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Lane reversal signals are used to control the direction of traffic on specific lanes of a roadway. A common use of this control is reversible lanes that change the flow of traffic during different times of the day. The signal(s) over one or more lanes change between a red X and a green arrow.
Solid red X
When a red X is displayed over a driving lane, the driver does not enter or remain in that lane. This signal indicates that the lane is being used by oncoming traffic. Move safely into a lane with a green arrow.
Downward pointing green arrow
A driver facing the downward pointing green arrow is permitted to travel in that lane.