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|Q||Why do I sometimes see a highway coned off but don't see any work going on?|
Caltrans usually puts up signs and other "traffic control" devices only if work is going on. However, workers may have to leave because of an accident, to get materials or for other reasons. Also, sometimes work is not clearly visible to motorists, like when it occurs underneath a bridge or in the superstructure. Other times, a lane may be blocked to allow concrete to dry.