Vatican City
Vatican City has a reasonably well-developed transport network considering its size (consisting mostly of a piazza and walkways). A state that is long and wide, it has a small transportation system with no airports or highways. The only aviation facility in Vatican City is the Vatican City Heliport. Vatican City is one of the few independent countries without an airport, and is served by the airports that serve the city of Rome, Leonardo da Vinci-Fiumicino Airport, and to a lesser extent Ciampino Airport.
Rail transport in Vatican City
The Vatican City State Railway branches off from the Rome to Viterbo railway line at the Roma San Pietro railway station and crosses Gelsomino valley via a 143.12 metre long masonry viaduct of eight 15.30 metre arches (bearing the Fasces and the Savoy Coat of Arms), which crosses Viale Vaticano (which it interrupts) and Via Aurelia. The Via delle Cave and the Via del Gelsomino are also interrupted by the viaduct and thus merge with the Via Aurelia.
The single track section of the route up until the border was subsequently fitted with overhead electric line. The first 100 metres of overhead line is always supplied with 3000V DC, with the remainer of the distance only energerised as needed.