Flashing arrow panels are used:
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Where it is necessary to move into another lane.
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At highway-rail intersections.
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To indicate that vehicles must not make a right or left turn at the intersection.
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At dangerous intersections.
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Explanation
Flashing arrow panels are traffic control devices used in work zones to alert drivers of upcoming lane closures due to construction or maintenance. These illuminated signs provide advance warning and clear directional guidance when you need to merge into another lane. When you see a flashing arrow panel, slow down and merge in the direction indicated. In work zones, always maintain extra following distance and be prepared for sudden stops.
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