In what situation should you not pass another vehicle?

Passing another vehicle is unsafe and not allowed when there is a solid line on your side of the road. The solid line serves as a legal warning indicating that passing is prohibited in that area due to potential hazards. This designation is generally based on visibility, road conditions, and the risk of accidents. When a solid line is present, it's crucial to adhere to the rule as it is intended to keep all road users safe by preventing passing in areas where it could be dangerous, such as near intersections, hills, or curves where visibility is limited.

Situations such as passing on a one-way street, during the day, or when there are no cars around do not inherently prohibit passing and may sometimes be considered safe, depending on the specific circumstances and road markings.