| 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. 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. 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 |