CFR›Title 49›Subtitle B›Chapter II›Part 222›Subpart C ContainsSection 222.31; Subject groups Silenced Horns at Groups of Crossings—Quiet Zones–Silenced Horns at Individual CrossingsCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Subpart C—Exceptions to the Use of the Locomotive Horn Contents 222.31 § 222.31 [Reserved] Silenced Horns at Groups of Crossings—Quiet Zones Silenced Horns at Groups of Crossings—Quiet Zones Sections 222.35–222.59 Silenced Horns at Individual Crossings Silenced Horns at Individual Crossings Section 222.33 Previous B Subpart B—Use of Locomotive Horns