US lawIdahoRegulationsIDAPA 39 — Transportation, Department ofChapter 39.03.41 — Rules Governing Traffic Control Devices001IDAPA 39.03.41.001PurposeLast amended: 2025Year: 2026Length: 24 wordsOfficial source This rule establishes standards, guidance, options, and supporting information for the design, construction, and implementation of traffic control devices. (7-1-25) 002. – 003. (RESERVED)PreviousIDAPA 39.03.41.000NextIDAPA 39.03.41.004