(Pendleton, OR)  --  Two Portland-area women are being treated for injuries, following a crash in Pendleton.  Authorities say Shelley Whittaker of Portland was driving along I-84 Saturday night when she crashed into the back of a large vehicle.  Whittaker and her passenger, Tuesday Hailey of Hillsboro, were able to get out of the vehicle before it caught fire.  Police say Whittaker is listed in serious condition, and Hailey sustained less serious injuries.