A major cause of fatal crashes is driving too fast. This safety training video shows professional truck drivers why they should adjust their speed under different conditions such as poor visibility, curves, and hills. Viewers are shown how much distance it takes to stop based on perception, reaction, and braking time. The course explains why an empty, lighter truck takes longer to stop than a heavy truck filled with cargo. Rules are given for adjusting speed when the roads are wet, icy, or packed with snow. Protect yourself and others by learning how to adjust your driving speed under different conditions.