Sandoyartunnilin

Sandoyartunnilin (Sandoy Tunnel) is an undersea road tunnel in the Faroe Islands. It connects the main island of Streymoy with Sandoy to the south. The length of the tunnel is 10.8 km and the estimated cost is 860 million DKK. The tunnel opened for traffic on 21 December 2023, after which the ferry Teistin ceased its route between Gamlarætt on Streymoy and Skopun on Sandoy. The tunnel crosses the Skopunarfjørður and runs from Gamlarætt to Traðardalur in central Sandoy, near the Inni í Dal stadium.

On 3 February 2022, the two sides of the tunnel were connected during a ceremony. Construction began on 27 June 2019 and the halfway mark was hit in September 2020.

In political, legal and financial terms, the project is linked to the Eysturoyartunnilin, which was opened for traffic on 19 December 2020. The Eysturoyartunnilin, at more than tenfold the traffic numbers than those projected for the Sandoyartunnilin, will partially finance the latter via cross subsidisation once the investment of the former has been returned. Toll levels of Sandoyartunnilin are pegged to those of the Eysturoyartunnilin. It was projected that 300–400 vehicles per day would use the tunnel to Sandoy. In comparison, the average daily ridership of the ferry route was 195 vehicles (with drivers) and 613 passengers (excluding drivers) in 2021. However, in February 2024, the first full month with tolls, 783 vehicles used the tunnel, and 919 in March, which is approximately twice the projected traffic volume. Also the other three sub-sea tunnels saw an increase in traffic. The ridership of the Sandoyartunnilin would be further increased if it can act as a stepping stone for the Suðuroyartunnilin, or new ferry route, to Suðuroy.

A new residential and industrial area is being built with tunnel debris at Velbastaður. Other debris has been used in Runavík and Strendur for new bypass roads.

Bus route 650 uses the tunnel on its daily service from Sandur to Tórshavn. On Sandoy, it connects with services to Skálavík, Húsavík, Dalur and Skopun, and in Tórshavn with various Bussleiðin and national routes. It also connects with the ferry service to Hestur in Gamlarætt and Skúvoy in Sandur.

The Farose Útoyggjafelagið ('Outpost Island Society') lobbied for a branch to the island of Hestur, but this was deprioritised due to costs. Ferry port Gamlarætt will therefore remain a ferry port for Hestur after the Sandoy route terminates.