Could SafeZone in-road beacons (IRADs) be used in place of flashing roadside speed signs?
In all states of Australia, road authorities consider SafeZone as a supplementary system, meaning it can be used in conjunction with existing road-side or over-road lights, but not replace them. This means that in practice, IRADs can’t replace statutory road-side signs. However, SafeZone Active Advance Warning Signs, which are signs fitted with wirelessly controlled flashing beacons, can be used as primary warning signs, eg when indicating a railway crossing ahead, or when used as wigwags at a railway crossing.