New Hampshire Route 155

New Hampshire Route 155
Map of southeastern New Hampshire with NH 155 highlighted in red
Route information
Maintained by NHDOT
Length:	11.259 mi (18.120 km)
Major junctions
South end:	NH 125 in Epping
	US 4 in Lee
North end:	NH 9 in Dover
Location
Counties:	Rockingham, Strafford
Highway system
New Hampshire Highway System Interstate U.S. State Turnpikes ← NH 153 NH 156 →

New Hampshire Route 155 is an 11.259-mile-long (18.120 km) secondary north–south highway in southeastern New Hampshire, almost entirely within Strafford County. The highway runs from New Hampshire Route 125 in Epping to New Hampshire Route 9 in Dover.

A secondary loop of NH 155 runs into Durham, designated as New Hampshire Route 155A (see below).

The southern terminus of NH 155 is in Epping at the junction with NH 125 (Calef Highway). Just 0.341 miles (0.549 km) to the north, the highway crosses the county line into Strafford County and the town of Lee, crossing NH 152 along the way. NH 155 travels through the center of Lee. A few miles later NH 155A splits off eastward into Durham while NH 155 turns northward towards Dover. Continuing north, NH 155 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 and runs east (signed south) 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 north for another couple of miles before reaching NH 9, less than ¹⁄₄ mile (0.4 km) from the Spaulding Turnpike exit 8 interchange. The roadway continues as NH 9 eastbound towards downtown Dover.