European route E45 in Sweden that it had several numbers. From south they were 45 (Göteborg-Grums), 234 (Grums-Mora), 81 (Mora-Östersund) and 88 (Östersund-Karesuando). Before the year 1985 the road Östersund-Karesuando had several numbers, 88, 343, 97, 98, 395 and 396. Before year 1962 the road Göteborg-Grums was called road 7. European route E45 in Sweden European route E45 in Sweden, previously Swedish national road 45, is a national road and the longest road in Sweden, with a length of 1,690 km (1,050 mi). It is one of the longest national roads in Europe. It covers the stretch between Gothenburg and Karesuando via Trollhättan, Vänersborg, Mellerud,
Siljan Ring an annular outcrop of Lower Paleozoic sedimentary rocks within Proterozoic granites of the Dala series. In Dalarna, the basement rocks consist of granites dated as 1.6 billion years old, putting them at the boundary between the Paleoproterozoic and the Mesoproterozoic. They were emplaced shortly after the Svecokarelian orogeny. The oldest sedimentary rocks that outcrop in the Siljan area are of Ordovician age. The sequence is dominated by limestone formations with one prominent black shale, the Fjäcka Shale, which is bituminous and has generated petroleum, sourcing the oil found in limestone cavities in the same area. The Ordovician sequence is overlain