For what it's worth, while some of the scenes were shot in
Italy, the final scenes, on the supposed run to the Swiss
border, were shot in Austria, on the secondary line that
goes north from Innsbruck into Germany.

Some of those final scenes that were supposidely on one
side or the other of a tunnel were actually shot several
miles apart on that line. (I have traveled that line
a number of times in the past, the last time in 2000,
including a much earlier engine cab ride.)

The line was electrified shortly after this movie was
made. And, yes, I think the movie is worth watching.

-- Ernest