A three-vehicle accident in the westbound lanes of Interstate 84 near Dalton Point Thursday afternoon involving a large truck and two sport utility vehicles snarled traffic and sent one person to a hospital with serious injuries. A Multnomah County Sheriff’s Office spokesman says the accident occurred between mileposts 67 and 68 at around 1 p.m. A person in one of the SUV’s…which flipped on its side…was taken by Lifeflight to a Portland area hospital…while the truck driver and people in a larger SUV were not injured. The crash briefly closed the freeway in both directions…with one westbound lane remaining closed through later afternoon.