T211 or TW02.1 Temporary Warning Flooding Road Signs, referred to as a W2-1.1 Sign in the TCD Rule, is a supplementary plate, used whenever surface water is on the roadway and creates a hazard to traffic operations. The TW-2.1 Flooding Traffic 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).