UN ECE R123
Uniform provisions concerning the approval of adaptive front-lighting systems (AFS) for motor vehicles
| Issuing body | UNECE |
|---|---|
| Committees | UNECE (WP.29, GRE) |
| First issued | 2007 |
| Latest revision | 2019 |
| Status | active |
| Category | international |
| Topics | glare, headlamp_performance, night_driving, visual |
| Reference | https://unece.org/transport/vehicle-regulations-wp29/standards/addenda-1958-agreement-regulations-121-140 |
Scope
Approval of adaptive front-lighting systems (AFS) for vehicles of categories M and N, which automatically vary the headlamp beam pattern (e.g. town, motorway, adverse-weather, bending-light and glare-free high-beam modes) according to driving conditions. Governs how the illuminated scene presented to the driver changes with speed, steering and oncoming traffic, balancing forward visibility against glare to others. Performance for new types is now also covered by R149.
Related Papers (20)
- Perceived Discomfort Glare from an Adaptive Driving Beam Headlight system Compared with Three Low Beam Lighting Configurations ↗ · 2015 · paper relates to standard · 0.75 (embedding)
- Adaptive Driving Beam - Visibility Improvement versus Glare ↗ · 2014 · paper relates to standard · 0.72 (embedding)
- Headlamps for light based driver assistance ↗ · 2008 · paper relates to standard · 0.71 (embedding)
- An Adaptive Driving Beam System based on the Angle Information of the Opposite Vehicle ↗ · 2021 · paper relates to standard · 0.67 (embedding)
- EVALUATION OF THE FEASIBILITY OF A SINGLE-BEAM HEADLIGHTING SYSTEM ↗ · 1979 · paper relates to standard · 0.67 (embedding)
- THE EFFECT OF WIDE-ANGLE HEADLIGHT ILLUMINATION ON DRIVER PERFORMANCE ↗ · 1979 · paper relates to standard · 0.67 (embedding)
- Autonomous vehicle front lighting systems ↗ · 2012 · paper relates to standard · 0.67 (embedding)
- ROad-VEhicle Lighting Integration A Study Of The Phase-1 Roveli System ↗ · 2005 · paper relates to standard · 0.65 (embedding)
- Connected vehicle applications for adaptive overhead lighting (on-demand lighting) : final research report. · 2016 · paper relates to standard · 0.65 (embedding)
- Highway Safety with an Intelligent Headlight System for Improved Nighttime Driving · 2024 · paper relates to standard · 0.65 (embedding)
- IMPROVED LOW-BEAM PHOTOMETRICS ↗ · 1983 · paper relates to standard · 0.64 (embedding)
- Methodology to Assess Headlamp Performance in Virtual Environment and its Correlation with Real World Driving Conditions ↗ · 2021 · paper relates to standard · 0.64 (embedding)
- Driver Behavior as a Function of Ambient Light and Road Geometry ↗ · 2003 · paper relates to standard · 0.64 (embedding)
- The Twilight Envelope: A User-Centered Approach to Describing Roadway Illumination at Night ↗ · 2001 · paper relates to standard · 0.63 (embedding)
- A Novel Way of Optimizing Headlight Distributions Based on Real-Life Traffic and Eye Tracking Data Part 3: Driver Gaze Behaviour on Real Roads and Optimized Light Distribution ↗ · 2023 · paper relates to standard · 0.63 (embedding)
- Quantifying the Night Driver's Visual Environment · 1980 · paper relates to standard · 0.63 (embedding)
- INTERACTION BETWEEN FIXED AND VEHICULAR ILLUMINATION SYSTEMS ↗ · 1972 · paper relates to standard · 0.63 (embedding)
- Roadside Assistance Vehicle Lighting: Review of Scientific Research and State Regulations · 2025 · paper relates to standard · 0.63 (embedding)
- FMVSS Considerations for Vehicles with Automated Driving Systems: Volume 1 · 2020 · paper relates to standard · 0.63 (embedding)
- Public Roads: A Journal of Highway Research and Development, Vol. 51 No. 2 · 1987 · paper relates to standard · 0.63 (embedding)