| GTR No. 2 WMTC | Motorcycle Emissions and Fuel Consumption | Measurement procedure for two-wheeled motorcycles equipped with a positive or compression ignition engine with regard to the emission of gaseous pollutants, CO2 emissions and fuel consumption WMTC Motorcycle Emissions and Fuel Consumption GTR No. 2 GTR No. 2 | GTR | 2 | |
| GTR No. 4 WHDC | Worldwide Heavy-Duty Vehicle Emissions Certification Procedure | Global Technical Regulation No. 4: Test Procedure for Compression-ignition (C.I.) Engines and Positive-ignition (P.I.) Engines Fuelled with Natural Gas (NG) or Liquefied Petroleum Gas (LPG) with regard to the Emission of Pollutants The Informal Group on Heavy-Duty Hybrids expects to deliver its final draft amendment to GTR No.4 at the January 2014 session of GRPE. This amendment would extend GTR No. 4 to include test procedures to evaluate hybrid heavy-duty vehicles. WHDC Worldwide Heavy-Duty Vehicle Emissions Certification Procedure GTR No. 4 GTR No. 4 | GTR | 4 | |
| GTR No. 5 OBD | On-Board Diagnostic Systems | Technical requirements for on-board diagnostic systems (OBD) for road vehicles OBD On-Board Diagnostic Systems GTR No. 5 GTR No. 5 | GTR | 5 | |
| GTR No. 10 OCE | Off-Cycle Emissions | Off-cycle emissions OCE Off-Cycle Emissions GTR No. 10 GTR No. 10 | GTR | 10 | |
| GTR No. 11 NRMM Emissions | Non-Road Mobile Machinery Emissions | Test procedure for compression-ignition engines to be installed in agricultural and forestry tractors and in non-road mobile machinery with regard to the emissions of pollutants by the engine NRMM Emissions Non-Road Mobile Machinery Emissions GTR No. 11 GTR No. 11 | GTR | 11 | |
| GTR No. 15 WLTP | Worldwide Harmonized Light Vehicle Emissions Test Procedure | Worldwide Harmonized Light Vehicles Test Procedure <p>This GTR prescribes a test cycle and test procedures to measure the emissions (including off-cycle) and fuel efficiency of light-duty vehicles. The GTR was adopted at the March 2014 session of the World Forum.</p> <p>A supplemental "phase 1b" is underway to refine certain elements of the initial regulation. WP.29/AC.3 expects to consider a proposal for Amend. 1 to UN GTR No. 15 in November 2016 as result of Phase 1b activities.</p> <p>A second phase is expected to address low ambient temperature, high altitude test procedures, and possibly durability and conformity issues.</p> <p>A third phase would eventually include the addition of reference fuels, correlation across existing regional/national cycles, and introduction of emissions limits.</p> <p>The <a href="https://wiki.unece.org/display/trans/Latest+GTR+15" target="_blank">latest draft version</a> of the amended GTR is regularly updated by the WLTP informal working group.</p> <p>The regulation is also supplemented by a <a href="https://wiki.unece.org/display/trans/Gearshift+calculation+tool" target="_blank">gearshift calculation tool</a>. WLTP Worldwide Harmonized Light Vehicle Emissions Test Procedure GTR No. 15 GTR No. 15 | GTR | 15 | |
| GTR No. 17 Motorcycle Evaporative Emissions | Motorcycle crankcase and evaporative emissions | Measurement procedure for two- or three-wheeled light motor vehicle equipped with a combustion engine with regard to the crankcase and evaporative emissions. Motorcycle Evaporative Emissions Motorcycle crankcase and evaporative emissions GTR No. 17 GTR No. 17 | GTR | 17 | |
| GTR No. 18 L-OBD | Motorcycle On-Board Diagnostic Systems | Project to establish a Global Technical Regulation and its homologous UN Regulation for motorcycle and moped on-board diagnostic systems. L-OBD Motorcycle On-Board Diagnostic Systems GTR No. 18 GTR No. 18 | GTR | 18 | |
| GTR No. 19 Evaporative emissions | Motor vehicle evaporative emissions | Under the Phase 2 development of GTR No. 15, the WLTP informal group began considering evaporative emissions. This resulted in the adoption of GTR 19 on Evaporative Emissions under the WLTP test cycle in June 2017. Evaporative emissions Motor vehicle evaporative emissions GTR No. 19 GTR No. 19 | GTR | 19 | |
| GTR No. 21 EV Power Determination | Electric Vehicle System Power Determination | EV Power Determination Electric Vehicle System Power Determination GTR No. 21 GTR No. 21 | GTR | 21 | |
| GTR No. 22 EV Battery Durability | Electrified Vehicle Battery Durability | In-vehicle Battery Durability for Electrified Vehicles Program under the EVE informal group to develop a new UN Global Technical Regulation. EV Battery Durability Electrified Vehicle Battery Durability GTR No. 22 GTR No. 22 | GTR | 22 | |
| GTR No. 23 L-vehicle Pollution Control Durability | Durability of L-category Vehicle Pollution Control Devices | Requirements for Two- and Three-wheeled Light Motor Vehicles with regard to the Durability of the Pollution Control Devices This proposed global technical regulation would supplement the three main environmental performance verification test types (i.e., I, II, and VII as envisioned for GTR No. 2 by the Informal Working Group on Environmental and Propulsion Performance Requirements of L-category vehicles (EPPR)) with procedures for verifying pollution device/system durability. This effort includes both the development of the GTR and its UN Regulation counterpart. For convenience, materials concerning both efforts are grouped here. L-vehicle Pollution Control Durability Durability of L-category Vehicle Pollution Control Devices GTR No. 23 GTR No. 23 | GTR | 23 | |
| GTR No. 24 Brake Emissions | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles | Foundational documents for the discussion on a new GTR for brake emissions can be found <a href="https://wiki.unece.org/display/trans/GTR+Brake+emissions+-+informal+documents" target="_blank">here</a>. Brake Emissions Laboratory Measurement of Brake Emissions for Light-Duty Vehicles GTR No. 24 GTR No. 24 | GTR | 24 |