Euro 1 minimum standard
on Mondays, Wednesdays and Fridays 08:30 - 18:30.
Most likely a winter ZTL will come into place like last year. Minimum standard then was Euro 4.
All vehicles Euro 0, including motorcycles & mopeds Euro 1
All the municipality of Naples.
Has signs similar to this, a banned vehicle sign with the requirements below:
On Mondays, Tuesdays, Wednesdays and Fridays 09:00 - 12:30 and 14:30 - 16:30.
An administrative fine of between 71.05 and 286.38 Euros
There is currently no Italian national scheme, but regional as well as individual city schemes.
Zona a Traffico Limitato (ZTL) or Limitazioni della circolazione, the general name for all access regulation schemes, also used for Low Emission Zones.