New Hampshire Route 106 is a 34.535-mile-long (55.579 km) secondary north–south highway in Merrimack and Belknap counties in central New Hampshire. It connects the town of Pembroke with Meredith in the Lakes Region. The first green LED traffic light in the nation was installed at the junction of NH 106 and Loudon Road on May 17, 1996. The southern terminus of NH 106 is at U.S. Route 3 in Pembroke just south of the Concord city line. The northern terminus is also at US 3, south of Meredith.