Tail between the A1 crossroads/Fiorenzuola branches and the A1 crossroads/flat end Piacenza for the incident of the recommended entry to Milan: South Piacenza on the unplanition of Piacenza Sud. Recommended exit coming from Bologna: Fidenza.
Travel times could increase significantly. Pay attention.

In-depth analysis: what to do in the event of an accident?
(Source: motorway traffic service; image for illustrative or repertoire purposes)