What is one crucial thing to do while backing up in parking lots?

Remaining extra cautious for pedestrians while backing up in parking lots is crucial because parking lots are often busy areas with pedestrians moving around. Drivers must be vigilant and aware of their surroundings to ensure the safety of all individuals, particularly children and those who may not be easily visible. Pedestrians can be difficult to spot due to parked vehicles or visual obstructions, and they may not always be aware of oncoming cars.

Using the horn frequently may create confusion and alarm rather than improving safety. Looking for shop windows could help in gauging nearby foot traffic, but it doesn't address the immediate concern of pedestrian safety directly in the backing-up scenario. Driving at high speed for quick clearance endangers not only the driver but also the pedestrians and other vehicles in the vicinity, which can lead to serious accidents. Therefore, prioritizing caution for pedestrians is the most sensible and responsible choice while maneuvering in such an environment.