New Hampshire Route 155
|Maintained by NHDOT|
|Length:||11.26 mi (18.12 km)|
|South end:||NH Route 125 in Epping|
|U.S. Route 4 in Lee|
|North end:||NH Route 9 in Dover|
New Hampshire Route 155 (abbreviated NH 155) is an 11.26-mile (18.12 km) secondary north–south highway in southeastern New Hampshire. The highway runs from Epping in Rockingham County to Dover in Strafford County. There is also a secondary loop from NH 155 into Durham designated as New Hampshire Route 155A.
The southern terminus of NH 155 is in Epping at the junction with New Hampshire Route 125 (Calef Highway). Only 0.4 miles (0.7 km) north, the road crosses the county line into Strafford County and the town of Lee, crossing NH 152 along the way as North River Road. NH 155 travels through the center of Lee, where its name changes to Mast Road. A few miles later, NH 155A, continuing as Mast Road, splits off eastward into Durham while NH 155 turns northward towards Dover, as Turtle Pond Road. Continuing north the NH 155 then meets U.S. Route 4 at a half-diamond interchange, limiting access to two movements: US 4 eastbound to NH 155 and NH 155 to US 4 westbound. Access to US 4 eastbound is facilitated by nearby NH 155A, which rejoins its parent here and runs east to its own interchange with US 4. NH 155 continues north along the western edge of Durham and the eastern part of Madbury before crossing into the city of Dover. The highway continues northward as Knox Marsh Road for another couple of miles before reaching its northern terminus at NH 9, less than a quarter-mile shy of its interchange with the Spaulding Turnpike (at exit 8). NH 9 continues along Knox Marsh Road towards downtown Dover.
|Rockingham||Epping||0.0||0.0||NH 125 (Calef Highway) - Epping, Rochester||Southern terminus of NH 155|
|Strafford||Lee||1.4||2.3||NH 152 (Wadleigh Falls Road) - Nottingham, Newmarket|
|5.1||8.2||NH 155A north (Mast Road) - Durham||Southern terminus of NH 155A|
|6.1||9.8||US 4 west (Concord Road) - Concord||Partial interchange, no access to US 4 east from NH 155, or to NH 155 from US 4 west|
|6.2||10.0||NH 155A north (Sherburne Road) to US 4 east - Durham, Portsmouth||Northern terminus of NH 155A|
|Dover||11.3||18.2||NH 9 (Littleworth Road/Knox Marsh Road) to NH 16 (Spaulding Turnpike) - Barrington, Dover||Northern terminus of NH 155|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
New Hampshire Route 155A
|Length:||3.08 mi (4.96 km)|
NH 155A is a three-quarter loop of NH 155, running 3.08 miles (4.96 km) in the towns of Lee and Durham. It functions as a full-access point to US 4, as NH 155 intersects US 4 at a partial interchange. It is also the preferred method of accessing the University of New Hampshire Durham campus from US 4.
The southern terminus of NH 155A is in Lee at the intersection of Mast Road and Turtle Pond Road. NH 155 turns northward towards Madbury while NH 155A continues northeast on Mast Road and crosses into Durham. NH 155A runs into the western part of the UNH campus until reaching Main Street. The highway turns left on Main Street heading away from the center of campus and interchanges with US 4. NH 155A continues west, crosses back into Lee, and ends at NH 155 near the partial interchange with US 4. The northern section of NH 155A in Lee is named Sherburne Road (formerly the Old Concord Turnpike).