Hughes, in a short story "Vacation '58" which later became the film "National Lampoon's Vacation": "Mom pleaded with Dad to stop at a motel when we got to Springfield, Illinois. Several times he crossed completely over the median lines and drove in the opposite lane. Once, while going through a little town, Dad drove up on the sidewalk and ran over a bike and some toys. Mom accused him of being asleep at the wheel, but he said he was just unfamiliar with Illinois traffic signs."
AP