What does a solid red traffic light mean?

A solid red traffic light indicates that drivers must come to a complete stop at the intersection. This rule is fundamental for maintaining orderly traffic flow and ensuring the safety of all road users, including pedestrians. While waiting at the red light, drivers should remain stopped until the light changes to green, signaling that it is safe to proceed.

Understanding the implications of a red light is crucial; it prevents potential collisions and accidents caused by vehicles entering intersections indiscriminately. The other options suggest actions such as proceeding or slowing down, which contradict the requirement of stopping at a red light. Therefore, recognizing the importance of stopping at a solid red signal is essential for compliant and safe driving practices.