The first phase of the RTA plan is FY 2007 through FY 2011. The RTA is now in its fourth year of the first phase. During this period, the RTA recognizes the following major milestones to-date:
- Construction is under way on seven of the 11 first phase projects: Twin Peaks interchange, Silverbell Road to Interstate 10; and Camino de Manana widening from Tangerine Road to Linda Vista, in Marana. The frontage road, from Continental Road to Canoa Road, in Green Valley. The intersection improvement of Old Vail at Houghton Road as part of the Houghton corridor project in the City of Tucson. The Sahuarita Road widening from I-19 to La Villita in Sahuarita. Other projects under way are La Canada, Ina Road to Calle Concordia, and La Cholla, River to Ruthrauff, in Pima County. The Tanque Verde Road, Houghton to Catalina Highway, project in Pima County is currently out for bid. Bids are due Jan. 6.
- Expanded evening and weekend transit service.
- Expanded bus express service.
- New neighborhood transit circulator service in Green Valley/Sahuarita, Marana and Oro Valley/Catalina. The new service is called Sun Shuttle.
- The City of Tucson received a $63 million grant in February 2010 from the U.S. Department of Transportation to help fund its portion of the cost of the modern streetcar project, a $150 million project approved by voters as part of the RTA plan.
- Establishment of the MainStreet Small Business Assistance Program.
- Determination of the alignment for the RTA's largest roadway project ($167 million) on Grant Road.
- Completion (October 2009) of the first phase of a new Sun Tran Bus Storage and Maintenance Facility.