From NBC10 Pennsylvania:
A motorist who was hit and killed when he got out of his car after a minor accident, set off a chain reaction crash involving about 50 cars. The multi-car crash closed the westbound lanes of the Pennsylvania Turnpike from Downingtown to Morgantown as a storm brought heavier snow than expected to the region.
It was the largest among many crashes reported across the region today as drivers and road crews were caught off-guard by the intensity of the snowfall. Hazardous conditions caused multiple fender-benders which also shut portions of I-95 in Philadelphia today as well as the Platt Bridge which is a major artery to and from Philadelphia International Airport. All planes at PHL were grounded during the late afternoon.
Instagram user terrigsgold has several photos from another scene here.