Raised intersections on arterial roads can reduce casualty crashes by up to 40% (Austroads). In Victoria, large signalised intersections have been raised at over 18 locations (some example photos below).  
Raised intersections are also known as platform intersections, raised junctions or plateaus. These speed management devices typically aim to reduce the speed of vehicles to 50 km/h or less. The entire intersection can be raised with the pavement surface sometimes flush with the adjoining footpath. Alternatively, raised platforms can be placed in advance of the intersection (sometimes referred to as raised stop bars or raised safety platforms) to achieve a similar effect. Raised intersections can be painted or paved in a manner such that they serve to further increase driver awareness of the intersection.

Research: Austroads, Research Report AP-R642-20, “Effectiveness and Implementation of Raised Safety Platforms”