It is an extension of the previous first section, completed in 2006. That new line, starting from station Porta Nuova running south to Lingotto, has all the same characteristics of the section 1. Therefore, is based on the VAL System (automated light vehicle), is integrated with the tramway network and with the main railway station as well as some car parks.

The trains are equipped with rubber wheels (higher speeds, lower breaking distances and less vibration). Stations have been designed in accordance with an Architectural Plan prepared by Kohn & Associates just for the first section line, with the aim of rationalising and minimising the volume and the inside and exit corridors according to the previous section one. It consists of 6 station with an average distance of 550 meters and 3,8 km of tunnel line, at an average depth of 20 meters.

A typical station is 19 m wide and 60 m long (the trains have a total length of 52 meters and can carry up to 440 passengers), and lies at an average depth of 16 m. 

Whereas stations were built by the cut-and-cover method, running tunnels were excavated by tunnel boring machines (7,8 meters in diameter), EPB type.

Michela Chiorboli was the Project Engineer for executive design and works site supervision.