page_title: US Standard Light Rail Vehicle
section_title: Muni
hierarchical_section_title: US Standard Light Rail Vehicle / Replacements and retirement / Muni
caption_attribution_description: English: An old Boeing LRV (left) and a new Breda LRV laying over at Balboa Park in May 1997
context_page_description: The US Standard Light Rail Vehicle was a light rail vehicle built by Boeing Vertol in the 1970s. The Urban Mass Transportation Administration of the U.S. Department of Transportation 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 US 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 US 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.
context_section_description: Muni began developing plans to procure replacements for the Boeing SLRVs in 1989. A contract was signed with Italian manufacturer Breda Costruzioni Ferroviarie on December 4, 1991, with an initial order of 35 cars and options for 20 more. San Francisco began retiring their Boeing SLRVs in 1995 after the first of their replacements (designated LRV2) arrived from Breda. The newer Breda cars are more like what Muni wanted for its Muni Metro back in the early 1970s, before the design of the Boeing SLRV.
  At the end of 2001, Muni retired the last of their Boeing SLRVs after the LRV2s had proven to have improved reliability on the Muni Metro system.
caption: Boeing SLRV (LRV1) and Breda LRV2 at Balboa Park station (May 1997)
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