ATAC has a fleet of 53 electric powered TecnoBus Gulliver buses. These buses are assigned to circulators in Central Rome that operate on streets that are too narrow for standard sized buses. Additionally, because these buses' electric engines are so quiet, they do not create noise pollution that might be harmful to old structures in the ancient city center. These buses were pulled from service in 2014 due to fires breaking out on the vehicles. Rome announced in 2018 that the municipality had reached an agreement with TecnoBus to "revamp" the buses that were idling in the depots upon being removed from service.