There is no Metro station in Georgetown. Some residents opposed building one but no serious plans for a station existed in the first place, primarily due to the engineering issues presented by the extremely steep grade from the Potomac River (under which the subway tunnel would run) to the center of Georgetown, very close to the river. The planners expected the Metro to serve rush-hour commuters, and the neighborhood has few apartments, office buildings, or automobile parking areas. Since the Metro's opening, there have been occasional discussions about adding another subway line and tunnel under the Potomac to service the area. Three stations are located roughly one mile (1.6 km) from the center of Georgetown: Rosslyn (across the Key Bridge in Arlington), Foggy Bottom-GWU, and Dupont Circle. Georgetown is served by the 30-series, D-Series, and G2 Metrobuses, as well as the DC Circulator. Another potential option for transportation in georgetown is scootering, with scooters provided by companies like Bird and Lime.