TMH18: road-asset data exchange
Agree the receiving authority’s format and version
What this reference covers
The Department of Transport lists TMH18 road-asset data exchange material. Use the receiving authority’s selected specification when preparing a submission.
Interpretation and limits
A file with the right extension is not evidence of compliance. Check schema, units, identifiers, null values and a representative export against the agreed version.
Follow the evidence
Record the exact source edition and the applicable project requirements. Educational summaries do not establish product or project compliance.
Reference
Department of Transport (n.d.) Roads: Engineering Standard Guidelines and Manuals. TMH18 listings. Original source (Accessed: 5 September 2026).
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