Two Lexington residents were involved in an accident Wednesday night.  The crash occurred on Higginsville Road, south of Highway 24, at about 7:45 p.m.  The Highway Patrol reports Hayden Grass, 18, failed to negotiate a curve.  He traveled off the road and overturned into a creek.  Grass was transported to Lexington Regional Hospital with moderate injuries.  His passenger, William Holloway, 21, refused treatment for minor injuries.