Which factor is crucial for safe truck operation while turning?

Speed management during the turn is essential for safe truck operation because it helps the driver maintain control of the vehicle and navigate the turn without losing stability. Trucks are larger and heavier than standard vehicles, so their turning radius is significantly greater. Managing speed appropriately allows the driver to make the turn smoothly while minimizing the risk of tipping over or skidding.

When speed is controlled, the truck can respond adequately to any potential hazards or complications that may arise during the turn, such as other vehicles, pedestrians, or unexpected road conditions. Proper speed management also ensures that the trailer stays aligned with the truck, reducing the risk of jackknifing.

In contrast, using only one mirror can limit visibility and awareness of surroundings, driving with excessive cargo weight can adversely affect the vehicle's handling and braking, and turning with low visibility increases the risk of collisions. All of these factors are unsafe practices that could lead to accidents while turning, highlighting the importance of speed management as a key to safe truck operation.