According to ISP, an adult male driver was traveling in a 1996 Honda Civic westbound near mile marker 18.2, just east of the Sand Hollow exit, when he drove the vehicle off the road toward the right shoulder and over-corrected, resulting in a rollover crash.
A 19-year-old female passenger, still unidentified, died at the scene. The driver was transported by ground ambulance to Saint Alphonsus Regional Medical Center in Boise. ISP said neither occupant was wearing a seat belt.
The crash blocked all westbound lanes for nearly three hours, but all lanes were reopened before sunrise. The investigation into the crash is ongoing.