what does this flashing traffic signal at an intersection indicate?
Steady Light Traffic Signals. Typically, traffic signals either appear with a steady light or a flashing light. The message behind a steady light signal differs depending upon the color of the light: Steady red lights signal a stop. When approaching an intersection, you must stop before the pedestrian crosswalk.
A delayed green light means that traffic stopped on one side of an intersection with a traffic signal get the green light to proceed prior to the traffic on opposite side of the intersection. Traffic on both sides get a green light; the delay just means that one side moves prior to the other.
According to the California Department of Motor Vehicles, a blinking or flashing yellow light means that drivers should proceed with caution. Unlike a blinking red light, a blinking yellow light does not require drivers to stop, but it does suggest that they slow down and remain particularly alert.