When is it legal to park on single yellow lines?

Parking on single yellow lines is legal during designated time zone restrictions. This means that there are specific hours during which parking is allowed or prohibited on those lines, typically indicated by nearby signage. Single yellow lines are commonly used to indicate that parking is restricted during specific times to ensure traffic flow and safety during peak hours or in areas where parking could cause congestion.

For example, in a residential area, single yellow lines might be in place to prevent parking during school drop-off and pick-up times to keep the area clear for students and parents. During the times outside of these restrictions, it is permissible to park on those lines. This understanding is crucial for drivers to avoid fines or penalties and to ensure compliance with local traffic regulations.

The other options suggest scenarios that do not align with the established rules regarding single yellow line restrictions.