Credit: The Potomac River Freeway, or simply the Potomac Freeway, is a short, sunken highway that runs between the Roosevelt Bridge and the Whitehurst Freeway behind the Kennedy Center and Watergate Hotel. It forms the eastern end of Interstate 66 in the District. (WTOP/Dave Dildine)

Thousands drive on this mystery DC freeway every day — but don’t know its name

Metro Board holds emergency safety meeting

FTA: Metro cars at risk for rolling away because brakes not used

Metro to crack down on nepotism, ethics for workers

Emergency drill to impact weekend Metro Yellow Line service

I-66 widening completed on time, on budget