Where is it illegal to pass another vehicle?

Passing another vehicle in a marked no-passing zone is illegal because these zones are designated for safety reasons. They are typically located in areas where visibility is limited, such as near curves or intersections, where attempting to pass could result in dangerous situations. The marking serves as a warning to drivers that the conditions are not safe for overtaking another vehicle, as it can lead to head-on collisions or other accidents.

In contrast, passing in front of a gas station may not always be illegal, but it can be dangerous due to the potential for pedestrians and vehicles entering and exiting the station. On straight roads, passing can be permitted as visibility and space are typically sufficient, while multi-lane highways often have designated lanes for passing, making it legal in those areas under certain conditions. However, the key rule remains that no-passing zones are explicitly marked to prevent hazardous maneuvers, which is why it is essential to adhere to these regulations for the safety of all road users.