Tappan Zee, a critical link in Northeast, hits milestone

A span on the new Tappan Zee Bridge, foreground, awaits completion while motorists continue to use the older bridge, background, near Tarrytown, N.Y., Tuesday, Dec. 20, 2016. The $4 billion bridge replacement, one of the biggest infrastructure efforts currently underway in the U.S. Work continues on the new Tappan Zee Bridge near Tarrytown, N.Y., Tuesday, Dec. 20, 2016.
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