Which signal to use?

1 - Full or normal semaphore2 - Standard 2/normal/full semaphore3 - Junction semaphore4 - Caution semaphore5 - Signal barrier (RED)6 - Signal barrier (WHITE)

7, 8 - Standard 2/normal/full semaphore9 - Normal or full semaphore10 - Standard 3 (WHITE) or full (DOUBLE YELLOW)11 - Standard 3 (WHITE)12 - Standard 3 (WHITE)

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