W3 Series – Advance Traffic Control W3-1 – STOP AHEAD (SYMBOL) W3-1a – STOP AHEAD (WORD LEGEND) W3-2 – YIELD AHEAD (SYMBOL) W3-2a – YIELD AHEAD (WORD LEGEND) W3-3 – SIGNAL AHEAD (SYMBOL) W3-3a – SIGNAL AHEAD (WORD LEGEND) W3-4 – BE PREPARED TO STOP W3-5 – SPEED REDUCTION AHEAD W3-5a – SPEED ZONE AHEAD W3-6 – DRAW BRIDGE AHEAD