To guide the driver, how far should you stand from the front roadside bumper of the vehicle at a minimum?

Standing a minimum of 4 feet from the front roadside bumper of the vehicle when guiding the driver offers a balance between safety and visibility. This distance allows the guide to maintain an adequate space to avoid potential hazards, such as the vehicle's movement or any unforeseen circumstances that could arise as the vehicle maneuvers. Moreover, being within this distance ensures that the driver can clearly see the guide and receive visual cues effectively. The choice of 4 feet is typically regarded as a standard practice that allows for effective communication and reduces the risk of accidents during vehicle guidance.