CPV code 45234181 designates Construction work for rail track sectioning cabins in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
45234181 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 45234180 (Construction work for railways workshop).