107. The representative of the United States of America, Chair of the informal working group on Quiet Road Transport Vehicles (QRTV), reported on the progress of the group. He informed AC.3 that the first meeting of the group took place in Washington, D.C. during 18-19 July 2012 at the NHTSA headquarters and that the discussion highlights included:
(i) a review of testing methodology for alert sound used in his country,
(ii) a presentation by the expert from EC on CARS 21 activities and
(iii) detailed look at the draft ISO 16254 (measurement of minimum noise emitted by road vehicles).

He added that the next meeting of the group was planned to take place in Berlin during 5-7 December 2012 to begin developing the UN GTR considering:
(i) the recommendation of the previous informal working group on QRTV,
(ii) the UN guidelines for alert sounds contained in R.E.3 and
(iii) the Notice of Proposed Rulemaking (NPRM) expected to be published soon in his country.

53. The expert from the United States, informed GRSP about the second meeting of the informal working group on QRTV held in Berlin on 5-7 December 2012. He explained that the group started to develop the UN GTR on the basis of the recommendation of the UN guidelines for alert sound contained in the Consolidated Resolution on the Construction of Vehicles (R.E.3) and on the recommendation of the previous informal working group. He informed GRSP about the intention of NHTSA to publish in January 2013 the Notice of Proposed Rulemaking (NPRM) that is to be considered at the next meeting of the informal working group.