Ontario MTO Truck Knowledge Practice Test 2026 - Free Truck Knowledge Practice Questions and Study Guide

A major cause of vehicle rollover for trucks is excessive speed while taking curves or turns. When a truck travels too quickly into a curve, the forces acting on the vehicle can exceed its stability threshold, leading to a loss of control and potentially causing it to tip over. Trucks have a high center of gravity and a significant amount of weight, which makes them particularly susceptible to rolling over under these conditions.

Navigating curves at safe speeds is critical for maintaining control, as it allows the driver to manage the balance of the vehicle, ensuring that all wheels maintain contact with the ground. Therefore, adhering to recommended speed limits for turns is essential in preventing rollovers and ensuring safety on the roads.

Other factors like driving on smooth surfaces, improper tire inflation, or lack of cargo weight can affect truck performance, but they are not the primary contributors to rollover incidents compared to the critical factor of speed and steering dynamics during turns.