 The only segment that has been built is a short interchange road between US 3, the Daniel Webster Highway, and N.H. Route 3A.This section utilizes the Sagamore Bridge, one of the two bridges over the Merrimack River connecting Hudson to Nashua.The completed section begins at US 3, has a single interchange with the D.W. Highway, crosses the river, and terminates at NH Route 3A in Hudson.