Route 110 is a southwest–northeast state route in the U.S. state of Massachusetts. Route 110’s western terminus is at a concurrency of Route 12 and Route 140 in West Boylston, and its eastern terminus is at the junction of U.S. 1 and Route 1A in Sailsbury, a few miles from the Atlantic Ocean. Route 110 provides an alternate route for the northern part (section after Route 2) of I-495. Route description Route 110 begins at Route 12 in West Boylston, just north of the Wachusett Reservoir and the border with Worcester. The route follows north of the reservoir, passing through Sterling before entering Clinton. In Clinton, Route 110 shares a quarter-mile concurrency with Route 62 and Route 70 before heading northward, crossing the Nashua River and passing through Lancaster. The route continues into Bolton, crossing Route 117 and passing the Bolton Flats before entering the town of Harvard. Route 110 continues through the village of Still River, wrapping around Bare Hill Pond before joining Route 111, starting a 3.7-mile long concurrency which crosses Route 2 at Exit 109 (formerly 38), just east of Fort Devens. The concurrency with Route 111 ends in Ayer in Middlesex County at a rotary junction with Route 2A, where Route 110 begins a concurrency with Route 2A eastward into Littleton. In Littleton, Routes 110 and 2A cross the Fitchburg Line railroad tracks before meeting I-495 at Exit 79 (formerly 30), beginning Route 110's long relationship with the interstate. At Route 119. Route 2A leaves Route 110 to head eastward, with Route 110 entering Westford. In Westford, Route 110 shares a short concurrency with Route 225 before continuing just south of I-495, accessing the highway again off of Boston Road. Route 110 enters Chelmsford, meeting Massachusetts Route 4 and the western end of Route 129 at the center of town, just north of the northern end of Route 27. Route 110 then crosses I-495 at Exit 88 (formerly 34), and then shortly meets U.S. Route 3 at Exit 81C (formerly 31), just as Route 110 enters the city of Lowell. In Lowell, Route 110 joins Route 3A near the Gallagher Transit Center and just north of the northern end of the Lowell Connector. Route 110 continues eastward, meeting the western end of Route 133 at Route 38, joining Route 38 to head northward across the Merrimack River via the Hunts Falls Bridge. Just north of the