Four people were taken to hospital Friday night after a four-vehicle crash on Highway 1, eastbound near the Sumas Way off-ramp in Abbotsford.
The collision occurred at about 5:45 p.m. When emergency crews arrived, several people had to be extricated from vehicles.
RCMP Sgt. Peter Thiessen said a 50-year-old driver from Chilliwack suffered a medical emergency, causing his vehicle to go out of control and crash into several other cars. He was airlifted to hospital with serious internal injuries and is expected to survive.
A 44-year-old woman and two men, ages 48 and 57, sustained minor injuries and were transported to hospital by ambulance.
The crash dislodged a section of guard rail, which plummeted onto Sumas Way beneath the overpass.
The freeway was closed while police investigated, and traffic was diverted via McCallum Road.