The accident happened along the Route 1 off ramp from I-95 northbound.
Police tell Action News that around 7:45 a.m. an SUV rear-ended a tractor trailer, wedging the SUV underneath the big rig.
It took about 30 minutes to get the SUV out from under the truck. Then firefighters had to cut the occupant of the SUV out.
There's no word at this time what caused the accident.