Lehigh County 9-1-1 center dispatched a rescue box for Rt. 309 southbound in area of Center Valley Parkway in Upper Saucon Township for a car under a tractor trailer.
Rescue companies arrived and found a Lexus under the trailer of the truck with a female driver severely pinned in the wreckage.
Southbound Route 309 was closed and one lane on the northbound side restricted. Crews worked for about 35 minutes to free the driver who was rushed to the trauma center in critical condition.