Proposal to reduce variability of measurements due to measurement uncertainties.

Proposal to introduce Real Driving Additional Sound Emission Provisions (RD-ASEP) as a preliminary test procedure for the purpose of collecting experience on the complete new test and evaluation concept.

Text prepared by the Informal Working Group on Measurement Uncertainties (IWG MU) as a document of reference. IWG MU was given the first task to amend UN Regulations Nos. 51 and No.117 to reduce measurement uncertainties

Text prepared by the experts from the Informal Working Group on Additional Sound Emission Provisions (IWG ASEP) in order to improve the current wording for better clarification.

Working draft text to introduce procedures for real-driving testing.

Input for drafting provisions to introduce procedures for real-driving testing.

Draft proposal for a Supplement to the 03 series of amendments introducing Annex 9 on “Measurement method to evaluate compliance with the Real Driving Additional Sound Emission Provisions (RD-ASEP)”.

Draft pursuant to the ASEP II drafting group session on 21 October 2021.

New Annex 9 (Measurement method to evaluate compliance with the Real Driving Additional Sound Emission Provisions (RD-ASEP)) and related appendices.

Draft pursuant to the ASEP II drafting group session on 21 September 2021.

Working draft pursuant to the ASEP II drafting group session on 21 September 2021.

Draft document pursuant to the ASEP II drafting group session on 21 September 2021.

Draft document pursuant to the ASEP II drafting group session on 21 September 2021.

Draft document pursuant to the ASEP II drafting group session on 21 October 2021.

Text pursuant to 21 September drafting group session.

Text pursuant to the 21 September drafting group session.

Draft text integrating input from the Sound Measurement Uncertainties informal group pursuant to the 21 September drafting group session.

Draft text integrating input from the Sound Measurement Uncertainties informal group pursuant to the 21 September drafting group session.

Based on GRBP-74-22 plus measurement uncertainties provisions.

Sets the Objective and Rules of Procedure for the Task Force

TFVS analyses of the feasibility of further limit value reductions and their effectiveness in real traffic conditions.

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

IWG on Measurement Uncertainties identified the temperature behaviour of tyre rolling sound component as a contributor to the measurement uncertainty of pass-by noise tests. Since in UN Reg. No.117 a temperature correction of tyre rolling sound is already established the group investigated an adoption of the existing calculation procedure. Due to the different testing conditions in UN Reg. No.117, new scientific investigations and industry data in pass-by testing the group worked out a temperature correction, which is adopted to the requirements of UN Reg. No.51.

This revised document intended to present to amend 117 the timetable for the work related to Regulation No. 117 has been shifted with approximately 12 months for this part.
The aim of the IWG is to propose harmonized measures for evaluating systematic errors and random errors to improve the test procedures to reduce measurement uncertainties

Flyer in German and French for a September 2017 technical conference: Lärmarme Strassenbeläge aus Asphalt/Revêtements bitumineux peu bruyants.

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.

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

Final draft of the Noise Measurement Uncertainties task force.

Overview of UTAC CERAM testing designed to consider the impact of additional tightening of tyre performance limits on the balance
between legal requirements (rolling resistance, wet grip and rolling sound emission) and other performance aspects not subject to legal requirements.

Measurement Uncertainties informal group proposal to clarify the text and to amend:

1. Annex 3, Paragraph 1.4. to delete determination of the vehicle speed by independent speed measuring devices
2. Annex 3, Paragraph 1.5. to clarify that no determination of the wind speed is needed for indoor testing
3. Annex 3, Paragraph 2.1.3. to clarify and differentiate between indoor and outdoor testing
4. Annex 3, Paragraph 2.1.3.1.2. to clarify the temperature range for indoor facilities.
5. Annex 3, Paragraph 2.1.3.2.2. to clarify the temperature range for outdoor facilities.

Email (.msg format) raising a question on the application of UN R156 to noise requirements under UN R51with regard to possible risk of deviation from limits resulting from a software update.

Proposal by experts from IWG ASEP for new series of amendments.

Draft proposal as of 15 January 2021.