The system of public works in a country, state or region, including roads, utility lines and public buildings. Expenditure on new construction and extension of existing infrastructure, including reconstruction, renewal and major repairs of infrastructure. Infrastructure includes land, permanent way constructions, buildings, bridges and tunnels, as well as immovable fixtures, fittings and installations connected with them (signalling, telecommunications, catenaries, electricity sub-stations, etc.) as opposed to rolling stock.