Backing incidents. Prevention.
Backing incidents are just like front facing strikes, only different. An operator moving equipment in reverse has limited line of sight because parts of the equipment block his/her view. Any person who is walking, standing or kneeling behind the equipment will be unseen by the operator. Each year more than 70 people are fatally injured in back over incidents. Such incidents or near misses occur even where back up alarms in functioning.
The best ways to avoid back overs are: First, the operator make especially sure the rearward travel path is clear. Second, remind, on a daily basis during tool box talks, that all ground personnel pay attention to mobile equipment at all times. Third, schedule ground work to be handled beyond the travel path of mobile equipment. Fourth, position spotters to have a clear view of all ground work 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.