A four-mile stretch of Interstate 15 will be closed to all traffic every weeknight this week after 10 p.m., as construction work continues on a new interchange. The Utah Department of ...

UPDATE 9:05 A.M. Interstate 15 is now fully open at Mountain Pass between Baker and Primm. I-15 is now fully open at Mountain Pass between Baker and Primm. Both directions open.

The main stretch in Las Vegas' Interstate 15 will be closed for the weekend. The $305 million construction project is shutting down I-15 to demolish a large overpass in Nevada.

BLACKFOOT — A crash on Interstate 15 north of Blackfoot resulted in traffic backing up for a few miles and minor injuries. Idaho State Police Lt. Todd Orr told EastIdahoNews.com that the crash ...

Utah says widening Interstate 15 won't run afoul of federal air quality limits, but an Environmental Protection Agency loophole is keeping pollution projections barely within bounds.

SAN BERNARDINO (CBSLA) — California Governor Gavin Newsom Sunday announced plans to temporarily expand Interstate 15 between the California-Nevada state line and Barstow to ease traffic during ...

PHOENIX — A section of the Interstate 15 bridge, which was recently reconstructed near Beaver Dam in northwestern Arizona, is now fully open to traffic, transportation officials said.

Caltrans tells FOX5 that the I-15 pilot project debuted last weekend and the shoulder was used especially by truck traffic. NDOT says last Labor Day weekend, more than 200,000 vehicles crossed ...