The violent crashes around 11:30 p.m. Thursday caused havoc in the northbound lanes of the highway near the County Line Road overpass in Lower Merion Township.
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It began when, in a single vehicle accident, a Jeep crashed into a right shoulder guard rail. Then the drivers of two vehicles, including that of a tractor trailer, stopped to help.
Then, moments later, a box truck caused a chain reaction crash when it hit a Hyundai, pushing it into the two vehicles that were stopped.
The driver of the Hyundai , a 19-year-old woman , was trapped under the box truck. Emergency crews freed her from the wreckage and she was taken to the hospital by helicopter.
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The northbound lanes of the Blue Route remained shut down until just after 5 a.m. Friday.
State police charged the driver of the truck that caused the second accident with a summary violation for failing to drive at a safe speed.
Troopers have not said if they believe alcohol or drugs were a factor.