CPV code 45221000 designates Construction work for bridges and tunnels, shafts and subways in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
45221000 sits under 45220000 (Engineering works and construction works) and groups 2 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.