The use of production waste and/or by-products in the construction industry, especially in the road construction, is the one of the factors to preserve the natural nonrenewable mineral aggregates, and simultaneously prevent unwanted impacts of industrial processes on the environment in which these wastes and/or by-products are formed. In the last thirty years the world application of production waste and/or by-products in road construction, especially of waste materials such as damaged asphalt layers, crushed concrete, blast furnace and steel slag, fly ash from coal thermal power plants etc, has been significantly increased. Among the residues of the production from the metallurgical industry, which can be classified as waste and/or by-products, particularly significant is the slag from iron and steel production, which has seen known as a secondary raw material from the earliest history, and represents a by-product of the process which were created according to the modern definition by this term. Therefore, in the past few decades all possibilities for no-landfill disposal of slag on the principles of economic viability and environmental acceptability have been intensively studied. This paper presents data of steel slag, which widespread use in road construction based on its physical - chemical and mechanical properties. In addition to the data on the use application of slag in the World and for the European road construction, the data on research possibilities of domestic EAF slag use application as a road construction aggregates are presented.