Completed a new diamond traffic interchange (interim connection to Loop 303 Freeway)
Regional Transportation Plan Phase I (2006-2010)
$30 million (construction)
The Lone Mountain Road interchange, which is approximately 2 miles south of SR 74 (Carefree Highway) will serve as the interim connection between I-17 and Loop 303 until completion of the freeway-to-freeway interchange. As part of the first five-year phase of the Regional Transportation Plan, Loop 303 is being extended west of I-17, initially as a four-lane divided highway.
Initial construction of the interchange concluded in spring 2010 as part of the I-17 project. The interchange will be fully completed and opened to traffic in 2012, when Loop 303 is connected to I-17 at this location.
Interstate 17 has been elevated by approximately 25 feet in this area to accommodate the future freeway-to-freeway traffic interchange.
Our Valley Freeway System is part of the 2004 voter-approved Regional Transportation Plan. We are working hard with our transit partners to implement the voters’ vision and are committed to quality, safety, open communication with our neighbors, and minimal inconvenience to the traveling public.