When above the lanes devices with red and green signals are installed, these are intended for signalling the lanes with reversible traffic.
The red signal having the shape of two crossed bars prohibits access on the lane above which it is located.
The green signal with the downward arrow allows entering and driving on that lane.
The yellow or white signal with the diagonal arrow announces the change of the colour. This signal announces that the lane above which it is located will be closed to traffic and you are obliged to move on the lane or lanes indicated by the arrows.
The middle lanes can be used in both directions, depending on the colour of the traffic lights above the lanes.
Example: On Friday, since traffic is heavier in one direction, four lanes are used in the direction from the urban area. On Sunday it will be the opposite, the traffic being heavier in the direction towards the urban area.
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