Proposal to delete category L₄ vehicles from the scope of the regulation. Motorcycles with a side car (L4 category vehicles) should be tested in a state that is designed to be operated on the road (i.e. the side car fitted to the vehicle) using the test procedures of UN Regulation No. 9. Since UN Regulation No. 41.04 does not cover motorcycles with a side car, this text should be deleted in order to avoid any potential misunderstandings.

Information on back-up accidents in Korea and proposal for scope and content of new requirements for reversing warning alarms.

Paper presented at a Dutch Infra Congress 2016 held on 23 June 2016 concerning the potential benefits of a road labelling system.

Explanation of Netherlands interest in labeling of road surfaces, in particular as a means to encourage reductions in rolling resistance.

Information on work in the Netherlands to implement noise-level labeling for roads (in a format similar to that used in Europe for labeling energy efficiency of household appliances).

Updated version of document GRB/2017/2 pursuant to discussions during the 2nd ASEP II informal group session.

OICA proposal to provide a clearer and more precise definition for “stable acceleration”. The definition introduced in document GRB/2017/02 is specified as "when the acceleration from line AA’ to PP’ has a low variation to the acceleration from line PP’ to BB’.” The term “low variation” is imprecise and so OICA proposes the wording “when the acceleration ratio a_{(PP’-BB’)}/a_{(AA’-BB’)} is lower than 1,2.”

Discussion of current issues related to vehicle noise levels, especially given the availability of affordable electronic devices that enable car owners to artificially increase vehicle sound output.

Presentation of concerns and possible responses through GRB regarding vehicle noise, especially related to system tampering and vehicle modifications.

Explanation of the proposals contained in documents GRB/2017/2 and GRB-65-26.

ASEP II informal group amendments to document GRB/2017/2. See document GRB-65-25 for additional explanations.

Presentation on legal requirements (push) and public education/incentivization (pull) strategies to decrease road noise levels. The presentation especially addresses the Dutch interest in a road labeling system for rating road surface noise levels.

Presentation updated to include revisions to the working document GRB/2017/2 as agreed during the 2nd ASEP II informal group session to be presented during GRB-65 as an informal document amending the draft Supplement 2 to the 03 series of amendments to UN R51.

Presentation concerning vehicle noise relationship to speed and acceleration and other factors