- DDT
“Dynamic Driving Task (DDT)” means the real-time operational and tactical functions required to operate the vehicle.
- 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.)
- GRE
Working Party on Lighting and Light-signalling Equipment (cf French: Groupe de Rapporteurs sur l’Eclairage)
- GRSG
Working Party on General Safety (cf French: Groupe de Rapporteurs sur la Sécurité Générale)
- GRSP
Working Party on Passive Safety (cf French: Groupe de Rapporteurs sur la Sécurité Passive)