An unlisted medical condition was the cause of a one vehicle accident in Lafayette County just after 6pm Friday. According to the patrol report, Avis Smith, 59, of Foristell was Westbound on Interstate 70 near weigh station A-3, when she exited into the weigh station and blacked out. Smith impacted a concrete barrier. She received minor injuries, thanks to her seatbelt, and was transported to Centerpoint Medical Center.