Of the total 60 km of exploratory tunnel of the Brenner Base Tunnel., 38 km (2/3) have been excavated so far; 21 km of which in the Austria.
On March 29, 2019, the last ground breaking ceremony of the "southern stretch of the exploratory tunnel" was held underneath the residential area of Wolf, part of Steinach am Brenner. 5.5 km of tunnel will be excavated southwards to the Brenner with the drill & blast method.
About 10 km of exploratory tunnel are still to be excavated from Trens (Alto Adige) northwards up to the Brenner.
The breakthrough of the exploratory tunnel at the Brenner will take place between the end of 2022 / beginning of 2023.