Saltire detected the symbol, which often appears with balls in the quadrants formed by the arms of the chi-cross, in standards that appear on the coins of Persepolis. She suggested that early Christians endorsed its solar symbolism as appropriate to Christ. She also wrote: "although it cannot be proved, ... in the white saltire of St. Andrew we still have a reminiscence of the old standard of the Persepolitan kingdom". In the old European Union standard, a black saltire set in an orange square is the hazard symbol for irritants (Xi) or harmful chemicals (Xn). It indicates a hazard less severe
County roads in Ohio signage or on obscure mileposts. For counties that do utilize county route shields, the Ohio Department of Transportation's "Ohio Manual of Uniform Traffic Control Devices" (OMUTCD) specifies two designs, the gold-on-blue pentagon found in the national MUTCD and an alternative black on white square also found in some other states. However, not all counties follow this standard: many county highway departments use unique designs, ranging from Athens County's simple green square with white legend, to Vinton County's yellow square with stenciled black legend, to Scioto County's white county outline on an orange square. Henry County uses Arial Bold lettering instead