When riding on a roadway, maintaining a safe distance from parked cars is important to avoid which situation?

Maintaining a safe distance from parked cars is crucial primarily to avoid the risk associated with doors opening unexpectedly. When a vehicle is parked, especially on the side of the road, the occupants may not always check for oncoming traffic before exiting. If a driver or rider is too close to the parked vehicles, they could be caught off guard by a door opening suddenly, which can lead to a collision. By keeping a safe distance, riders can react appropriately and avoid potential accidents that could cause injury to themselves or damage to their vehicle.

While being seen by drivers, sudden stops of other vehicles, and collisions with cyclists are also important considerations for road safety, the immediate danger posed by an unexpected door opening is a unique hazard specific to traveling near parked vehicles.