What assumption should be avoided regarding the behavior of drivers in parked vehicles?

Avoiding the assumption that drivers will always remain parked at all times is crucial for safe driving. This assumption can be misleading, as parked vehicles may become suddenly active. For instance, a driver could re-enter their vehicle and pull out into traffic or a passenger may open a door unexpectedly, creating a hazardous situation. Drivers should stay alert for any potential movements from parked vehicles, as this unpredictability can pose significant risks on the road. Understanding that parked vehicles can still be dynamic contributors to traffic scenarios helps ensure a more cautious and vigilant approach while driving.