Specogna Bau AG[Construction]{Switzerland},PORR Group[Construction]{Austria},Walo Bertschinger[Construction]{Switzerland},Canton of Bern[Sponsor]{Switzerland}
项目状态:
Completed
开始时间:
2009
结束时间:
2017
项目说明:
October 2017 - Project opened to traffic; Project includes construction of 2 twin tunnels - Buttenberg Tunnel and Langholz Tunnel; Excavation of the first tube of the Buttenberg tunnel (west tube) started at the beginning of June 2009