VIDEO: The Department of Public Safety said the Interstate 17 southbound reopened just before 10 p.m. on Sunday following a major crash involving two dozen vehicles. The agency had hoped to get one lane on the southbound side back open around 5 p.m. but that didn't happen. The collisions occurred just before 1:30 p.m. The southbound lanes were closed at Sunset Point. About 24 vehicles were involved after a cattle hauler unable to stop plowed into them, Arizona Department of Public Safety troopers said. A total of 17 people were taken to hospitals. Four people were flown to hospitals with moderate to serious injuries, DPS said. The crash turned the freeway into a parking lot. The I-17 is usually busy on a Sunday to begin with due to people coming back to the Valley from the high country.