The crash occurred when the driver, Cynthia Yvette Rodriguez, 27, lost control around 11:30 a.m. on the northbound side near Tinicum Township, Pennsylvania State Police said.
Rodriguez and the girl -- of Ridley Park -- were both ejected. The girl was pronounced dead at the scene while Rodriguez was hospitalized with serious injuries, police said.
Meanwhile, another woman, 34, and four children ages 10, 9, 6 and 2 months, suffered non life-threatening injuries, authorities said.
Rodriguez and the girl were both unbuckled, according to a Pennsylvania State Police report.
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