Lane control signals are overhead devices that direct traffic flow on multi-lane roads by indicating which lanes are available for use at given times.
The devices typically found overhead that indicate whether a lane can or cannot be used at a specific time are known as lane control signals or lane use management signals. These traffic control devices are used to manage traffic flow on highways, express lanes, or toll lanes, and they come in various forms, including lights and signs.
A green arrow indicates that a lane is open for use, while a red 'X' means the lane is closed. In some places, a flashing yellow 'X' or a solid yellow arrow advises caution, indicating that the lane is about to be closed or that drivers should prepare to move out of the lane.
It is crucial for drivers to understand and obey these signals for traffic efficiency and safety. Ignoring them can lead to traffic violations or even accidents.