The transportation system in Vatican City, a country 1.05 km long and 0.85 km wide, is a small transportation system with no airports or highways. There is no public transport in the country. A heliport and a short railway is used for special occasions only. Most visitors will walk from a nearby Italian bus or train stop, or car parking. Given an average walking speed of 3.6 km/h, Vatican City can be crossed in 20 minutes or less. Thus, much of the infrastructure in the Vatican consists of St. Peter's Square itself, hallways and aisles in the basilica and surrounding buildings, and walkways behind and between the buildings.