Colesville Road Line
| M52, M54 | |||
|---|---|---|---|
| Colesville Road–Burtonsville Line Colesville Road–Greencastle Line | |||
Route Z8 at Briggs Chaney Park & Ride | |||
| Overview | |||
| System | Metrobus | ||
| Operator | Washington Metropolitan Area Transit Authority | ||
| Garage | Montgomery | ||
| Livery | Local | ||
| Status | In service | ||
| Route | |||
| Locale | Montgomery County, Maryland | ||
| Communities served | Silver Spring, Four Corners, White Oak, Fairland, Calverton, Burtonsville | ||
| Landmarks served | Burtonsville Crossing Park & Ride lot, Greencastle Park & Ride Lot, Fairland, Calverton, Westfarm, White Oak, Four Corners, Montgomery Blair High School, Paul S. Sarbanes Transit Center (Silver Spring station) | ||
| Start | M52: Burtonsville Crossing Park & Ride Lot South Laurel Park & Ride Lot (select peak hour trips only) M54: Greencastle Park & Ride Lot | ||
| Via | Briggs Chaney Road, Calverton Boulevard, Old Columbia Pike, Columbia Pike, Colesville Road | ||
| End | Silver Spring station | ||
| Length | 60 minutes | ||
| Service | |||
| Level | Daily | ||
| Frequency | 30 minutes (Both routes) | ||
| Operates | 4:30 AM - 1:30 AM | ||
| Ridership | 783,035 (Z6, FY 2024) 737,408 (Z8, FY 2024) | ||
| Transfers | SmarTrip only | ||
| Timetable | Silver Spring-Fairland Line | ||
| |||
The Colesville Road Line, designated as the Colesville Road–Burtonsville Line on Route M52, and Colesville Road–Greencastle Line on Route M54, are daily bus routes operated by the Washington Metropolitan Area Transit Authority between Burtonsville Crossing Park & Ride lot (M52) and Greencastle Park & Ride Lot (M54), and Silver Spring station of the Red Line of the Washington Metro. The line operates every 20-30 minutes at all times. Both trips are roughly 60 minutes long. These new routes replaced the Silver Spring–Fairland Line routes Z6 and Z8 as part of WMATA's Better Bus Network Redesign on June 29, 2025.