Worldwide Harmonised Light Vehicles Test Procedure
The Worldwide Harmonised Light vehicles Test Procedure (WLTP) is a global driving cycle standard for determining the levels of pollutants, CO2 emission standards and fuel consumption of conventional internal combustion engine (ICE) and hybrid automobiles, as well as the all-electric range of plug-in electric vehicles. The WLTP was adopted by the Inland Transport Committee of the United Nations Economic Commission for Europe (UNECE) as Addenda No.
Source: Wikipedia — Worldwide Harmonised Light Vehicles Test Procedure (CC BY-SA 4.0)