MUTCD 11th Edition (2023)
Section 8B.20 — NO TRAIN HORN Sign or Plaque (W10-9 and W10-9P)
Manual on Uniform Traffic Control Devices, Section 8B.20. Standards, guidance, options and support statements, with figures and cross-references.
Section 8B.20 NO TRAIN HORN Sign or Plaque (W10-9 and W10-9P) Standard: 01 Either a NO TRAIN HORN (W10-9) sign (see Figure 8B-4 ) or a NO TRAIN HORN (W10-9P) plaque (see Figure 8B-4 ) 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 (W10-1 through W10-4) sign (see Fig ure 8B-4 ).
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