U.S. Route 20 in Massachusetts

U.S. Route 20
U.S. Route 20
	US 20 highlighted in red
Route information
	Maintained by MassDOT
Length	153.44 mi (246.94 km)
Existed	1926[citation needed]–present
Major junctions
West end	US 20 at the New York state line in Hancock
	US 7 from Pittsfield to Lenox; I-90 / Mass Pike / Route 102 in Lee; US 202 / Route 10 in Westfield; US 5 in West Springfield; I-91 / I-291 in Springfield; I-84 in Sturbridge; I-290 / I-395 in Auburn; I-90 / Mass Pike / Route 122A / Route 146 in Millbury; I-495 in Marlborough; I-95 / Route 128 in Waltham;
East end	Route 2 in Boston
Location
Country	United States
State	Massachusetts
Counties	Berkshire, Hampshire, Hampden, Worcester, Middlesex, Suffolk
Highway system
	United States Numbered Highway System; List; Special; Divided; Massachusetts State Highway System; Interstate; US; State;

U.S. Route 20 (US 20) runs its easternmost 153 miles (246 km) in the U.S. state of Massachusetts. The highway crosses the state border from New Lebanon, New York, into Hancock and runs eastward to Boston, where it ends at Route 2 in Kenmore Square. It spends the vast majority of its journey paralleling I-90 (Massachusetts Turnpike), which has largely superseded US 20 for through travel. Still, US 20 directly serves many towns and local business areas which the turnpike bypasses.^[2]

US 20 is currently the longest numbered highway in the entire country, at an estimated length of 3,365 miles (5,415 km) between Boston and Newport, Oregon.^[1]

Parts of US 20 between the Worcester and Boston areas are part of an alignment of the Boston Post Road, an early colonial highway designated in 1673 for carrying mail between New York City and Boston.^[3] US 20 is still locally known as the "Boston Post Road" in the towns of Northborough, Marlborough, Sudbury, Wayland, and Weston.^[4]

^ ^a ^b Executive Office of Transportation, Office of Transportation Planning - 2007 Road Inventory Archived September 27, 2006, at the Wayback Machine
^ Vincent, Dan (2005). "US 20". homepage.mac.com. Archived from the original on May 14, 2011. Retrieved August 21, 2023.
^ S.H. Holbrook, The Old Post Road: The Story of the Boston Post Road, (McGraw-Hill, 1962)
^ Google (June 8, 2009). "U.S. Route 20 in Massachusetts" (Map). Google Maps. Google. Retrieved June 8, 2009.

[inventory-1] Executive Office of Transportation, Office of Transportation Planning - 2007 Road Inventory Archived September 27, 2006, at the Wayback Machine

[homepage.mac.com-2] Vincent, Dan (2005). "US 20". homepage.mac.com. Archived from the original on May 14, 2011. Retrieved August 21, 2023.

[3] S.H. Holbrook, The Old Post Road: The Story of the Boston Post Road, (McGraw-Hill, 1962)

[4] Google (June 8, 2009). "U.S. Route 20 in Massachusetts" (Map). Google Maps. Google. Retrieved June 8, 2009.

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