Structural Data: Transport infrastructures
In Germany, infrastructure for the purpose of transportation – primarily roads, farm roads and railway/tram lines – constitutes a material store of around ten billion tonnes. 90 % of this can be attributed to roadways. The dominant materials used for transport infrastructure are non-metallic minerals, which make up around 99 % of the total stock of material within transport infrastructure. The remainder is made up of bituminous binding agents in roadway construction (approx. 1 % of total), as well as metals (0.2 %) and impregnated wood in track construction (0.04 %). The non-metallic materials are primarily aggregates such as gravel, sand and natural stone in various forms (grit, crusher dust and rock flour), as well as building products made from these such as concrete. The determined material masses are based on studies of Germany’s anthropogenic material stock (Schiller et al. 2015). These studies were carried out on behalf of the Federal Environment Agency at the Leibniz Institute of Ecological Urban and Regional Development (IOER) in cooperation with the Wuppertal Institute for Climate, the Environment and Energy and the company INTECUS GmbH Dresden.