Backing incidents are just like front-facing strikes, only different. An operator is moving the equipment rearward and a person is walking, standing, or kneeling behind the equipment, unseen by the operator. Each year more than 70 people are fatally injured in back-over incidents. Such incidents or near misses occurring even where backup alarms in functioning.
The best way to avoid backovers exists in several elements:
First, the operator makes especially sure the rearward travel path is clear.
Second, remind, on a daily basis during toolbox talks, that all ground personnel pays attention to mobile equipment at all times.
Third, schedule groundwork to be handled beyond the travel path of mobile equipment. Fourth, position spotters to have a clear view of all groundwork in the equipment travel path and the operator keeps a constant view of the spotter.
https://www.osha.gov/preventing-backovers for more information on preventing back over incidents.