What do zigzag lines at a crossing mean?

Answer: C — No parking and no overtaking

Zigzag lines at a crossing are designed to indicate that parking and overtaking are prohibited in that area to enhance safety for pedestrians. The purpose of these markings is to ensure that the view of pedestrians is not obstructed by parked vehicles, allowing both drivers and pedestrians to have a clear line of sight. This is particularly critical around crossings where the risk of accidents is heightened due to the presence of pedestrians. The other options do not correctly represent the significance of zigzag lines. They do not serve as a warning of a crossing on their own nor do they indicate that stopping is only for pedestrians. Additionally, the suggestion of parking being allowed at certain times contradicts the function of zigzag lines, which are meant to maintain a clear and safe environment for pedestrian movement at all times.