When entering a street from a private alley or driveway, what must you do?

When entering a street from a private alley or driveway, the appropriate action is to yield to approaching vehicles and pedestrians. This rule is in place to ensure safety for both the driver exiting the alley or driveway and for pedestrians or vehicles already traveling on the street. By yielding, the driver is allowing for any oncoming traffic or pedestrians to pass safely, thereby minimizing the risk of collisions.

The other options suggest actions that do not align with traffic safety rules. For instance, proceeding at a specific speed limit of 5 mph may not be safe without first ensuring the area is clear, while stopping only when turning left fails to address the need to assess all directions. Similarly, sounding the horn may not be necessary or appropriate in most situations and could startle pedestrians or other drivers rather than facilitate safe movement. Therefore, yielding is the safest and legally mandated action when entering a street from a private alley or driveway.