Five separate crashes have claimed the lives of five people in a deadly 12 hour stretch on southern B.C. roads.

The driver of a black GMC Jimmy was killed around 3:30 p.m. Thursday when his vehicle became pinned underneath a large farm truck near Wells Line Road and Inter-Provincial Highway in Abbotsford.

The driver and passenger of the farm truck were uninjured.

Around two hours later, the driver of a small vehicle was killed when the car plunged more than 60 metres down an embankment over the side of the Emory Creek Bridge, south of Yale.

The 43-year-old victim has not been identified and it is not known what caused the car to go off the road. Authorities were trying to notify the man's family Friday afternoon.

And police are investigating a fatal crash between a small car and semi-truck in Agassiz just after midnight Friday.

It happened at the intersection of Haig Hwy. and Agassiz Rosedale Hwy.

Police say a Pontiac Sunfire was attempting to pass traffic heading northbound when the vehicle struck a tractor trailer head-on, killing the 31-year-old driver.

The 35-year-old passenger was air lifted to hospital with serious but non-life threatening injuries. Both people in the Pontiac are Agassiz-area residents. The truck driver was uninjured.

On Vancouver Island, two men died and a third was seriously injured in two motorcycle accidents in Nanaimo on Thursday.

The first occurred at 10:45 a.m. when a motorcyclist rear-ended a car driven by a 91-year-old man who appeared to be in medical distress. The 29-year-old motorcycle driver is in intensive care at Victoria General Hospital.

And a 53-year-old Nanaimo man was killed after losing control of his motorcycle while making a turn on Highway 19 and crashing into a street sign around 2 p.m.

The driver sustained serious injuries and was pronounced dead approximately four hours later.

Ted Emanuels of the RCMP Lower Mainland District Traffic Services told CTV News the Fraser Valley is experiencing "an unacceptable number" of traffic fatalities.

"I urge the public to be part of the solution. Buckle up, slow down and drive as if your life depended on it."