Which of the following actions should be avoided when driving a heavy vehicle?

Frequent lane changes without signaling should be avoided when driving a heavy vehicle because it compromises safety for both the driver and other road users. Heavy vehicles, due to their size and weight, require more time and space to maneuver compared to lighter vehicles. When a driver changes lanes frequently without signaling, it can lead to confusion among other drivers, increasing the risk of collisions.

Proper signaling alerts other road users of the driver's intentions, allowing them to react appropriately. This practice is particularly vital for heavy vehicles, which may have larger blind spots and require longer stopping distances. Maintaining safe driving practices, such as proper signaling, helps create a safer driving environment. In contrast, maintaining a safe following distance, using signals for turns and stops, and checking mirrors regularly are all essential actions that enhance safety on the road.