{"data":{"id":"us/49-cfr-177.810","jurisdiction":"us","citation":"49 CFR 177.810","heading":"Vehicular tunnels.","body":"Except as regards Class 7 (radioactive) materials, nothing contained in parts 170-189 of this subchapter shall be so construed as to nullify or supersede regulations established and published under authority of State statute or municipal ordinance regarding the kind, character, or quantity of any hazardous material permitted by such regulations to be transported through any urban vehicular tunnel used for mass transportation.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS","PART 177—CARRIAGE BY PUBLIC HIGHWAY","Subpart A—General Information and Regulations"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"fce4cc940035c23a63dbfd88387d527bed32083bfc2e8dc8437d5deef9198743","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-177.804","next":"us/49-cfr-177.816"},"notice":"GroundRules: Original legal text. Not legal advice."}