Alaska State Troopers are investigating the cause of a single-vehicle crash near 7 Mile Haines Highway which injured a 40-year-old woman and totaled her 1997 Subaru. According to troopers, Sarah Roark was traveling southbound about 9:15 p.m. when she lost control of her car and sideswiped a guardrail. The car then crossed the roadway and struck a cliff face. Emergency personnel responded and transported Roark to the Haines Clinic for injuries to her hands. She…