Milan and other large Italian cities have a terrible car-centric culture. In Rome this is more justified because public transport sucks. In Milan, I don't get it.
I will believe this kind of change only when I see it.
Italian from Rome living in Milan for 8 years now.
The explanation is simple: transport of goods _and_ a lot of people coming from Monza/Brianza area to work in Milan and back home in the evening.
Crazy at it seems, they prefer to use their cars over the (frankly terrible) regional trains, that in theory can do Monza-Milan in 10 minutes, but in practice most of the times are late, overcrowded or canceled, with no warnings.
There's also a lot of traffic between Milan and San Donato Milanese where a lot of large companies have their own old school giant offices with thousands of employees (Eni, for example) .
I will believe this kind of change only when I see it.