What it means.
Tank-to-Wheel (TTW) emissions measure the direct operational combustion of fuel within a vehicle during transport. It reflects tailpipe emissions of carbon dioxide, methane, and nitrous oxide while driving.
01DefinitionGLEC Framework / ISO 14083
Direct operational emissions released from the vehicle's exhaust or powertrain during freight transit.
Where it is used.
Tracked through vehicle CAN-bus diagnostics and fuel consumption sensors, providing the empirical baseline for verified freight corridors.
TTW = Fuel_Consumed (L) * Direct_Emission_Factor (kg CO2e/L). For standard EN 590 diesel, TTW factor is 2.64 kg CO2e/L.
Read it carefully.
TTW measurements represent only a portion of total emissions and cannot be used alone for comprehensive sustainability claims without WTT inclusion.
- TT-FRD-SEMANTIC-LAYER-2026