T222 or TW02.12 Temporary Warning Traffic Survey Road Signs, referred to as a W2-1.12 Sign in the TCD Rule, is a supplementary plate, used to indicate to drivers that a traffic survey is being carried out ahead. The TW-2.12 Traffic Survey Sign is used underneath a T2 TW-2 Other Hazard Sign and available for Level One or Level 2/3 New Zealand Roads for Temporary Traffic Management (TTM) and is in the Waka Kotahi Code of Practice (CoPTTM).