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Vermelho: alta. Não entrar. maneira errada.Laranja: construção e manutenção de aviso.Amarelo: Aviso geral. Observe condições inesperadas na estrada.Amarelo-Verde Fluorescente: aviso ênfase no ensino médio, a pé ou atividade de ciclismo.Branco / Preto: Regulatory.Verde: Guia ou informação direcional.Azul: Guia de Serviços para o motorista. Ele também é usado para identificar lugares de estacionamento para deficientes motores.Café: Áreas de público, recreação cultural e significado histórico.

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