In which situation is it safe to pass another vehicle?

Passing another vehicle is primarily about ensuring safety and adhering to traffic laws. Choosing to pass when there are no approaching vehicles indicates a clear and safe opportunity. This means that you have assessed the road conditions, visibility, and any potential hazards that could arise from the maneuver.

When there are no oncoming vehicles, you can confidently execute the passing without the risk of a head-on collision. Additionally, the absence of approaching traffic allows for a more controlled and cautious approach to overtaking the slower-moving vehicle.

In contrast, passing in a "No Passing Zone" is against traffic regulations, which are put in place to protect drivers and ensure safety on the roads. Adverse weather conditions can significantly reduce visibility and traction, making passing more hazardous. Finally, attempting to pass at a stoplight does not align with traffic flow, as vehicles are generally stopped, and the context requires caution rather than overtaking. Thus, the situation where it is safe to pass is when the road is clear of oncoming traffic.