What action should be taken if the dumper starts to tip?

When a dumper starts to tip, the most appropriate response is to immediately reduce speed and steer straight. This action is crucial because it helps to maintain control of the vehicle while preventing it from tipping over completely. By reducing speed, the operator minimizes the force acting on the dumper, which can help stabilize it. Steering straight keeps the vehicle aligned and balanced, further reducing the risk of a complete rollover.

Adjusting the load is not immediate or practical in the moment of tipping, as it may not effectively counteract the tipping motion. Abandoning the vehicle is not advisable while it is in motion or tipping, as it can lead to serious injury. Signaling for help should only be done after ensuring safety and stabilization of the vehicle, making it less effective as an immediate response to the situation.