A Unionville woman was killed in a two-vehicle accident along County Road 175 one mile west of Unionville around 8:50 last night. The State Highway Patrol reports a 14-year-old-boy was traveling westbound, crossed the center line and struck 20-year-old Holly Hydorn of Unionville head on. Hydorn was pronounced dead at the scene. The 14-year-old boy suffered moderate injuries and was transported to Unionville.