CPV code 45234000 designates Construction work for railways and cable transport systems in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
45234000 sits under 45230000 (Construction work for pipelines, communication and power lines, for highways, roads, airfields and railways; flatwork) and groups 2 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.