5 May 2015 Development of an exhaust emission and CO 2 measurement test procedure for heavy-duty hybrids: Final report (Chalmers, TU Graz, TU Wien, IFA, and ACEA) HDH Informal Group General Files-25 2015-05-05
8 Mar 2015 Consideration and vote by AC.3 of draft global technical regulations and/or amendments WP.29-165-09 2015-03-08
6 Feb 2015 Updated VPSD revisions to the draft amendment to GTR No. 4 concerning heavy-duty hybrids: Revision 2 VPSD-05-07/Rev.2 2015-02-06
15 Jan 2015 Proposal for amendments to the draft Amendment 3 to GTR No. 4 (OICA) GRPE-70-18 2015-01-15
14 Jan 2015 Comparison of Heavy Duty Hybrid Test Procedures Drafted in GTR No. 4 (USA and US EPA) GRPE-70-15 2015-01-14
13 Jan 2015 VPSD revisions to the draft amendment to GTR No. 4 concerning heavy-duty hybrids VPSD-05-05 2015-01-13