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Compliance
8B.21 NO TRAIN HORN Sign or Plaque
Standard
- Either a NO TRAIN HORN (W10-9) sign or a NO TRAIN HORN (W10-9P) plaque shall be installed in each direction at each highway-rail grade crossing where a quiet zone has been established in compliance with 49 CFR Part 222. If a W10-9P plaque is used, it shall supplement and be mounted directly below the Grade Crossing Advance Warning (W10 series) sign (see Figure 8B-4).
Source: 2009 MUTCD