20km Speed (MMS-REG-1-20) – Multi-Message SignThe 20km Speed (R4 1M20) multi message sign is a 600 600 millimetre white regulatory panel designed to enforce a maximum speed limit of 20 kilometres per hour. This sign provides a clear directive for motorists to reduce speed in areas such as roadworks, site access points, and residential zones. Manufactured to Queensland Government traffic control requirements, the panel integrates seamlessly with the state approved multi message frame system. As