What is the purpose of a red flashing light at an intersection?

The purpose of a red flashing light at an intersection is to indicate that drivers must stop completely before proceeding when it is safe. This requirement is designed to ensure the safety of all roadway users, including vehicles and pedestrians. A red flashing light functions similarly to a stop sign, meaning that drivers must come to a full stop, check for oncoming traffic, and only proceed when it is safe to do so. This helps prevent accidents by ensuring that all drivers have a chance to assess the situation at the intersection before moving forward.

In contrast, the other options refer to different traffic control devices or rules. Yielding to oncoming traffic is typically indicated by a yield sign rather than a flashing red light. Pedestrian crosswalks are signaled with different markings or lights and do not use red flashing lights. A warning to slow down is usually signaled with yellow lights or signs, not red ones. Understanding the specific meaning of a red flashing light is crucial for safe driving at intersections.