Smoke Hazard (MMS-ADV-77) – Multi-Message SignThe Smoke Hazard (MMS ADV 77) multi message sign is a 600 600 millimetre traffic yellow panel designed to warn motorists of smoke reducing visibility on the road ahead. Commonly deployed during bushfires, burning off operations, or roadside works, this sign provides advance notice for drivers to slow down, switch on headlights, and exercise caution in low visibility conditions. Manufactured in compliance with Western Australia Government traffic