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On-road testing with Portable Emissions Measurement Systems (PEMS) - Guidance note for light-duty vehicles

This guidance note describes the best practice for the preparation, the execution, and the follow-up of emissions tests that are conducted with PEMS on board of light-duty vehicles (LDV) equipped with conventional combustion engines (gasoline, diesel, CNG, LPG), in particular for testing vehicles according to the RDE legislative requirements laid down in Regulations (EU) 2017/1151, 2016/427, 2016/646, 2017/1154, and the last "RDE4" package approved at TCMV on May 3rd 2018 (collectively referred to in this document as the EU-RDE LDV regulations).