Metrebus Roma tickets
Inside the city of Rome it is possible to use them on Cotral buses only within the urban route.
Metrebus Lazio tickets
Inside the Lazio Region they can be used on Cotral buses within the purchased travel zones (urban and suburban route).
Metrebus Rome and Lazio tickets may not be used on the Cotral special connection Roma Tiburtina/Termini - Fiumicino Airport.