From the article it's clear that the intention is to replace car use with biking and walking, not use of public transport.

e.g. (from the article):

As a result, Milan is going big on cycling and walking. Over the summer, the city core will be partly remodeled to give over 22 miles (35 kilometers) of road space previously used by cars to bikes and pedestrians. Those cars that are allowed into the center must adhere to a new reduced 30 kilometers per hour speed limit. The aim is to make traffic more fluid and give pedestrians more space to spread out safely.