The Mayor of Tempe, Arizona, is advocating widening Interstate 10 from Tempe to East Phoenix to 12 lanes in each direction.
"State transportation officials are considering widening a section of Interstate 10 in metropolitan Phoenix to 24 lanes, a configuration that would be unique in the state.
The first phase of the project would cost an estimated $550 million and double the width of I-10 from U.S. 60 in Tempe to just south of Sky Harbor Airport in east Phoenix. The second phase could would widen the freeway all the way to Interstate 17 and bring the project total to $1.3 billion.
The Maricopa Association of Governments, which coordinates freeway-construction money in the region, has money to begin the first phase by 2012."