Since the opening of the tunnel, the Val Mesolcina, one of the Italian-speaking southern valleys of Graubünden, is now connected all-year round with the rest of the canton.

[1] The San Bernardino Tunnel is part of the A13 as a single-carriageway freeway and therefore passes through one bore without a central physical structure.

As there is only one lane per direction, overtaking (passing other vehicles) inside the tunnel is not permitted.

[citation needed] The old name Vogelberg may refer to the migratory birds who pass by here every year in large flocks.

From today's perspective, the roadway is very tight, and the ventilation systems did not meet modern requirements.