Idaho State Police investigate deadly two-vehicle crash on I-184 in Boise

A late-night crash on Interstate 184 in Boise left one woman dead after a rear-end collision sent an SUV off the road and rolling back into traffic, Idaho State Police said. ISP is investigating the two-vehicle crash, which happened Sunday, June 21, 2026, at 10:59 p.m. near mile marker three on westbound I-184. Police said a white 2018 Acura TLX, driven by a 29-year-old man from Boise, was traveling westbound when it rear-ended a beige 2015 Toyota Highlander. The Toyota was driven by a 31-year-old man from Chandler, Arizona, and had four adult passengers, also from Chandler, police said. After the impact, the Toyota left the roadway and collided with concrete landscaping structures, according to ISP. The SUV then overturned and landed back in the lanes of travel. All occupants of the Toyota were taken by ground ambulance to a local hospital. A 49-year-old female passenger from Chandler died at the hospital, police said. Police said everyone in both vehicles was wearing seat belts. The westbound lanes of I-184 were closed for 3 hours and 45 minutes. ISP was assisted by the Boise Police Department, Boise Fire Department and Ada County EMS. The crash remains under investigation.