How to obtain traffic flow for taxi from shapefiles

AndreaMicrotek Registered Users Posts: 1
New Seeker
My company purchased shapefiles about the province of Naples in 2019. My customer has noticed that there are many mistakes about traffic flow. Now I have a doubt about how to derive the traffic flow for taxi from shapefiles.
Many road elements appear to have the ONEWAY filed set to 'N', which, according to the documentation at my disposal (Multinet Shapefile 4.8) indicates that the road element is closed in both directions, while talking to the customer and using googlemaps/streetview I observe that they are either one way or open in both directions. An example is Via Duomo (Naples) at number 164.Are there other tables I have to look at? In that case which are they and how do I have to interpret them?