sentences:  Most of its north section, northeast of the Portsmouth Circle where it meets the Blue Star Turnpike and Spaulding Turnpike, is built to rudimentary freeway standards, with no cross traffic but driveway access.The southern portion is similarly constructed, although there are two four-way intersections with traffic lights just south of the circle and a third at its south end, just before intersecting with US 1.The southern terminus is at US 1 in Portsmouth.