What does a flashing red light indicate?

A flashing red light indicates that drivers must come to a complete stop at the intersection, just as they would at a stop sign. After stopping, they may proceed through the intersection only when it is safe to do so. This requirement is crucial for ensuring that drivers remain vigilant and compliant with the rules of the road, particularly at intersections where visibility may be limited or where other vehicles and pedestrians may be present.

In contrast, the other options suggest actions that do not comply with the meaning of a flashing red light. For instance, proceeding with caution would imply that a driver could move forward without stopping, which contradicts the requirement to stop. Yielding to pedestrians is important but does not fully encompass the need to stop. Lastly, the notion of turning left only is too restrictive and does not adhere to the general rule of stopping first before making any movement at a flashing red light. Thus, understanding the correct response reinforces the critical safety measures associated with traffic signals.