Via Claudia Augusta

The Via Claudia Augusta was a Roman Road completed in c.46 CE, that ran across the Alps between Italy, Austria and Germany. It is now used as a cycle Route to cross the Alps.
The road ran from Altinum in Italy via the Reschen Pass and Fern Pass in Austria to reach Augsburg in Germany. A later road ran through the Brenner Pass.

Building began in 15 BCE under Augustus and took 60 years to complete.
General Drusus the Elder, Augustus‘ adopted son, built the road to send armies into Raetia, Vindelicia and Noricum.
In 46 or 47 CE it was completed under Claudius, Drusus’ son.

The road was 434 miles (700km) long, linking Italy and the Po valley through Austria to Germany, via the Fern Pass and Reschen Pass.
It had two branches, one started at Ostiglia on the River Po, the other started at Altinum on the Adriatic. The two roads united at Trento (Tridentium), then crossed over the Alps using the Passes to reach Augsburg (Augusta Vindelicorum).
Later in the second century CE, a Roman Road was also laid through the Brenner Pass.

Reschen Pass