The yellow light is flashing and the intersection is clear. Which vehicles can proceed?

All vehicles are allowed to proceed as long as they check carefully to ensure the intersection is clear.

Explanation:

Upon seeing a flashing yellow light, vehicles are expected to slow down and check the intersection and then proceed carefully.

However, when there is a steady yellow light and a vehicle cannot stop safely, or it has already entered the intersection or crossed the limit line, before the light turns red, then such a vehicle is allowed to proceed carefully.