The National Transportation Safety Board's brief report outlined what happened on June 11, when an elevated section of Interstate-95 collapsed after the tanker truck caught fire underneath it. It largely confirmed what state officials said earlier.
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The truck, which was a combination vehicle composed of a truck tractor and a tank trailer, was hauling 8,500 gallons (about 32,200 liters) of gasoline from Wilmington, Delaware, to a gas station located on Oxford Avenue in Philadelphia, according to the report. It was operated through an affiliate carrier leased to Penn Tank Lines.
SEE ALSO: I-95 reopens to traffic with temporary lanes 12 days after collapse, tanker fire
I-95 reopens to traffic with temporary lanes 12 days after collapse, tanker fire
Nathaniel Moody, who was killed in the crash, exited I-95's northbound lanes at Cottman Avenue on a curved off-ramp that was posted with 25 mph (about 40 kph) speed limit and truck rollover warning signs, officials said in the report. The driver was unable to keep control of the vehicle, and it rolled over and caught fire.
The fire caused the northbound lanes to collapse onto the Cottman Avenue off-ramp, and damaged the southbound lanes.
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The National Transportation Safety Board was on the scene the night of the crash, collecting information about the truck and talking with the company and emergency responders in order to understand the sequence of events. It continues to investigate the crash and collapse.
An interim six-lane roadway was constructed in less than two weeks, with crews working around the clock to get traffic flowing again on what is a heavily traveled section of the East Coast's main highway. The damaged I-95 segment carries about 160,000 vehicles daily, state officials said.
Workers used about 2,000 tons (1,814 metric tons) of lightweight glass nuggets to fill the underpass and bring it up to surface level, then paved over to create three lanes of travel in each direction. The temporary section has no shoulders and slightly narrower lanes, and is posted at 45 mph (about 72 kph).
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The Associated Press contributed to this report.