Informal Group on Additional Sound Emissions Provisions ASEP

2nd Informal Working Group on Additional Sound Emission Provisions ASEP II

Working Party on Noise GRB

Working Party on Noise and Tyres GRBP

GRBP Task Force on Automated Vehicle Regulation Screening GRBP-TFAVRS

Working Party on Brakes and Running Gear GRRF

Global Technical Regulation for Quiet Road Transport Vehicles Informal Group GTRQRTV

GTR Drafting Task Force of the QRTV GTR Informal Group GTRQRTV-TF

Real-Driving Sound Emission Provisions for M1/N1 Vehicles IG-ASEP

Informal Working Group on UN Regulations Nos. 51 and 59 IWG-R51/R59

Informal Working Group on Noise Measurement Uncertainties IWGMU

Informal Group on Quiet Road Transport Vehicles QRTV

Informal Working Group on Motorcycle Noise Emissions (Regulation No. 41) R41WG

RD-ASEP R51/R138 Subgroup R51/R138

Real-Driving Additional Sound Emission Provisions RDASEP

RD-ASEP Editing Task Force RDASEP-Edit

RDASEP Task Force on Data Analysis RDASEP-TFDA

Real-Driving Additional Sound Emission Provisions for L-Category Vehicles RDASEPL

Informal Working Group for the Development of a UN Regulation on Quiet Road Transport Vehicles REG58-QRTV

Joint GRRF/GRB informal group on Special Tyre Definitions STD

Task Force on Tyre Abrasion TA

Task Force on Vehicle and Tyre Noise Measurement Uncertainties TFMU

Task Force on QRTV and UN R138 02 series of amendments TFQRTV

Task Force on Reverse Warning Sound Issues TFRWS

Task Force on Studded Tyres TFST

Task Force on Vehicle Sound Limits TFVS

ASEP II UN R51-04 Drafting Group UNR51-DG

Wet Grip on Worn Tyres WT