Reversible traffic lights control traffic in specific lanes, especially reversible lanes where the traffic direction can change. These lights have a red X-shaped signal and a green arrow pointing down. The red X bans driving in the lane under it. The green arrow allows driving in the lane under it.
These reversible traffic lights can also have a yellow arrow pointing diagonally down to the right or left. This yellow arrow warns that the signal will change soon. It tells drivers to change lanes to the lane the arrow points to.
When the signals of a reversible traffic light located over a lane marked on both sides with 1.9 pavement markings are turned on, entering this lane is banned.
