On the morning of July 20th, park dispatch received a report of a single vehicle motor vehicle accident near milepost 125 on the parkway. The driver, Walter Estes, 82, of Shannon, Mississippi, was killed when his 2007 Chevrolet truck left the roadway and struck a tree. There was no evidence of skid marks or braking prior to the accident. Rangers Joe Mangino and Patrick Gagnon responded. The cause of the accident remains under investigation.