sentences:  The eastern and northern exits are part of the U.S. Route 1 Bypass, and the western exit marks the eastern end of U.S. Route 4, as well as the southern terminus of NH Route 16 and the Spaulding Turnpike.Traffic from southbound I-95 also enters the circle here after navigating a circuitous series of ramps from exit 5.Drivers leaving the circle to join I-95 can head south towards Massachusetts or north to Maine.