Car overturns on Highway 17 south of Richmond Hill Traffic is blocked on northbound Highway 17 south of Richmond Hill after a car overturned just south of the Parker's gas station. - photo by Susan Nelson A car overturned on northbound Highway 17 south of Richmond Hill, just south of the Parker's gas station, a short time ago. Police, paramedics and fire units are on the scene. Expect traffic delays and avoid the area if you can. Sign up for our E-Newsletters