The Nogales-Mariposa Port of Entry opened in 1973 to divert truck traffic away from the busy downtown Grand Avenue border crossing. It connects Arizona State Route 189 directly with Mexican Federal Highway 15D. All commercial traffic entering the United States at Nogales now enters through the Mariposa port of entry. The port facilities underwent a nearly $250 million renovation project between 2009 and 2014 to accommodate increasing traffic and to support new equipment and procedures.