Airval, and its urban rail equivalent Cityval, is the result of a research project called Neoval designed to develop a new-generation Val driverless system. Both Airval and Cityval can run at 1 minute headways and at an operating speed of 80km/h with faster acceleration and braking than Val. The cars are more spacious than with Val. Airval and Cityval have full electric service braking, and re-use energy both on-board and on the line. They are compatible with communications-based train control (CBTC).