The Detroit Region Aerotropolis (also referred to as the DRA, Detroit Aerotropolis or Michigan Aerotropolis) is a four-community, two-county public-private economic development partnership focused on driving corporate expansion and new investments around Wayne County Airport Authority's airports: Detroit Metropolitan Airport and Willow Run Airport. The Detroit Region Aerotropolis promotes greenfield expansion in Southeast Michigan, offering development-ready land centered in an expansive network of transportation infrastructure including two airports, three major interstates, five Class-A rail lines, and the American Center for Mobility.