Back up alarms or reversing buzzers installed on vehicles and equipment can alert pedestrians, workers, and other nearby people to the presence of large moving objects that may be difficult to see. They are commonly used in construction machinery, garbage trucks, delivery vans, and other vehicles and equipment that can pose a danger to pedestrians or workers.
When a vehicle is reversing, the reversing alarm usually emits a loud beep, which is a warning sign that alerts anyone who may be walking or working nearby. Alerts are similar, but may be activated in different situations, such as when a vehicle is turning or changing lanes. The purpose of these alerts is to help prevent accidents and injuries, especially in busy and crowded environments where visibility may be limited.