What does the red fork light or arrow light represent when it is on?

The red cross light indicates that the road section is forbidden to pass, and it is not allowed to go straight or turn. Used for road congestion, road damage, front closed construction, emergency rescue, etc. The red arrow light indicates that the direction indicated by the arrow is impassable, and you can drive normally when the light is green. It is used at crossroads. Traffic signal lamp is a signal lamp that directs traffic operation, which consists of red light, green light and yellow light. Red light means no traffic, green light means permission, and yellow light means warning. Traffic lights are divided into: motor vehicle lights, non-motor vehicle lights, crosswalk lights, direction lights, lane lights, flashing warning lights, etc.