State police say it happened at 8:00 p.m. Monday as the trooper was assisting a motorist on northbound I-95 near the Tacony Palmyra Bridge.
The trooper was in the motorist's disabled vehicle when the vehicle was struck from behind by an oncoming car.
The trooper, a man in his 70s and a man in his 30s were all taken to the Frankford campus of Aria Health.