European Agreement concerning the International Carriage of Dangerous Goods by Road
EDR
Event Data Recorder
GRSG
Working Party on General Safety (cf French: Groupe de Rapporteurs sur la Sécurité Générale)
IWG
Informal Working Group: A group of experts authorized to develop proposals for consideration by WP.29 without being bound by formal UN rules of procedure.
VRU
Vulnerable Road User: A person using the road who lacks the protection of an outer vehicle shell or equivalent restraint system, and who is therefore at disproportionate risk of serious injury or death in a collision involving motorized traffic.