The “Optimisation of the line Český Těšín – Dětmarovice” is a line construction and is part of the European railway network TEN-T in accordance with Decision No 661/2010/EU of the European Parliament and of the Council on Union guidelines for the development of the trans-European transport network. The construction “Optimisation of the line Český Těšín – Dětmarovice” is classified according to the territorial planning documentation as a public transport construction, which will modernise or optimise the section of the railway line, which is part of the III iron. corridor.