Update at 5:30 p.m. — The pinned vehicle occupant has been removed and is being transported to the trauma center at Inova Fairfax Hospital.

Update at 5:40 p.m. — One westbound lane of Route 50 has been reopened, but commuters should expect very heavy traffic in the area.

Earlier: The westbound lanes of Route 50 are reportedly blocked due to an accident involving an overturned vehicle.

The accident occurred at the intersection with Park Drive, near the Arlington Forest Shopping Center. One person is trapped in the overturned vehicle and is in the process of being extricated by firefighters and transported to the hospital.

Drivers in the area should expect traffic impacts.