http://abc7news.com/news/1-killed-after-truck-flips-onto-parked-car-in-martinez-driveway/570046/
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Other truck driver's at the scene say the purple tractor violated a fundamental safety rule by dumping a heavy load while facing down hill.
"Since the road is on a pitch, all the weight on the trailer was being heisted up in the air about 30 feet and rolled it over because the center of gravity was over the center of the axle on that truck," Hagerty said.