Turin has tightened its anti smog emergency scheme for 2017/18. 

After 20 consecutive days exceeding 50 mcg/m³ :

• all passenger cars are banned from Monday to Sunday from 08:00 - 19:00
• all vehicles delivering goods are banned from Monday to Friday 08:30 - 14:00 and 16:00 - 19:00 and Saturday and Sunday from 08:30 - 15:00 and 17:00 - 19:00

For more information on the scheme and the other restricions that apply go to Torino.