I know this probably is a stupid question but here goes.
When we were in Rome ( 6 yrs ago) we went to a Catacomb on a bus on what we thought was the Appian Way. This was a narrow street that cars and buses traveled. . In videos we see an Appian Way where people are walking or on Bicycles . Are these parallel roads or different areas in Rome ? Not sure how we missed the one where everyone was walking.