At 1719 hrs Engine 371 along with surrounding units were dispatched to the Capital Beltway and Central Ave. for a MVA. Engine 371 arrived to find two vehicles that had rolled over. It was determined that two of the patients were priority ones and needed to be flown out. The inner loop of the beltway was shut down so both Troopers 2 and 8 could land at the scene. The Troopers transported the priority ones while the other 2 patients were taken by land to a local hospital. Engine 371 cleared in just over 30 minutes.