(MT. VERNON, IL) — An early morning rollover on the I-64 westbound ramp has sent one person to the hospital. According to authorities, a semi truck rolled over on the ramp at approximately 6 a.m. this morning. Mount Vernon Police Department, Jefferson County Sheriff’s Office, Illinois State Police, and Jefferson Fire Protection District initially responded to the scene with the report of unknown injuries. A person involved in the accident was sent to Good Samaritan Hospital with unknown injuries. Authorities report that the ramp will be closed until cleanup of the scene is complete, which is expected to be Thursday afternoon.