A woman was killed Sunday in a single-vehicle accident in Buckingham County. The victim is identified as 26-year-old Christine E. Coleman of Scottsville. State Police say Coleman was driving a car that went off Route 20 near Route 747 in northern Buckingham County at around 11:30 Sunday morning. The car hit a guardrail on one side of the road and went over to the other side where it overturned and struck a tree. Police say Coleman was not wearing a seat belt.