UN ECE R148
Uniform provisions concerning the approval of light-signalling devices (lamps) for power-driven vehicles and their trailers
| Issuing body | UNECE |
|---|---|
| Committees | UNECE (WP.29, GRE) |
| First issued | 2019 |
| Latest revision | 2023 |
| Status | active |
| Category | international |
| Topics | night_driving, signal_perception, vehicle_conspicuity, visual |
| Reference | https://unece.org/sites/default/files/2021-05/R148e.pdf |
Scope
Consolidated performance regulation for light-signalling devices (LSD): direction-indicator, stop, position, end-outline, reversing, fog and other signal lamps. Streamlines and supersedes the older device regulations (R4, R6, R7, R23, R38, R50, R77, R87, R91) for new types. Specifies luminous intensity, colour and geometry of the signals other drivers must perceive and correctly interpret, governing the conspicuity and legibility of a vehicle's communicative lighting.
Related Papers (20)
- Public Roads: A Journal of Highway Research and Development, Vol. 51 No. 2 · 1987 · paper relates to standard · 0.68 (embedding)
- Roadside Assistance Vehicle Lighting: Review of Scientific Research and State Regulations · 2025 · paper relates to standard · 0.67 (embedding)
- Overhead guide sign retroreflectivity and illumination. · 2015 · paper relates to standard · 0.64 (embedding)
- Driver Vision: Bibliography · 1963 · paper relates to standard · 0.64 (embedding)
- An Investigation of the Design and Performance of Traffic Control Devices · 1968 · paper relates to standard · 0.64 (embedding)
- Minimum retroreflectivity levels for overhead guide signs and street-name signs · 2003 · paper relates to standard · 0.64 (embedding)
- Minimum Retroreflectivity Requirements for Traffic Signs · 1993 · paper relates to standard · 0.63 (embedding)
- Traffic Signal Brightness: An Examination of Nighttime Dimming · 1985 · paper relates to standard · 0.63 (embedding)
- CHARACTERISTICS AND NEEDS FOR OVERHEAD GUIDE SIGN ILLUMINATION FROM VEHICULAR HEADLAMPS ↗ · 1999 · paper relates to standard · 0.62 (embedding)
- Traffic control device evaluation program : FY 2016. · 2017 · paper relates to standard · 0.61 (embedding)
- UNECE transport review : first edition--November 2008. · 2008 · paper relates to standard · 0.61 (embedding)
- UPDATED MINIMUM RETROREFLECTIVITY LEVELS FOR TRAFFIC SIGNS ↗ · 2003 · paper relates to standard · 0.61 (embedding)
- Use of high intensity reflective sheeting in lieu of external lighting of overhead roadway signs. · 2013 · paper relates to standard · 0.61 (embedding)
- Nighttime Highway Construction Illumination [URTC Report] · 2014 · paper relates to standard · 0.61 (embedding)
- Workshop on Field Inspection and Rehabilitation of Traffic Control Devices - Proceedings · 1990 · paper relates to standard · 0.61 (embedding)
- Study to Understand the Influence of Emergency Vehicle Color, Reflectance, Signing/Arrow Boards, and Lighting Configurations in Reducing Responder Involved Crashes · 2025 · paper relates to standard · 0.61 (embedding)
- Work vehicle warning lights : color options and effectiveness. · 2015 · paper relates to standard · 0.61 (embedding)
- Sign Luminance Requirements for Various Background Complexities · 1985 · paper relates to standard · 0.61 (embedding)
- Field evaluation of unlighted overhead guide signs using older drivers : final report, August 2003. · 2003 · paper relates to standard · 0.61 (embedding)
- Changeable Message Sign Visibility · 1996 · paper relates to standard · 0.61 (embedding)