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Tangenziale di Venezia
The ''Tangenziale di Mestre'' (Mestre beltway), or Autostrada A57, was opened to traffic on 3 September 1972 in northern Italy.
==Overview==
The original design was to have a central dual carriageway as the Autostrada A4 (motorway A4), and alongside a separated single carriageway to serve as a local beltway (similar to what was built around Bologna): but, high costs for a motorway that was not then expected to carry much through traffic (east of Venice, it could go only to Udine and Trieste which latter was at that time the border with the Iron Curtain). The opposition of conservationist groups to a double dual carriageway running inside a city caused the plan to reduce to a single dual carriageway section instead, serving both as Autostrada A4 and localbeltway.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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