. . "40.775555555555556 29.908333333333335" . . "ca. 55,000"@en . . . . "Operational"@en . "G\u00FCltepe Tunnel"@en . "51315957"^^ . "The G\u00FCltepe Tunnel (Turkish: G\u00FCltepe T\u00FCneli), is a motorway tunnel constructed on the Istanbul\u2013Ankara motorway O-4 E80 in Kocaeli Province, northwestern Turkey. It was opened to traffic in 1984. It is situated on the G\u00FCltepe Hill west of \u0130zmit. The 639\u2013584-metre (2,096\u20131,916 ft) long twin-tube tunnel carries two lanes of traffic in each direction. The tunnel was constructed in the 1980s. During the 1999 \u0130zmit earthquake, the tunnel was light damaged. In 2012, the tunnel's both tubes were reinforced. In the time period of 2013\u20132014, the tunnel was modernized for traffic safety. Around 55,000 vehicles pass through the tunnel in both directions daily."@en . "G\u00FCltepe, \u0130zmit, Kocaeli, Turkey"@en . . . . . . "POINT(29.908332824707 40.775554656982)"^^ . . "automotive"@en . . . "(G\u00FCltepe T\u00FCneli)"@en . . "80.0"^^ . "2"^^ . "29.90833282470703"^^ . . . . . "G\u00FCltepe Tunnel"@en . . . . . . "3148"^^ . . "2012-12-22"^^ . . . . . . . . . . "Operational" . . "G\u00FCltepe Tunnel westbound ."@en . . . . . . . "2"^^ . "40.77555465698242"^^ . "(G\u00FCltepe T\u00FCneli)"@en . . "The G\u00FCltepe Tunnel (Turkish: G\u00FCltepe T\u00FCneli), is a motorway tunnel constructed on the Istanbul\u2013Ankara motorway O-4 E80 in Kocaeli Province, northwestern Turkey. It was opened to traffic in 1984. It is situated on the G\u00FCltepe Hill west of \u0130zmit. The 639\u2013584-metre (2,096\u20131,916 ft) long twin-tube tunnel carries two lanes of traffic in each direction."@en . . "1078852620"^^ . . . "G\u00FCltepe Tunnel"@en . . . . .