Italy

There are schemes in 6 northern Italian provinces, covering many cities and towns within the area as well an additional scheme in Milan and a separate scheme in Palmero, Sicily. Minimum standards are set by an agreement between these provinces, and the cities implement at least these standards and times. Many, but not all, are only in operation for part of the day during the winter. It is manually enforced, and covers all vehicles, including motorcycles. 

See our Italian page for more details.