The Brenner Base Tunnel - a new link through the Alps

11 Between Innsbruck and Fortezza two single-track main tunnels are planned at a distance of 40 to 70 metres from each other. Smaller tunnels connecting the two main tubes are located every 333 metres. They are used for logistics but also for emergency rescue. One special feature is the unbroken exploratory tunnel, which is located centrally twelve metres below the two main tunnels. The exploratory tunnel is meant for geological prospection, as a service and logistics tunnel during the construction phase and as a maintenance and drainage tunnel during the operational phase. Overall, the proposed tunnel system of the Brenner Base Tunnel is comprised of approximately 230 kilometres of tunnels. Each stage in the process requires careful planning and careful coordination. west tunnel east tunnel exploratory tunnel connecting tunnel 70m 333m Two large tunnels and a smaller one