The Jarlsberg Tunnel (Norwegian: Jarlsbergtunnelen) is a 1750-meter (5740 ft) long double track railway tunnel which runs through Frodeåsen in Tønsberg Norway. Located on the Vestfold Line the tunnel was built as part of the 7.8-kilometer (4.8 mi) double-track high-speed segment from Barkåker to Tønsberg. It is located just north of Tønsberg Station and runs between Frodegata and Tomsbakken. Most of the tunnel is blasted although 223 meters (732 ft) is in a concrete culvert.
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