In early 2014 all political parties of the Løgting agreed to the construction of two tunnels: Eysturoyartunnilin, a tunnel connecting Eysturoy and Streymoy, which was completed in 2020, and Sandoyartunnilin, a tunnel connecting Streymoy and Sandoy, will be completed by 2023. The combined cost of the project is estimated at almost 3 billion DKK, and will be the most expensive construction project in Faroese history. Eysturoyartunnilin has the world's first under-sea roundabout. Its three tubes are 7.1 km, 2.1 km and 1.8 km long, linked together by the roundabout. Sandoyartunnilin will be 10.6 km long.