Which errors to check in transport emissions accounting

Check units, missing route legs, boundary and allocation. Include sources, versions and excluded activities in the report file.

9 October 2024Updated 23 September 2026

Short answer

Check activity units, every route leg, system boundary, allocation key and factor source/version in the calculation sheet. If the method changed from the prior period, explain the difference and restate prior data on a like-for-like basis where comparison is needed. Disclose exclusions and uncertainty in the report.

In transport-emissions calculations, first check that each activity input's unit matches the factor's unit. Link distance, fuel, energy and load measurements to their sources and retain conversion steps.

Draw the route and verify how empty positioning, loading/unloading and return legs are treated. Check that the system boundary is consistent between trips and the source/version of factors and allocation methods is recorded.

If method or scope changed between periods, document it; where comparable reporting is needed, recalculate prior data using the same method or clearly qualify the difference. Identify an owner and evidence source for missing data, assumptions and exclusions.

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Topics:Sustainability and carbon Measurement and traceability

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