Officials partially shut down the 14 Freeway on Saturday after an early morning crash involving a construction truck left two women in their 60s dead, authorities said.
The California Highway Patrol received a call about an incident on the northbound side of the highway near Palmdale Boulevard just after 5 a.m.
A Toyota Highlander had been involved in a minor, rear-end crash with another vehicle, the agency said.
Just as the two parties were proceeding to exchange information, the driver of the Toyota—for unclear reasons—sped off and crashed about half a mile away into the back of an attenuator truck within a closed construction zone on the right shoulder of the freeway, according to officials.
Attenuators are designed to absorb force during crashes. Still, authorities believed the impact killed the driver, a 60-year-old woman from Antelope Valley, and her passenger, a 68-year-old woman from the Philippines.
Witnesses estimated the SUV to be going about 90 mph, CHP Sgt. Steven Geraty told KTLA.
The vehicle, its roof detached from the collision, then hit a wall on the side of the highway. The Toyota and the construction truck remained at the site as of 7 a.m., footage shows.
The right two lanes of the northbound 14 Freeway between Palmdale and Rancho Vista boulevards were blocked as investigators and clean-up crews attended to the scene late into the morning.
The SigAlert issued at 5:32 a.m. was cancelled shortly before 11 a.m.
Authorities provided no further information.