Except for loading by' Supplementary Plate Inc Symbol - Post Mounted Sign Dia 620.1 R2/RA2This sign when used alongside signs prohibiting goods vehicles indicates that vehicles that are loading or unloading to premises in the area can proceed. This can often be in pedestrian areas where all vehicles are normally prohibited. For more information on where this sign can be used please consult the TSRGD guidelines, a link to which can be found on our regulations page.