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The Betsy Ross Bridge is a continuous steel truss bridge spanning the Delaware River from the City of Philadelphia in Pennsylvania to Pennsauken, New Jersey. Built from 1969 to 1974, and opened in April 1976, during the American Bicentennial Year, it was originally planned to be named as the "Delair Bridge", after a paralleling vertical lift bridge owned by Pennsylvania Railroad (which is now used by Conrail and New Jersey Transit's Atlantic City Line), but was instead later named for Betsy Ross, a Philadelphia seamstress and reputed creator of the first American flag in 1776, making it the first automotive bridge named for a woman in America〔http://www.drpa.org/drpa/history.html〕 and the second bridge overall (after Iowa's Boone High Bridge was renamed the Kate Shelley High Bridge in 1912〔()〕). ==History== Construction began in 1969, and was completed in 1974. However, the bridge did not open to traffic until April 30, 1976〔〔http://www.phillyroads.com/crossings/betsy-ross/〕 due to numerous problems with the communities where the bridge's ramps to and from Richmond Street were located. The problems (concerns over traffic, especially heavy trucks) were also related to the highway route's planned extension to the northwest from the Delaware River, across Northeast Philadelphia to connect with the Roosevelt Expressway. The cancellation of this extension, the planned Pennsylvania Route 90 (PA 90 - known as the Pulaski Expressway) resulted in the so-called "Evel Knievel" ghost ramps – with unfinished bridges and fly-over ramps, some of which were later constructed to serve nearby Aramingo Avenue in the city's Bridesburg section. Currently, the route serves as a high-level multi-lane (six lanes, separated by a concrete median barrier) bypass of the three-lane Tacony-Palmyra Bridge, which has a drawbridge on the span. Construction in 1988 connected the bridge to New Jersey Route 90, allowing drivers to use NJ 90 to access Route 73, rather than via U.S. Route 130.〔("Delays Likely on Palisades Parkway" ), ''The New York Times'', June 5, 1988. Accessed October 12, 2007. "In South Jersey, there will be partial lane closings this month on Route 73, between Route 130 in Pennsauken and High Street in Maple Shade, for work on Route 90. The latter will connect the Betsy Ross Bridge across the Delaware River to Route 73 in Burlington County this fall. Bridge traffic must now go north on Route 130 in Camden County to reach Route 73 before continuing east."〕 The bridge has a total length of 8,485 feet (2,586 m), and a main span of 729 feet (222 m). Though originally constructed with eight lanes, the bridge was reduced to six lanes with two shoulders in 2000. The bridge is owned and operated by the Delaware River Port Authority. When approaching the exits from I-95 in Philadelphia for this bridge, drivers see signs referring to NJ Route 90. Beyond the toll plaza, which is on the New Jersey side, NJ 90 continues as an expressway with maximum speed limit of , and in a few miles ends with a merge onto southbound NJ 73. The toll plaza (westbound tolls only) is 12 lanes wide, and since 2000 has been a participating E-ZPass facility. 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「Betsy Ross Bridge」の詳細全文を読む スポンサード リンク
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