UN R48 Supplement 6 (08 series) · UNECE Regulation No. 48 (ECE R48) — Uniform provisions concerning the approval of vehicles with regard to the installation of lighting and light-signalling devices.
UN R48 — Supplement 6 to the 08 series of amendments
Supplement 5 → 6
- What changed
- New paragraph 5.35.12.1. sets the width limits for a Driver Assistance Projection for predicted trajectory, with a maximum of 2,600 mm.
- At the manufacturer's choice, the failure tell-tale may be activated by a failure signal of UN Regulation No. 149, 01 and later series.
- For headlamp cleaning, the 2,000 lumens limit of paragraph 6.2.9.2. now applies to at least one headlamp, not to each headlamp.
- Why
- The proposal states that the predicted trajectory projection will improve road safety by giving valuable assistance to the driver.
- The failure requirements for passing beams that use multiple light sources needed to be extended and improved for new technologies.
- The changes to paragraphs 6.2.9.2., 6.2.9.3. and 6.22.9.1. are intended to align UN Regulation No. 48 with the 01 series of UN Regulation No. 149.
Q1What changed15 changes
Predicted trajectory projection (paras. 5.35.10. to 5.35.12.1.)
Paragraph 5.35.10. adds predicted trajectory to the exceptions from the 65 km/h switch-ON limit. Paragraph 5.35.11. limits the lateral distance from the outer edges of the projection to 1,250 mm. The distance is with respect to the longitudinal median plane or to the trajectory of the centre of gravity of the vehicle. This limit now does not apply to predicted trajectory. For predicted trajectory illustrated in Annex 16, the projection may be adapted according to the predicted trajectory of the vehicle's centre of gravity. It must not be wider than the width of the vehicle, including any fitted accessories and trailer if applicable, and not more than 2,600 mm.
Predicted trajectory in Annex 16
Annex 16 now lists “Predicted trajectory”. Its figure shows an example of the basic quadrilateral shape of the projection, seen from the driver’s perspective of a car in straight forward motion. The dashed lines in the figure are not part of the projection. The shape may change when adapted in conformity with paragraph 5.35.12.
Demonstration of compliance (para. 5.35.13.)
Compliance with paragraphs 5.35.11. and 5.35.12.1. must be demonstrated by the manufacturer by calculation or by other means accepted by the Type Approval Authority. Before this supplement, the sentence began “This shall be demonstrated” and did not name the paragraphs.
Failure tell-tale for the principal dipped-beam (para. 6.2.8.2.)
Paragraph 6.2.8.2. now says “A tell-tale indicating failure” instead of “A visual failure tell-tale”. Item (b) of the activation conditions now gives two options at the discretion of the manufacturer. The first option is a failure of any one of the LED module(s) producing the principal dipped-beam, as before. This option excludes LED modules wired so that the failure of any one LED module causes all of them to stop emitting light. The new second option is a failure signal in accordance with paragraph 4.13. of UN Regulation No. 149 (01 and later series). In any case, once activated, the tell-tale must remain activated while the failure is present.
Headlamp cleaning and light source modules (paras. 6.2.9.2., 6.2.9.3. and 6.22.9.1.)
Paragraphs 6.2.9.2. and 6.2.9.3. now say “light source(s) and/or light source module(s)” instead of “a light source or LED module(s)”. Paragraph 6.2.9.2. now applies the 2,000 lumens limit to “at least one headlamp”. Before this supplement, it said “for each headlamp”. In paragraph 6.22.9.1., the AFS condition now refers to the flux of the “light source(s) and/or light source module(s)” of the units. The limit now reads “2,000 lm at least on one side” instead of “2,000 lm per side”.
Cut-off inclination for off-road vehicles (para. 6.2.6.1.2.)
For N2G, N3G, M2G and M3G (off-road) vehicles with headlamps above 1,200 mm, the cut-off inclination limits are -1.5 and -3.5 per cent. Categories N2G, M2G and M3G are new in this sentence. Before this supplement, it said “For category N3G (off-road) vehicles”.
Q2Why it changed
- Proposed by
- Experts from the International Automotive Lighting and Light-Signalling Expert Group (GTB)
- Working party
- GRE, 91st session (October 2024)
Reasons
The proposal states that the projection of a predicted trajectory will improve road safety by giving valuable assistance to the driver. The proposal also states that other means, such as a heads-up display (HUD) or the dashboard, cannot give this feature to the driver.
