All lanes of Route 3 westbound in Clifton were closed Tuesday night after concrete fell from the Route 46 bridge over Route 3 at about 6:30 p.m.
The state Department of Transportation responded to the scene.
DOT structural engineers evaluated the situation to determine why the cement blocks fell and whether any more were in danger of collapsing.
Police say no vehicles were hit by the debris and no one was injured.
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