the degree possible how these costs are distributed to individuals, transit agencies, and society; 3. Identify and describe scalable and sustainable strategies successfully implemented in transit agencies; and 4. Identify and evaluate potential methods for measuring cost-benefits and cost-effectiveness of these programs to individuals, transit agencies, and society.