The last time before Friday, he said, was 2008, when a three-vehicle accident sent a chicken-filled 18-wheeler through a concrete wall and into the water, killing the driver, John Short of Willards, Md.
Another motorist died in an accident in 2011, after his car broke down on the bridge. He stepped out of the vehicle, which was subsequently struck by a truck. The force of the crash sent Harry Blauvelt, a retired sportswriter, into the water.
Washington Post staff writers Julie Tate and Julie Zauzmer contributed to this report.