When a broken white line and a solid white center line appear together, traffic on which side is allowed to pass?

Answer: B — Broken line side

The presence of a broken white line alongside a solid white center line indicates that passing is permitted for traffic on the side of the broken line. This configuration is specifically designed to allow vehicles on the broken line side to overtake slower-moving vehicles or make necessary maneuvers, while traffic on the solid line side is restricted from passing. The solid line serves as a guide to emphasize that vehicles must not cross it for passing since doing so would be unsafe. Therefore, understanding this road marking is crucial for safe driving practices, as it is designed to ensure the safety and fluidity of traffic flow.