Matrix of anticipated national requirements for audible vehicle alerting systems, covering the scope of vehicle applications and whether individual specifications will be mandatory, optional, or prohibited.

Report of the ad‐hoc working group organized in accordance with the recommendation of the 58th GRB session to consider testing and evaluation of the variant method using the dω/dt form proposed by Russia.

Proposal to allow horn sound level testing with the engine running and lower the sound pressure level requirement for light-duty vehicles from 93 dB (A) to 90 dB (A).

Testing and Evaluation of the variant method using the dω/dt form.

Proposal (revised from its earlier version) to allow horn sound level testing with the engine running and lower the sound pressure level requirement for light-duty vehicles from 93 dB (A) to 90 dB (A).

Presentation in support of the proposal for additional vehicle categories and sound emission level requirements under UN R51. A “Flat Front Light N1 Vehicle” is defined as:

• GVM ≤ 2.5 ton
• PMR (power to mass ratio) of GVM ≤ 35kW/t
• Engine capacity ≤ 660cc
• d value<1,100mm

Revised mandate as approved by the GRB at its January 2014 session for the informal working group established to finalize revisions to UN Regulation No. 51 and UN Regulation No. 59 with a view towards their alignment with the latest European Union decision concerning noise emissions from vehicles having at least four wheels.

Overview of the NordTyre Project to investigate the noise performance of passenger car tyres on typical road surfaces in Norway, Sweden and Denmark and to clarify which combinations of road surfaces and tyres yield the lowest tyre/road noise levels.

European Commission proposal for minimum wet grip limits on Class C3 tyres. The EC notes that the wet grip (G) index is intended as a precautionary measure that would set a minimum level already satisfied by products currently on the market. In anticipation of improvements in new tires, the EC proposes to add a notation “Wet grip index (G) ≥ 0.80 may be considered for new types of tyres 96 months after the entry into force date of Supplement 5 to the 02 series of amendments, based on robust field data and cost-effectiveness analysis.”

Report of the special meeting held in Paris on 21 November 2013 to discuss wet grip values for Class C2 and C3 tyres.

Revised mandate (with changes marked up) as approved by the GRB at its January 2014 session for the informal working group established to finalize revisions to UN Regulation No. 51 and UN Regulation No. 59 with a view towards their alignment with the latest European Union decision concerning noise emissions from vehicles having at least four wheels.

Text prepared by the GRB Expert Group on Regulation 51 and revised during the GRB-59 session consolidating the proposed 03 series of amendments to UN Regulation No 51 developed during the informal group’s fourth meeting in Brussels on July 4 plus additions from November 8. This version removes references to “acoustic vehicle alerting systems” (AVAS)

Proposal to elaborate on the concept of tyre deceleration (dω/dt) in the test procedures. The Russian Federation has developed a “Deceleration Calculator” for use in the UN R117 procedures. Following work by an ad hoc group (including NAMI, UTAC, and ETRTO) formed to review and validate this tool, Russia has prepared this new proposal, modifying the version (document GRB/2013/10) submitted at the last GRB session. The changes primarily concern the explanation of the tool rather than the basic mathematical equations.

Report of the ad‐hoc working group organized in accordance with the recommendation of the 58th GRB session to consider testing and evaluation of the variant method using the dω/dt form proposed by Russia.

Full report of the ad hoc group on the development of the method for determining tire rolling resistance using the variant dω/dt method.

Submission of the wet grip limit values for Class C3 tires as agreed to within the Working Party on Brakes and Running Gear (GRRF). These values were originally proposed in document WP.29/2013/66.

Latest informal draft of the proposed global regulation to establish minimum sound requirements for quiet vehicles as a measure to improve pedestrian safety as being developed by the GTR-QRTV informal group and its drafting task force.

Proposal originally by OICA (document GRB/2014/2) to update requirements for the noise test track from ISO 19844:1994 (i.e. Annex 8 of this Regulation) to ISO 10844:2011 and to allow for repaving of existing, non-compliant test tracks to meet the ISO 10844:2011 standards as adopted by the Working Party on Noise (GRB) at its 59th session. This change concerns the measurement of vehicle passing noise.

Adopted position (2014/C 82 E/01 on 20 February 2014) by the Council of the European Union (Council Position (EU) No. 3/2014) with a view to the adoption of a regulation of the European Parliament and of the Council on the sound level of motor vehicles and of replacement silencing systems, and amending Directive 2007/46/EC and repealing Directive 70/157/EEC.

Working draft of proposed amendments to UN R51 in order to align its provisions with the latest EU noise requirements pursuant to the second informal working group session of 25 March 2014.