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)
- Headlamps for light based driver assistance ↗ · 2008 · paper relates to standard · 0.71 (embedding)
- Connected vehicle applications for adaptive overhead lighting (on-demand lighting) : final research report. · 2016 · paper relates to standard · 0.65 (embedding)
- The Twilight Envelope: A User-Centered Approach to Describing Roadway Illumination at Night ↗ · 2001 · paper relates to standard · 0.63 (embedding)
- Quantifying the Night Driver's Visual Environment · 1980 · 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)
- Design Criteria for Adaptive Roadway Lighting · 2014 · paper relates to standard · 0.63 (embedding)
- Public Roads: A Journal of Highway Research, Vol. 36. No. 12 · 1972 · paper relates to standard · 0.63 (embedding)
- The Relation between and Driving Behavior Discomfort Glare · 1996 · paper relates to standard · 0.62 (embedding)
- FMVSS Considerations for Vehicles with Automated Driving Systems: Volume 2 · 2021 · paper relates to standard · 0.62 (embedding)
- Driver Vision: Bibliography · 1963 · paper relates to standard · 0.62 (embedding)
- A Safety Evaluation of UVA Vehicle Headlights · 1998 · paper relates to standard · 0.62 (embedding)
- Evaluation of the Impact of Spectral Power Distribution on Driver Performance · 2015 · paper relates to standard · 0.61 (embedding)
- Breakthroughs in Vision and Visibility for Highway Safety: Workshop Summary Report, August 13-14, 2014 · 2015 · paper relates to standard · 0.61 (embedding)
- Using Lighting And Visual Information To Alter Driver Behavior · 2012 · paper relates to standard · 0.61 (embedding)
- Enhanced Night Visibility Series, Volume XVI : Phase III, Characterization of Experimental Objects · 2005 · paper relates to standard · 0.60 (embedding)
- FMVSS Considerations for Vehicles with Automated Driving Systems: Volume 4 · 2025 · paper relates to standard · 0.60 (embedding)
- FMVSS Considerations for Vehicles with Automated Driving Systems: Volume 3 · 2025 · paper relates to standard · 0.60 (embedding)
- Assessment of headlamp glare and potential countermeasures : the effects of headlamp mounting height · 2008 · paper relates to standard · 0.60 (embedding)