the payment for the actual use of a service. Route The highway is 18.5 km (11.5 miles) long; the stretch from the airport to the junction with the Grande Raccordo Anulare is 11.9 km (7.4 miles) long. The highway is mainly a straight path, except for a curved stretch along a bend of the Tiber (within the Magliana urban zone, in the Portuense neighborhood) and three wide curves along the Viaduct of the Magliana, in the last stretch inside Rome (2,5 km). A91, along with A24, is the only motorway in Rome which penetrates the city within the Grande Raccordo Anulare. References Buildings and structures completed in 1959 Autostrade in Italy Transport in Rome Fiumicino Transport in Lazio