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 Figure 17. Emergency sign to be placed 1.000 yards in advance of obstruction. (Paragraph 79)

Figure 18. Emergency sign to be placed 900 yards in advance of an accident. (Paragraph 79)

Figure 19. Emergency sign to be placed 900 yards in advance of road works. (Paragraph 79)

Figure 20. Emergency sign to be placed 600 yards in advance of an obstruction. (Paragraph 79)