The impact pushed White through a front window of the store.
The driver of the pickup truck, described as a woman in her 20s, was being questioned. But investigators said they believe White's death was accidental.
White served as a planning commissioner for 12 years before becoming a township supervisor. West Goshen, southwest of Philadelphia, is a town of about 20,000 that has been ranked by Money magazine as one of the best small towns in the United States.
"It's just a devastating loss for this township," Casey Lalonde, the township manager, told WPVI-TV. "He was intricately involved in this township. It's going to be an extreme loss for this township."