The New Hampshire Department of Transportation is doing night paving work associated with a reconstruction project at the intersection of U.S. Route 1 and the U.S. Route 1 Bypass in Portsmouth. The work is scheduled for Sunday through Thursday, Aug. 14, from 7 p.m. to 6 a.m. each day. The department says drivers traveling through the work zone during these time periods should anticipate traffic shifts and possible alternating traffic during overnight hours. Uniformed officers and flaggers will guide motorists through the work zone. Weaver Brothers Construction, Inc., of Bow is the prime contractor for the $4.3 million project, which is scheduled to be completed this month.