Road signs in South Africa are based on the SADC-RTSM, a document designed to harmonise traffic signs in member states of the Southern Africa Development Community. Most of these signs were in the preceding South African RTSM. A white background signifies the sign is permanent, while a yellow background signifies that the sign is temporary. Warning signs are an upwards-pointing red triangle and contain a black pictogram describing the danger or obstruction. Speed limit signs are a red circle with the limitation in black. South Africa drives on the left.