What should you check in addition to mirrors while backing up?

When backing up a vehicle, checking your surroundings over your shoulder is crucial for safety. This action allows you to spot any obstacles, pedestrians, or other vehicles that may not be visible in your mirrors. Mirrors can provide a helpful view of the sides and rear of the vehicle, but they often do not cover all your blind spots, especially those behind the vehicle. By turning your head and looking directly over your shoulder, you enhance your awareness of the entire environment, reducing the risk of accidents while maneuvering in reverse. This practice aligns well with safe driving habits, ensuring that you are fully aware of everything in your immediate vicinity before proceeding.