Traffic Controller (TC1257) Multi-Message SignThe Traffic Controller (TC1257) multi message sign is a 600 600 millimetre panel finished in bright fluoro orange, designed to warn motorists that qualified traffic controllers are managing vehicle movement ahead. When crews are working on or near the road and manual stop slow control is in place, this sign gives drivers a clear heads up to slow down, watch for instructions and proceed carefully, keeping both workers and the travelling public safe.