Virginia State Police say speed was a factor in a bus crash that injured about 36 people, most of them college students returning to school at the end of the holiday weekend. According to police, one person was seriously injured Sunday night when the charter bus overturned on an exit ramp in North Chesterfield County just south of Richmond. A charter bus carrying college students to three Virginia campuses overturned, leaving one person seriously injured and 35 others aboard with minor injuries near the close of the holiday weekend.