What does a "No stopping during the period indicated except for buses" traffic sign mean?

A "No stopping during the period indicated except for buses" traffic sign indicates that while most vehicles are prohibited from stopping in the designated area during the specified times, buses are given an exemption from this rule. This exception is typically made to accommodate public transportation vehicles that need to pick up or drop off passengers. Such regulations are in place to ensure that public transit can operate efficiently, thereby encouraging its use while maintaining the flow of traffic for other vehicles. Understanding this sign is essential for recognizing that while general traffic is restricted, public transit vehicles have the flexibility to stop as necessary for passenger needs.