CPV code 60172000 designates Hire of buses and coaches with driver in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
60172000 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 60170000 (Hire of passenger transport vehicles with driver).