T1B or TW01B Temporary Warning Road Works Road Signs, referred to as a W1-1B Sign in the TCD Rule, are used at all attended work sites or unattended work sites where there are hazards within 5m of the edge of the road. The TW-1 Road Works Sign is used on Level 2/3 New Zealand Roads for Temporary Traffic Management (TTM) and is in the Waka Kotahi Code of Practice (CoPTTM).