What is the method of stab braking primarily used for?

The method of stab braking is primarily used for bringing a vehicle to a stop while maintaining control, especially in emergency situations. This technique involves fully applying the brakes to the point of wheel lock, then releasing them to regain traction, and repeating the process as necessary. This method helps prevent the vehicle from skidding, allowing the driver to retain steering control while navigating through a potentially hazardous situation.

In the context of school bus driving, where safety is paramount, stab braking can be an effective way to slow down the bus quickly while reducing the risk of losing control. This is particularly useful in scenarios where immediate stopping is needed, such as when a child unexpectedly crosses the street in front of the bus. By utilizing stab braking, a driver can effectively manage how the bus slows, balancing the need to stop quickly with the ability to make adjustments in steering as required.

The other options describe different braking techniques that do not align with the specific purpose of stab braking. For instance, swerving is a maneuver meant to avoid obstacles rather than focusing on stopping. Applying firm, steady pressure on service brakes denotes a consistent braking effort without the dynamic response needed in an emergency stop.