What does safe operating guidelines for vehicles emphasize about passing other vehicles?

The emphasis on limiting passing to areas with visibility is rooted in safety considerations. Clear visibility allows the driver to see oncoming traffic, potential hazards, and road conditions ahead, which is crucial for making informed decisions while passing another vehicle. When visibility is compromised—such as in curves, hills, or poor weather conditions—the risks associated with passing increase significantly, including the possibility of collisions. Therefore, safe operating guidelines prioritize minimizing these risks by recommending that passing maneuvers take place only in clear, unobstructed areas where the driver can assess the road ahead and ensure safety for all road users. Other options suggest either unrestricted passing or limiting it to intersections, which could lead to dangerous situations.