UN R51: Proposal for 04 series of amendments
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Introduces Real Driving Additional Sound Emission Provisions (RD-ASEP) for vehicles of categories M1 and N1 covering driving conditions outside of normal driving with higher accelerations and vehicle speeds up to 100 km/h

Reference Number: GRBP-74-22
Date: 7 September 2021
Proposal Status: Informal GR review
Related Documents:
GRBP-74-22+MU | UN R51: Proposal in progress for a 04 Series of amendment