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The Brown Line (formerly route 52) was a branch of the Pittsburgh Light Rail system that ran from South Hills Junction over Mount Washington and across the Monongahela River to downtown Pittsburgh, terminating at Gateway Center. It included the steepest grade of any section of the Pittsburgh light rail system, of approximately 10 percent. ==History== The 52 Allentown route was created in 1984 by renaming what was then the ''49 Arlington-Warrington'', itself created in 1971 by combining portions of the ''48 Arlington'' and ''49 Beltzhoover'' lines.〔(【引用サイトリンク】title=Pittsburgh Railways Online - Trolleys: Back from the Brink )〕 In April 2010 the 52 Allentown was rebranded the "Brown Line" by the Port Authority. Prior to being discontinued, Brown Line service was severely reduced, operating only during Monday to Friday rush hours, with bus route 44 substitute providing service at other times. The Port Authority considered ending all Brown Line service, but this would have provided only limited savings unless the tracks and overhead wires were also decommissioned. More importantly, however, the Brown Line's tracks provided an alternate route when the Mt. Washington Transit Tunnel was closed (either due to planned maintenance or a stalled vehicle), allowing Red Line or Blue Line services to continue operating, albeit behind schedule since the Allentown routing took five to eight minutes longer〔http://www.portauthority.org/PAAC/apps/pdfs/42S.pdf〕 than via the tunnel. On March 27, 2011, the Brown Line service was withdrawn due to a system-wide 15% service cut.〔http://www.portauthority.org/PAAC/tabid/538/Default.aspx〕 The line is still used occasionally when the Mt. Washington Transit Tunnel is closed 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Brown Line (Pittsburgh)」の詳細全文を読む スポンサード リンク
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