When is it safe to pass another vehicle?

Answer: C — Only in designated passing zones

Passing another vehicle is safest when conducted in designated passing zones. These areas are specifically marked and typically indicate that it is legal and safe to overtake another vehicle. These zones are chosen based on visibility, road width, and traffic patterns to minimize risks. In contrast, passing in other scenarios can lead to dangerous situations. For example, being able to see oncoming traffic doesn't automatically mean it's safe if it's outside a designated zone, as it could lead to collisions if one misjudges speed or distance. Similarly, passing any slow vehicle at any time could lead to unsafe situations, including the risk of running into other traffic or road hazards. Lastly, relying on another driver’s signals for passing is not sufficient, as they may not be aware of your intentions or the overall traffic situation. Thus, designated passing zones provide a structured and legally recognized framework to help ensure safety while overtaking another vehicle.