The original bridge on this road was built in 3BC and it was a wooden structure which was swept in one of the floods.  The bridge was part of the Via Domitian road which was a quick way to connected Rome with the southern France.  The bridge was eventually replaced with an arched stone bridged with two openings allowing for high flood waters to pass through.  In 2005, after 2000 years of continual use the bridge was closed to car traffic to preserve it as a historic monument.