Interstate 15 is an
interstate highway in the western
United States. It goes from
San Diego, California just south of
Interstate 8 (where it sputters out and becomes
California State Route 15[?]) to
Sweetgrass, Montana[?] at the
Canadian border. 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 Interstate 215's - in
Inland Empire, California;
Las Vegas, Nevada; and
Salt Lake City, Utah.