Giffords was cited by several speakers during early ceremonies as a key supporter of the Tucson streetcar project, now dubbed Sun Link, prior to her arrival, and credited with helping secure $63 million in federal funds for the 3.9-mile, $177 million line.
"She spent a lot of time in getting the Department of Transportation to approve it and appropriate the money to build this," Kelly told local media. "It's a big deal for the city."
Officials this week will be testing their first car, which arrived last week from United Streetcar, LLC’s Clackamas, Ore., facility.
Giffords survived a shooting incident at a constituents meeting in January 2011 that killed six and wounded 12 others, but subsequently stepped down from congressional office a year later.