Three people were injured Monday evening in a commercial truck and trailer accident on westbound Interstate 84 just east of Corbett that resulted in the truck leaving the roadway, crashing through a guardrail, and rolling down a steep embankment before landing on its side along the shore of the Columbia River.  Initial investigation by the Oregon State Police shows 52-year-old Suzanne Brault of Quebec, Canada had been driving the truck and traveled out of the right-hand lane onto the shoulder as she was checking her side mirror, and then struck a parked SUV that had run out of fuel, leading to the going through the guardrail.  Brault and two Portland men in the SUV, 53-year-old Patrick Sheehan Jr. and 47-year-old Addison Blackmon III, were taken to hospitals with non-life threatening injuries.  The freeway was restricted to one lane of travel for about three hours.