When backing up a large vehicle, what is the safest practice?

Having a co-worker assist in backing up a large vehicle is considered the safest practice because it enhances visibility and safety. A co-worker can stand behind the vehicle and provide guidance, ensuring the driver is aware of any obstacles and can navigate safely. This method relies on effective communication between the driver and the helper, which can significantly reduce the risk of accidents.

Using just mirrors may not provide a complete view of the area behind the vehicle, especially in large vehicles where blind spots can be substantial. Setting cones can help define the area but does not account for unexpected obstacles like pedestrians or other vehicles. Getting out to check for obstructions can slow down the process and may still leave room for error if the situation changes quickly. Therefore, having a co-worker assist combines the effectiveness of direct observation and communication with the driver, making it the safest practice when backing up large vehicles.