UNECE R123: the regulation governing Adaptive Front-lighting Systems (AFS).

UNECE Regulation R123 defines the technical requirements and test procedures for Adaptive Front-lighting Systems (AFS) installed on M and N category vehicles. With an increasingly central role in modern road safety, R123 establishes uniform standards that allow manufacturers to develop intelligent lighting solutions capable of improving visibility without compromising the comfort of other road users.

What is UNECE R123?

UNECE R123 is the regulation that defines the operation and type-approval process for AFS – Adaptive Front-lighting Systems, lighting systems that automatically adjust the beam pattern according to driving conditions. Its primary goal is to increase safety and guarantee optimal illumination in all contexts, reducing the risk of glare.

How AFS Work According to R123

AFS regulated under R123 adjust the light beam based on:

  • Vehicle speed

  • Road curvature

  • Weather conditions (rain, fog, snow)

  • Surrounding environment (urban, extra-urban, motorway)

  • Traffic conditions

This makes illumination dynamic and “intelligent,” enhancing safety and improving the driving experience.

Main Lighting Modes Defined by R123

UNECE R123 identifies several lighting classes, each designed for specific situations:

Class C – Basic Lighting
The standard mode suitable for most road conditions, offering balance between visibility and glare reduction.

Class V – Motorway
Provides a longer and narrower beam, improving long-distance visibility at high speeds.

Class E – Extra-urban
Designed for extra-urban roads, offering increased lateral illumination and beam depth.

Class T – Urban Use
A wider and shorter beam optimized for low speeds and city traffic.

Class W – Adverse Weather
Reduces reflections on rain, snow and fog, improving road perception.

Why UNECE R123 Is Essential for Manufacturers

Adopting R123 ensures internationally harmonized standards, simplifying the approval process for AFS systems. Key advantages include:

  • Uniform technical requirements across UNECE member countries

  • Streamlined type-approval procedures thanks to harmonized criteria

  • Development of advanced technologies such as adaptive headlights, directional lighting, and matrix LED systems

  • Increased safety for drivers and all road users

In a time when vehicles are increasingly advanced, Regulation R123 is a crucial reference for manufacturers, designers, and industry professionals.

AFS, LED and Matrix Systems: How R123 Integrates

The regulation supports advanced systems such as:

  • Adaptive Driving Beam (ADB)

  • Matrix LED

  • Intelligent directional headlights

These technologies allow, for example, the use of high beams while selectively masking areas where other vehicles are present.
For more advanced high-beam functionalities, R123 interacts with UNECE R149, now the main reference for LED and ADB lighting devices.

Why Choose ATS Group for R123 Type Approval

Relying on ATS Group for the type approval of AFS systems under R123 provides manufacturers with several concrete benefits:

Designated and Recognized Technical Service

ATS Group is a Technical Service designated by multiple national Approval Authorities (including San Marino, Sweden and Ireland), qualified to perform tests, inspections, and certifications in accordance with ECE/UNECE regulations. This means that all certificates issued are official and internationally recognized, a key requirement for R123 approval.

Accreditations and Technical Expertise

ATS Group operates under international accreditations such as ISO/IEC 17020, ISO/IEC 17025, and ISO/IEC 17021-1, ensuring impartiality, competence, and technical rigor in testing and inspections. This level of expertise is essential for meeting the strict safety, photometric and performance requirements defined by R123.

Complete Coverage: Vehicles, Systems, Components

ATS Group provides type approval not only for complete vehicles but also for components, systems, and independent technical units. For AFS/Matrix/LED systems regulated by R123 (and related regulations), this flexibility allows manufacturers to certify each element individually as well as the final vehicle.

Efficiency and Reduced Certification Time

Thanks to its international structure, its network of accredited laboratories, and its operating capacity across multiple markets, ATS Group can optimize approval timelines and reduce costs, helping manufacturers speed up market entry and minimize risks related to complex approval procedures.

Regulatory Consistency and International Validity

A certificate issued by ATS Group ensures compliance with UNECE requirements, valid in all countries that recognize the regulation. This allows manufacturers to sell vehicles across multiple markets without needing additional national approvals.

Complete Support: Tests, Inspections, and Production Conformity (CoP)

ATS Group offers full support beyond initial testing, including Conformity of Production (CoP) services to ensure that each manufactured unit continues to meet approved standards. This protects manufacturers from production variability and ensures compliant series production.

why choose ats group?

ATS Group is a group of companies operating in the field
of Inspections, Certifications and Type Approvals in the Automotive sector.

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type approval of whole vehicles

ATS Group, through its companies designated by e24 and e5 marks, is able to issue the type approval of complete vehicles.

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type approval of vechicles parts

With the type approval Approval Authority designations (E57), (E5) and (E24) ATS Group is able to carry out approvals of components, systems and technical units of vehicles in general.

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certifications

ATS Europe, as a Certification Body accredited under ISO 17021-1: 2015 as a Certification Body for Quality Management Systems under ISO 9001: 2015, has become a leading company in the field of certifications.

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testing laboratories

The test laboratories affiliated with ATS Group are ISO 17025 accredited, ensuring reliability, accuracy, and compliance with international standards.

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Our proprietary online platform can manage the whole approval process, fron the quotation till the direct download on the final Type Approval Certificate.

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competitives prices based on market analysis

ATS Group offers competitive prices and fast turnaround times, ensuring an efficient and high-quality service to meet customer needs promptly.

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