Currently, Italy is working on improving a major project, the high-speed rail. The goal of the construction is to connect major cities across Italy. It aims to reduce travel times and improve connectivity. 

Milan is a city that is considered infrastructurally developed. It consistently ranks well in smart city indexes, and it has a strong infrastructure network, including a modern metro system, efficient public transportation, and well-maintained roads. It's also a central hub for air travel. 

There isn't a specific city in Italy lacking infrastructural development, but the southern region is seen to be lagging in infrastructure development compared to the north. Public transportation is less extensive, and roads might need repair. Some areas even struggle with efficient waste collection and disposal systems.