New development around Foggy Bottom’s already bursting Metro station isn’t enough to get a badly needed second station entrance built, unlike its counterpart in Rosslyn.

The Foggy Bottom station is the eighth-busiest one in the system and handles more than 40,800 passengers per day — more than Baltimore’s entire light rail system. Yet it’s the only one of those eight that is served by a single entrance, creating problems of safety and efficiency that a Metro study said will only get worse over time.