Interstate 11 could someday be a major thoroughfare linking Phoenix and Las Vegas.
I-11 would consist of 225 miles of improved U.S. 93 with about 150 miles of new freeway around the Phoenix area.
Backers say it would strengthen the link between two of the fastest growing cities in the U.S. while becoming a prime route to transport freight from Mexico to Las Vegas and beyond.
Still to come, how to pay for the route.
Recently, Gov. Jan Brewer signed a law allowing the state to enter partnerships with the private sector in what may be the first step in creating toll roads in Arizona.
Some feel that freight haul operators would pay a toll to use an Interstate 11 to bypass Phoenix congestion.