Interstate 15
Interstate 15 is an interstate highway in the western United States. Like other "interstates," it is commonly referred to as I-15. Its odd number indicates that it is primarily a north-south highway. It goes from San Diego, California just south of Interstate 8 (where it becomes California State Route 15) to Sweetgrass, Montana at the Canadian border. North of its junction with California State Route 91 in the Inland Empire near Corona, the route follows (roughly) the old US Route 91.It is possible that this highway may be extended south to Interstate 5 along CA 15 to Barrio Logan, California in the future. Note there are three spurs identified as I-215: in the Inland Empire region of California; Las Vegas, Nevada; and Salt Lake City, Utah. In the Inland Empire it is referred to as the Ontario Freeway.
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2 Major Cities Along the Route 3 Intersections with other Interstates 4 Spur Routes 5 Notes 6 Reference |
At the time it was built, the section running through the northwest corner of Arizona (the Virgin River gorge) was the most expensive section (per mile) of the entire interstate system.
Length
Major Cities Along the Route
Intersections with other Interstates
Spur Routes
Notes
Managed Lanes Project- Initated during fall 2003 and will finished late 2007. Portion of CA-56 to Centre City Pkwy (former US 395). More info in "reference" section.Reference