SOURCE-LINKED REGULATION GUIDE
UN R123 — Adaptive front-lighting systems
Explore AFS light functions together with the system’s control architecture.
Explore the scopeWhat does it cover?
UN R123 addresses adaptive front-lighting systems (AFS) for M- and N-category vehicles. They provide different light distributions to adapt the passing beam, and where present the driving beam, automatically to changing driving conditions. The regulation defines lighting units, installation units and system control, treating AFS as more than one lamp.
Who is it for?
Lighting manufacturers developing AFS, vehicle-integration teams and photometry specialists.
Which subjects are addressed?
- Adaptive lighting functions
- Passing-beam classes and modes
- Lighting and installation units
- System control
Common question
Is an AFS just one light source?
No. The text defines the system through its control, left and right installation units and associated power and operating elements. Approval of a light source and approval of the system have different scopes.
Source documents and references
Work with this regulation in RegsUP.
Read the text with its edition and sources. Assess available comparisons, relevant dates and question-and-answer features against your work needs.
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