Tjeldsundet is the sound or strait that is located between the island Hinnøya and mainland Norway in the northern part, and in the southern part it is between Hinnøya and Tjeldøya island. Tjeldsundet has been an important waterway for more than 1,000 years and was well known and used in the Viking Age.
The northern part is in Troms county between the municipalities of Harstad and Skånland, while the southern part is located in Nordland county between the municipalities of Tjeldsund and Lødingen. At the southern entrance to the strait is at the town of Lødingen, while the town of Harstad is located at the northern entrance of the strait.
The Tjeldsund Bridge connects Hinnøya to the mainland by the E10 road, also known as King Olav's Road (Norwegian: Kong Olavs vei), part of which goes from the city of Harstad to Harstad/Narvik Airport, Evenes.[1]