- EDR
Event Data Recorder
- GR
from the French “Groupe de Rapporteurs”; signifies any of the permanent working parties subsidiary to WP.29 (e.g. on noise, lighting, pollution and energy, passive safety, etc.)
- GRSG
Working Party on General Safety (cf French: Groupe de Rapporteurs sur la Sécurité Générale)
- GTR
Global Technical Regulation
- ITC
Inland Transport Committee: An intergovernmental forum where the UNECE and United Nations Member States come together to forge tools for economic cooperation and negotiate and adopt international legal instruments on inland transport.
- NHTSA
- National Highway Traffic Safety Administration
- UNECE
United Nations Economic Commission for Europe