The northbound Chevrolet van drifted off the side of I-95 near the split with U.S. Highway 64 at about 1 a.m., hit a guardrail and flipped over several times, authorities said.
Jack Kazanjian, 75, who was driving, and his 44-year-old son, Elias Kazanjian, both of Philadelphia suburb Broomall, Pa., were pronounced dead at the scene, authorities said. Neither man was wearing a seat belt, authorities said.
Traffic was backed up for several hours while crews worked to clear the wreckage from the highway.
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