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Investigators said driver Kaseem Smith was distracted for a moment and hit an inside wall twice. When he overcorrected, the truck smashed through the guardrail, flew off the exit ramp and crashed into a parking lot 100 feet below.

"He basically focused on something else, so he is driving carelessly. He collides twice with the wall, and that's when he overreacts," FHP spokesman Joe Sanchez said.

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Smith was thrown from the cab and taken to Jackson Memorial Hospital. His family says it's a miracle that he survived.

Smith received two citations for careless driving and not wearing a seatbelt.

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Waymo autonomous vehicles operate across 65 square miles inside I-285 and have been involved in six incidents with Atlanta Public School buses since May. Waymo issued a recall because of their cars briefly stopping or slowing down before continuing forward while a bus was stopped and flashing its lights. (Courtesy of Atlanta Public Schools)

Credit: Courtesy of Atlanta Public Schools