Interstate 15

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.

Table of contents

1 Number of Miles
2 Major Cities Along the Route
3 Intersections with other Interstates
4 Spur Routes
5 Note
6 Reference

Number of Miles

California - 292 miles
Nevada - 122 miles
Arizona - 29.40 miles
Utah - 402 miles
Idaho - 195 miles
Montana - 397 miles
TOTAL: 1435

Major Cities Along the Route

Intersections with other Interstates

Interstate 8 in San Diego, California
Interstate 10 in Ontario, California
Interstate 40 in Barstow, California
Interstate 70 in Cove Fort, Utah
Interstate 80 in Salt Lake City, Utah
The western Interstate 84 in Ogden, Utah. They stay merged until Tremonton, Utah.
The western Interstate 86 in Pocatello, Idaho
Interstate 90 in Butte, Montana. They are merged for 9 miles.

Spur Routes

Inland Empire, California - I-215
Spur to Henderson, Nevada outside Las Vegas - I-515
Beltway (Under Const.) Las Vegas, Nevada - I-215
Salt Lake City, Utah - I-215
Butte, Montana - I-115
Great Falls, Montana - I-315

Note

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

http://www.ihoz.com/

http://www.dot.ca.gov/dist11/facts/I-15managed.pdf