What is the main aspect to consider when negotiating sharp turns with a combination vehicle?

When negotiating sharp turns with a combination vehicle, it is important to recognize that the trailer can swing out wider than the truck, necessitating additional space. This is known as the "offtracking" effect, which occurs when the rear wheels of the trailer do not follow the same path as the rear wheels of the truck. As a result, the driver must take into account the extension of the trailer during the turn to avoid collisions with obstacles, curb, or other vehicles. By ensuring there is sufficient space, the risk of accidents, particularly in tight urban or rural environments, can be minimized, allowing for safer maneuvering of the vehicle.

Conversely, considering the truck should be in low gear, taking turns at a higher speed, or avoiding the use of mirrors does not address the fundamental need to accommodate the trailer's movement. Low gearing is important for power and control, but it does not specifically address the spatial requirements for negotiation of sharp turns. Speeding through a turn is generally dangerous and contradicts safe driving practices, while avoiding the use of mirrors can lead to a lack of awareness around the vehicle, increasing the risk of accidents.