Which safety measures are required for loading and haulage equipment?

The choice regarding audible back-up warning devices and safety cab windows highlights critical safety measures for loading and haulage equipment. An audible back-up warning device is essential because it alerts nearby personnel when the equipment is reversing, thereby reducing the risk of collisions or accidents that may occur if individuals are unaware of the equipment's movements. This measure is particularly important in environments where visibility can be limited or where there are many blind spots.

Safety cab windows also contribute to improved visibility for the operator. Enhancing visibility ensures that the operator can better monitor their surroundings, identify potential hazards, and thus make safer decisions while operating the equipment. Together, these features aim to create a safer working environment by addressing some of the most common dangers associated with operating heavy machinery during loading and haulage activities.

While the other options mention safety enhancements such as automatic brakes, visibility enhancements, and external safety lights, they do not encompass the operational context and immediate risks associated with blind spots and reversing movements to the same extent as the audible back-up warnings and safety cab windows do. These two elements are pivotal in promoting awareness and communication in busy work zones, especially in loading and haulage operations.