What is indicated by a red traffic light?

A red traffic light universally indicates that drivers must come to a complete stop before the intersection. This rule is designed to prevent accidents and ensure the safety of all road users, including pedestrians and cyclists. When a red light is encountered, the vehicle must wait until the light changes to green before proceeding. This traffic control device plays a crucial role in managing traffic flow and ensuring that drivers are not engaging in behaviors that could lead to collisions.

The other options present actions that do not align with standard traffic laws. Yielding only to pedestrians does not account for the necessity of stopping for the red light. Proceeding with caution might imply moving into the intersection, which is not permitted when the signal is red. Speeding up to clear an intersection is dangerous and could result in serious accidents. Thus, understanding the requirement to stop at a red light is essential for safe driving practices.