Railroads carry an important part of the total freight. The advantage of rail transport lies in its ability to meet different needs. Railroads can carry the heaviest and the lightest products and can run at different speeds. For special types of goods railroads provide adapted cars. Thus for perishables refrigerator cars are used, for oil products there are tank cars, for different other materials dumper cars are used. The freight rates of railroads compare favorably with the other modes of transport.