Route 9 is a 135.310-mile-long (217.760 km) major east–west state highway in Massachusetts. Along with U.S. Route 20 (US 20), Route 2, and Interstate 90, Route 9 is one of the major east–west routes of Massachusetts, and like the others its eastern terminus is in Boston. Starting at Copley Square and passing along Huntington Avenue, Route 9 is a limited access route through the MetroWest suburbs to Worcester, and is also a major alternative to the Pike's toll road west of the city. After passing along major city streets in Worcester, the road becomes a country route, passing through the central Worcester Hills, the Pioneer Valley, and the city of Northampton, and into The Berkshires. The road ends near the center of the city of Pittsfield.