{"@context":"https://schema.org","@type":"DefinedTerm","name":"Tunnel Restriction Code","description":"Dangerous goods safety advisors and transport planners check Tunnel Restriction Codes before finalising any hazardous goods route. Under the ADR framework, each road tunnel is assigned a category from A to E that determines which classes of hazardous materials may pass through – ranging from unrestricted access at Category A to a near-total ban on explosives and highly flammable substances at Category E. The more restrictive the code, the more cargo categories must be diverted to alternative roa","inDefinedTermSet":{"@type":"DefinedTermSet","name":"Frachtportal Logistics Glossary","url":"https://www.freight-academy.com/en/glossary"},"url":"https://www.freight-academy.com/en/glossary/tunnel-restriction-code","inLanguage":"en","dateModified":"2026-06-26T13:53:13.760861","citation":"https://unece.org/transport/dangerous-goods","markdownMirror":"https://www.freight-academy.com/api/md/glossary/en/tunnel-restriction-code","provider":{"@type":"Organization","name":"Frachtportal","url":"https://www.freight-academy.com"},"quickSummary":"Tunnel Restriction Code · Dangerous goods safety advisors and transport planners check Tunnel Restriction Codes before finalising any hazardous goods route. · Quelle: https://unece.org/transport/dangerous-goods"}