What is the primary purpose of controlled braking?

The primary purpose of controlled braking is to maintain vehicle control in a straight line. This technique involves applying the brakes in a smooth and measured manner, allowing the driver to manage the vehicle's speed while ensuring that stability and control are preserved. During this process, the driver can avoid skidding or losing grip, which are critical factors when driving heavy vehicles.

This approach is particularly important in scenarios where sudden or abrupt braking could lead to loss of control, especially given the dynamics of larger vehicles. A well-executed controlled brake allows the driver to make adjustments and maintain a straight path, which is vital for safe driving.

While reducing speed rapidly can sometimes be necessary, it's not the main goal of controlled braking since doing so abruptly might jeopardize the vehicle’s stability. Similarly, although controlled braking might be useful when preparing for sharp turns or changing lanes safely, those situations require specific techniques that incorporate other aspects of vehicle handling beyond just braking.