Area C is a congestion charge active in the city center of Milan, Italy. Answer 1 of 7: Hello, I am driving to Milano in April and I want to know when is ZTL active (hours)? (Will drive on Thursday and Friday). Below are detailed ZTL maps for Rome, Florence, Milan, and Pisa. Area C or Limited traffic zone (ZTL) is located in the old town area of Milan, and involves access limits for certain types of vehicles, mainly affecting private. Useful information about the Milan ZTL. ZTL Zones - a complete guide to restricted driving zones in Italy including ZTL maps, information on how to avoid them and what to do when.