ASEP II	2nd Informal Working Group on Additional Sound Emission Provisions Last session: February 2022
FIT	Regulation Fitness for Automated Vehicles
GRBP-TFAVRS	GRBP Task Force on Automated Vehicle Regulation Screening Last session: July 2025
GTRQRTV	Global Technical Regulation for Quiet Road Transport Vehicles Informal Group Last session: May 2018
IG-ASEP	Real-Driving Sound Emission Provisions for M1/N1 Vehicles Last session: June 2024
IWGMU	Informal Working Group on Noise Measurement Uncertainties Last session: November 2023
RDASEP	Real-Driving Additional Sound Emission Provisions: Monitoring Phase 2023 Last session: July 2025
RDASEPL	Real-Driving Additional Sound Emission Provisions for L-Category Vehicles Last session: December 2024
SIG-AVRS	GRBP Special Interest Group on Screening of Regulations for AV Applicability Last session: January 2024
TA	Task Force on Tyre Abrasion Last session: June 2025
TFMU	Task Force on Vehicle and Tyre Noise Measurement Uncertainties Last session: June 2022
TFQRTV	Task Force on QRTV and UN R138 02 series of amendments Last session: November 2023
TFRWS	Task Force on Reverse Warning Sound Issues Last session: October 2021
TFST	Task Force on Studded Tyres Last session: May 2022
TFVS	Task Force on Vehicle Sound Limits Last session: July 2025
TPMSTI	Task Force on Tyre Pressure Monitoring Systems and Tyre Installation Last session: July 2021
TYREGTR	Informal Group on the Development of a Tyre GTR Last session: September 2019
WT	Wet Grip on Worn Tyres Last session: March 2025