Smart work zone

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A smart work zone is a road construction zone in which technology is employed to increase safety and provide information. Smart work zones often use radar guns or other sensors to detect the presence and speed of vehicles approaching a work zone, in order to display an appropriate message on one or more variable message signs.

In a "dynamic merge" system, for example, vehicles approaching a lane closure are directed to use all available lanes when congestion develops and speeds are low. When speeds are high, motorists are directed to merge early or are left to use their own judgement. Such a system is usually deployed in addition to traditional static messaging.