Line 6 is a 5.8 km long underground metro line with nine stations connecting Campi Flegrei and Piazza Municipio junctions.
Vehicles have a single point of articulation between two bodies mounted on three bogeys.
The drive bogeys are at each end of vehicles. The power supply is sized to deliver sufficient power for 6 minute train spacing. Systems have been designed to allow upgrading to 3 minute train spacing with minimum extra costs. This means that if one of the two power supply points fails, it puts the substation or station cabin out of service only for the time required to connect to the second feed point. Electric substations Detailed computer simulations of vehicle, track and power supply interaction show that three electric substations are required to deliver sufficient power for full service even if one of the substations fails.