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US Standard Light Rail Vehicle
A Boeing Vertol US SLRV in service for the San Francisco Municipal Railway in 1980, on the then-newly opened Muni Metro
In service
1976-1998 (MUNI) 1976-2007 (MBTA)
Constructed
1976–1979
Entered service
1976–1984
Scrapped
1987–2012
Number built
275
Capacity
seated 52 (MBTA, later reduced to 48 to provide room for wheelchairs) or 68 (Muni), with crush load of 219
Specifications
Car length
71 ft (21.64 m)[1]
Width
8 ft 10+1⁄4 in (2,699 mm)[1]
Height
11 ft 4 in (3.454 m)[1] ATOR
Floor height
34 in (86.4 cm)[1] ATOR
Maximum speed
50 mph (80.5 km/h) with multiple units
Weight
67,000 lb (30,391 kg)[1] empty
Traction system
2 powered trucks, each with monomotor, 210 hp (157 kW), 152 kV, 280 V DC, 600 A
Acceleration
3.1 mi/h/s (1.4 m/s/s)[1]
UIC classification
Bo’2Bo’
AAR wheel arrangement
B-2-B
Braking system(s)
Air/Hydraulic NY Air Brake
Track gauge
4 ft 8+1⁄2 in (1,435 mm) standard gauge
The US Standard Light Rail Vehicle (SLRV) was a light rail vehicle (LRV) built by Boeing Vertol in the 1970s. The Urban Mass Transportation Administration (UMTA) of the United States Department of Transportation (USDOT) promoted it as a standardized vehicle for U.S. cities. Part of a series of defense conversion projects in the waning days of the Vietnam War, the SLRV was seen as both a replacement for older PCC streetcars in many cities and as a catalyst for cities to construct new light rail systems. The US SLRV was marketed as and is popularly known as the Boeing LRV or SLRV, and should not be confused with their prior lunar roving vehicles for NASA.
The SLRV was purchased by the public transportation operators of Boston and San Francisco; in service by 1976, the US SLRV proved to be unreliable and scrapping started as early as 1987, but the SLRV were not completely replaced in both systems until 2007. Although the SLRV itself was not successful due to poor reliability, it did set the general size and configuration for succeeding LRVs in the United States.
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