What is the most critical factor in causing rollover accidents?

The most critical factor in causing rollover accidents is the driver. A driver's awareness, decision-making skills, and ability to react to changing conditions directly influence the likelihood of a rollover. Factors like making sharp turns, overcorrecting, or misjudging the load can all lead to losing control of the vehicle, which significantly increases the risk of a rollover.

While road conditions, the vehicle's load, and speed are important factors that contribute to stability and control, they are heavily influenced by the driver's actions. For instance, a skilled driver can adjust their speed or maneuver safely even in poor road conditions or when carrying a heavy load. Thus, effective driver training and awareness are paramount in preventing rollover accidents.