Look for the hard facts on how transit operators are physically destroyed by the constant vibration, bumps in the road transmitted up through their spinal columns through harsh suspensions in the buses, irregular work times, schedules too tight to drive on time and passengers who don't hesitate to threaten and harass them mercilessly when late, inadequate breaks to urinate, defecate, eat or just close their eyes for a moment. Many limit water and food intake to avoid needing to use the filthy or non-existent bathrooms. "But they're fat!" you may say. Well look up chronic high stress and the weight gain it can cause via the chemicals your body produces in response. Go Find the data - it's a known fact the job destroys people physically.