Project engineer Jay Van Echo said the goal of the I-11 corridor is access-controlled, north-south transportation that connects U.S. metropolitan areas with Mexico and Canada.

He said the final corridor could be one entirely new route or several new routes, connected to improved existing routes.

The maps unveiled Wednesday show alternatives for the interstate run west of Interstate 10 from Wickenburg south to Casa Grande. There, the southern options are east or west of I-10, connecting to Arizona 189 in Nogales with access to the international port.

An earlier proposal by Pima County had I-11 connecting to the existing Interstate 19 for southbound travel.