7. GRBP was briefed on the progress of IWG RD - ASEP (GRBP-81-04). GRBP noted that the IWG RD - ASEP activities on UN Regulation No. 51 were ongoing, while on UN Regulation No. 41 finished but might be resumed in the future, if required.

8. The experts from OICA and several Contracting Parties reported on the ongoing ASEP/ RD-ASEP study (GRBP-81-32-Rev.1). the consortium including several CPs and OICA presented a report on the ongoing Real Driving – Additional Sound Emission Provisions (RD-ASEP) monitoring study that aims at modifying the ASEP test protocol to get closer to real drive conditions and to allow the sound evaluation for any kind of vehicle/propulsion technology. A sound expectation model was defined, but verification would be needed for robustness of this model. GRBP noted that further data and analysis would be required for electric vehicles under cruising and full acceleration situations. To this end, OICA invited Contracting Parties and NGOs to conduct tests and to provide data to OICA.

9. The IWG RD-ASEP Subgroup on UN Regulations Nos. 138 and 51 reported on their activities with the aim to find a satisfactory solution for the sound emissions of electric vehicles (EVs) and to update both UN Regulations (GRBP-81-18-Rev.1). For UN Regulation No. 51, the Subgroup agreed to introduce electric vehicles in the scope of Annex 7 (ASEP). For UN Regulation No. 138, the double target was to ensure an adequate level of safety due to the reduced audibility of quiet vehicles at lower speeds but to keep this additional sound (AVAS) level not too loud. GRBP also noted a request from the industry to “keep agreeable flexibility in vehicle sound design where environment is not at stake”.

10. The expert from IWG RD-ASEP proposed a data form for testing of electric vehicles (EV) under cruising and full acceleration situation (GRBP-81-33-Rev.1) and invited all interested parties, during test, to fill in this form and to send it to the Subgroup for further analysis.