An operator must not park how many feet from a stop sign, intersection, or yield sign?

The requirement for parking a certain distance from a stop sign, intersection, or yield sign is designed to ensure safety and visibility for all road users. Parking too close to these signs can obstruct the view for drivers, making it difficult to comply with traffic signals and signs, thereby increasing the risk of accidents.

In this instance, the correct distance is 30 feet from the indicated signs. This distance is established to provide adequate space for vehicles to navigate intersections safely. By maintaining this distance, operators help ensure that their vehicle does not block the line of sight for other drivers and that they do not create potential hazards for pedestrians.

The other distances provided do not align with the standard regulations set forth in transportation codes, which specify 30 feet as the safe distance for parking. This measure helps promote traffic flow and safety, making the correct answer critical for understanding proper parking regulations.