Proposal to align UN R92 with the latest amendments to UN R41 and to reduce the number of exhaust system types (allowing for slight differences in drawings) to be approved by NORESS manufacturers.

Proposal to clarify interpretation of the requirements concerning variation of sound emitted proportionally with the vehicle speed.

Proposal from the Worn Tyres working group to introduce a procedure and thresholds on wet grip performance for C1 tyres in worn state.

Proposal to introduce a procedure and thresholds on wet grip performance for tyres in worn state for C1 tyres as submitted to GRBP by the Worn Tyres working group.

Proposal from the Noise Measurement Uncertainties informal group to to reduce variability of measurements.

Proposal to align the 02 series of amendments to UN Regulation No. 63 with standard 10844:2014 of the International Organization of Standardization (ISO).

Proposal to align the 08 series of amendments to UN Regulation No. 9 with standard 10844:2014 of the International Organization of Standardization (ISO).

Proposal to introduce provisions for ice grip tyres, clarify Conformity of Production, sample submissions, and testing methods, and to make editorial corrections and improvements.

The Phenomena study was seeking to define the potential of measures capable of delivering significant reductions (20%-50%) of health burden arising from the environmental noise of roads, railways and aircraft, and to assess how relevant noise related legislation could increase the implementation of the most effective measures, while considering the constraints and specificities of each transport mode.