TF GP gives a list of items for consideration by GRE

The Task Force on Glare Prevention, Homework teams examined literature (TFGP-06-02), Periodical Technical Inspections (TFGP-07-02), ADB/AFS Regulation 48 (TFGP-07-03), and contributions from GTB (TFGP-07-04, TFGP-07-05) and CITA (TFGP-05-02, TFGP-07-07). The Task Force is preparing draft recommendations on the first step regarding retroreflective identification devices and draft countermeasures, with further recommendations on second-step glare from light signalling devices and DRL planned for October 2026.

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.

TFGP-07-08 provides a draft list of recommendations for GRE-94 addressing glare prevention. Recommendations include providing driver instructions for manual override of adaptive driving beam in case of glare; considering dynamic auto-levelling for all vehicles; lowering maximum installation height of headlamps; investigating aiming differences; defining limits on maximum luminous flux and intensity output; improving adaptive driving beam requirements; introducing motorway adaptive driving beam usage; reducing the 2000 lm limit or making cleaning mandatory; considering dimming of beam pattern; introducing adaptive cut-off line; clarifying definitions for cut-off line; improving connection between type approval and inspection; clarifying practical periodic technical inspection aspects; defining remedies for alignment degradation; defining uniform requirements for floor evenness and headlamp aiming devices; improving market surveillance; and improving driver awareness on headlamp cleaning and levelling systems.

Document identifies challenges with headlamp aiming for glare prevention. UP-DOWN aiming challenges include vehicle actual load and cut-off line definition. LEFT-RIGHT aiming challenges include references on the vehicle and kink point definition. Cut-off line definition makes it difficult to check up-down aiming; kink point definition makes it difficult to check left-right aiming. The beam pattern must be used to check alignment. The way forward includes reviewing criteria for passing-beam orientation in approval and adapting inspection criteria accordingly.

The hard-working team identified glare issues in four areas: aiming procedures lack clear definitions of cut-off line and kink point, making PTI inspection difficult; high-mounted headlamps tend to glare lower vehicles in front, and cleaning hardware and auto-levelling performance are insufficient; PTI lacks a dedicated chapter on provisions; and measurements using 75 kg on driver’s seat are impractical, alignment is not mandated at end-of-line, and no general requirements exist for headlamp testers.

The GTB Glare Task Force defined countermeasures for critical glare types, categorizing them as Regulation, Technology, Individual, or Workshop measures. Proposed solutions address specific glare sources including climbing roads, left bends, high beam misuse, and vehicle acceleration. Countermeasures range from short-term driver education to long-term mandatory technologies. Future work includes quantifying effectiveness and addressing less critical glare events.

Recommendations span general measures including market surveillance and headlamp cleaning enforcement; literature review of installation heights and luminous flux limits in UN R48; technology improvements to Adaptive Driving Beam and dynamic levelling; infrastructure and driver awareness enhancements; regulation refinements; enforcement of aiming standards; and PTI provisions clarifying measurement definitions, floor requirements, and ADB/AFS specifications including latency, vehicle detection, and adaptive cut-off lines.

The agenda includes status updates from hard-working teams on PTI and ADB/AFS, updates from the GTB Task Force on Glare Control, and discussion of draft recommendations for GRE-94. Future meetings are scheduled for June 2026 in Brussels and September 2026 in Tokyo.