Today the city is home to a variety of specialty manufacturers, as well as Westover Air Reserve Base, the largest Air Force Reserve Base of the United States, built in 1940 with the emergence of World War II. Chicopee today goes by the nickname the "Crossroads of New England" as part of a business-development marketing campaign, one that West Springfield also uses. The name reflects the city's location among a number of metropolitan areas and its transportation network. Four interstate highways run through its boundaries, including I-90, I-91, I-291, and I-391, as well as state routes such as Route 33, 116, and 141.