When is it NOT safe to pass on the left?

Passing on the left is prohibited when approaching a curve in the highway where the driver’s view is obstructed because visibility is critical for safe overtaking. In this scenario, the inability to see oncoming traffic or obstacles ahead can lead to potentially dangerous situations, increasing the risk of a collision. It is essential to ensure you have a clear line of sight to safely execute a passing maneuver.

In contrast, passing on a straight road is typically safer, as visibility is generally better, and a low speed limit may not necessarily obstruct a safe passing opportunity. A dashed yellow line indicates that passing is permitted when safe, while other conditions may also favor overtaking if they do not compromise visibility or pose risks.