Italy's state police put the morning of Saturday 1 August at black on its August traffic calendar, the top warning level, reserved for the most severe congestion. The rest of that weekend sits at yellow or red, meaning heavy traffic and possible critical conditions. Only one other morning this month carries the same black marking: Saturday 8 August.
The calendar is colour coded rather than descriptive: yellow for heavy traffic, red for heavy traffic with possible critical conditions, black for critical. Every Friday in August carries a yellow or red warning. Tuesdays and Wednesdays are consistently the best days to move.

