GRE-94-20
Glare issues: Identifying the issues with headlamp aiming
Source(s)
Date
22 Apr 2026
Status
Subject
Meeting(s)

Identifies challenges with headlamp aiming across approval and inspection processes. Issues include determining vehicle actual load and cut-off line definition for up-down aiming, defining vehicle references and kink point location for left-right aiming, and separating aiming control from beam pattern assessment. Inspection data show rejection rates of 4.8 per cent for light duty vehicles and 2.8 per cent for heavy duty vehicles in France, with front fog lamp misalignment at 46 per cent. The document recommends reviewing approval criteria for passing-beam orientation and defining inspection procedures, equipment, and multibeam headlamp considerations.

UNECE server
Excerpts from session reports
GRE | Session 94 | 27-30 Apr

37. The Task Force on Glare Prevention (TF GP) reported on their progress (GRE-94-21) and presented a draft list of recommendations (GRE-94-22). The expert from CITA identified issues with headlamp aiming and invited TF GP to review the criteria for passing-beam orientation during type approval, to make the aiming check reasonably possible at periodic technical inspection and roadside inspection (GRE-94-20).