This part of the Via Appia Antica is really strange. The GPS (and thus also this map) considers it a two-way road. However if you approach it from the roundabout on the Porta Urbica there's a C2 traffic sign (the red one with a horizontal white line in the middle). Strangely enough, I also recall seeing this exact same C2 traffic sign when approaching this road from the Via Romana/Via Colle Fiorito 5the triangular road at the east site). I assume it's just closed off for non-inhabitants. I can't guarantee that I can scout out the street any further so I ask if someone can do this instead. If I do seem to find the time I will update this note.

Here's a tobacco store called "Tabaccheria CT7)

Source: been there

Questa strada chiama Via Canonico Michele Agresti o Can. M. Agresti