Route 220 was commissioned circa 1938, leading from Route 192 east and north to the state line: a total of 2.90 miles. On Oct. 7, 1963, it was extended westward along Shaker Road and Elm Street to US 5.

Alternate Route 190 proposed

In the late 1990s, the Capitol Region Council of Governments initiated a study of Route 190 in Enfield and Somers, to address projected traffic increases on the road. A major widening was ruled out. However, in a December 2000 meeting the idea surfaced to extend Route 220 eastward instead of north, to end at Route 186 or Route 83 in Somers. This way, Route 220 could serve as a northern alternative to Route 190.

• "Town, State Exchanging 7 Miles of Road Ways." Hartford Courant, Sept. 26, 1963.
• "Enfield talks about better Route 190." Journal Inquirer (Manchester, Conn.), December 12, 2000.

• Route 220 Ends (Photos; Doug Kerr at state-ends.com)
• Route 220 - Google Maps