16th Street Limited
| D6X | |||
|---|---|---|---|
| 16th Street Limited | |||
 | |||
 Route D6X on Pennsylvania Avenue near Federal Triangle in March 2026 | |||
| Overview | |||
| System | Metrobus | ||
| Operator | Washington Metropolitan Area Transit Authority | ||
| Garage | Montgomery | ||
| Status | In Service | ||
| Began service | March 30, 2009 | ||
| Predecessors | S9 | ||
| Route | |||
| Locale | Northwest, Montgomery County | ||
| Communities served | Silver Spring, Columbia Heights, Downtown, Federal Triangle | ||
| Landmarks served | Silver Spring station, Shepherd Park, Brightwood, Carter Barron Park & Ride Lot, Crestwood, DC USA, Columbia Heights station, McPherson Square station, Franklin Square, Metro Center station, Federal Triangle station | ||
| Start | Silver Spring station | ||
| Via | 16th Street NW | ||
| End | Federal Triangle | ||
| Other routes | D60 16th Street Local | ||
| Service | |||
| Level | Daily | ||
| Frequency | 6-12 minutes (Weekday Peak Hours) 12 minutes (Weekday Middays, Saturdays and Sundays between 7:00 AM and 9:00 PM) 15 minutes after 9:00 PM | ||
| Operates | Weekdays: 5:00 AM – 12:00 AM Weekends: 5:48 AM – 12:00 AM | ||
| Ridership | 2,092,059 (FY 2025) | ||
| Transfers | SmarTrip only | ||
| Timetable | 16th Street Limited Line | ||
| |||
The 16th Street Limited, designated Route D6X, is a daily limited stop Metrobus bus route operated by the Washington Metropolitan Area Transit Authority between Silver Spring station, which is served by the Red Line of the Washington Metro, and Federal Triangle in Downtown Washington, D.C. The line operates every 5–12 minutes during rush hours, 12 minutes during weekday middays, Saturdays and Sundays between 7AM and 9PM and 15 minutes after 9PM. Trips are roughly 30–40 minutes long. This line provides additional service along the 16th Street corridor, supplementing route D60.