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yellow or fluorescent yellow-green traffic signs
prepare drivers for specific road conditions and hazards ahead
three-sided traffic signs
warn drivers to slow down when approaching an intersection and to be prepared to come to a complete stop
pennant-shaped traffic signs
posted to the left-hand side of two-way roads to warn drivers not to pass other vehicles on the left
rectangular traffic signs
display traffic regulations that drivers must obey, as well as helpful information
five-sided traffic signs
warn driver that they are entering an area near a school in which children may be crossing the road
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