Red X: Never drive in a lane marked with a red X signal.
Yellow X or Yellow Diagonal Downward Arrow: These signals mean that you should move out of the lane as soon as safely possible.
Green Arrow: You are permitted to drive in a lane marked with a green arrow signal.
Left-turn Arrow: You are permitted to enter in a lane marked with a one-way or two-way arrow only to turn in the direction of the arrow.