Sources (2)
“The projection of a predicted trajectory will improve road safety by providing valuable assistance to the driver while driving the vehicle.”
“this DAP is a feature that cannot be provided to the driver by other means, such as a heads-up display (HUD) or dashboard.”
Passing beams with a large number of elements for visible radiation are now available. A failure of any first of these elements does not lead to a lack of performance in photometric values. For this reason, the failure requirements for passing beams with multiple light sources need to be extended and improved.
Sources (2)
“passing beams constituted of a large number of elements for visible radiation are presently available, where a failure of any first of these does not consequentially lead to a lack of performance in photometric values.”
“the requirements regarding failures in passing beam using multiple light sources need to be extended and improved.”
The latest provisions in the 01 series of UN Regulation No. 149 require the communication form to show whether the dipped-beam flux exceeds 2,000 lumens. This covers the total objective luminous flux of one or more light source(s) or light source module(s). UN Regulation No. 48 referred only to a light source or LED module(s) for the dipped beam. The changes are intended to align UN Regulation No. 48 with these updated requirements, to avoid inconsistencies.
Sources (3)
“require to indicate in the communication form whether or not the total objective luminous flux of one or more light source(s) or light source module(s) for a dipped beam exceeds 2,000 lumens.”
“However, UN Regulation No. 48 presently refers only to a light source or ligh-emitting diode (LED) module(s) for dipped beam”
“The proposed modifications are intended to align the requirements in UN Regulation No. 48 with the updated requirements in the 01 series of amendments to UN Regulation No. 149”
The term “LED module” is replaced by “Light source module” for reasons of technological neutrality. The words “at least” in paragraphs 6.2.9.2. and 6.22.9.1. adapt these provisions to the “matched pair” requirements for headlamps and AFS.
Sources (2)
“The term “LED module” has been replaced by “Light source module” for technological neutralty reasons.”
“The addition of the words “at least’’ in paragraphs 6.2.9.2. and 6.22.9.1. is necessary to adapt the application of this provisions to the introduction of “matched pair” requirements for headlamps and AFS.”
The 09 series of amendments to UN Regulation No. 48 clarified the passing-beam vertical inclination requirements for M2G, M3G, N2G and N3G (off-road) vehicles. The proposal is intended to align these requirements by extending the 09 series provisions to the 06, 07 and 08 series of amendments.
Sources (2)
“The 09 series of amendments to UN Regulation No. 48 has clarified the requirements for M2G, M3G, N2G and N3G (off-road) vehicles about the passing-beam vertical inclination depending on the mounting height of the headlamps.”
“This proposal is intended to align these requirements among the different series of amendments by extending the provisions in the 09 series to the 06, 07 and 08 series of amendments to UN Regulation No. 48.”
Document trail
- 2024-02ProposalECE/TRANS/WP.29/GRE/2024/3GTB proposal to align with UN Regulation No. 149
- 2024-02ProposalECE/TRANS/WP.29/GRE/2024/4GTB proposal on the cut-off inclination for off-road vehicles
- —Working party adoptsECE/TRANS/WP.29/GRE/90GRE session report, para. 13: adoption in principle, submission postponed
- 2024-08ProposalECE/TRANS/WP.29/GRE/2024/15Revised GTB proposal for the predicted trajectory projection
- 2024-08ProposalECE/TRANS/WP.29/GRE/2024/22GTB proposal on failure detection and signalisation
- —Working party adoptsECE/TRANS/WP.29/GRE/91GRE session report, paras. 15, 24 and 27
- 2024-12Sent to WP.29ECE/TRANS/WP.29/2025/35Text that GRE sent to WP.29 and AC.1
- 2025-03WP.29 adoptsECE/TRANS/WP.29/1184Adopted at the 195th session (session report, para. 109)
- 2025-09-26In forceC.N.512.2025.TREATIES-XI.B.16.48UN depositary notification
Q3Who is affected
Vehicle manufacturer
- Limit a predicted trajectory projection to the vehicle width with fitted accessories and trailer, if applicable, and to 2,600 mm.
- Demonstrate compliance with paragraphs 5.35.11. and 5.35.12.1. by calculation or by other means accepted by the Type Approval Authority.
- Choose which option of item (b) in paragraph 6.2.8.2. activates the failure tell-tale.
- Fit headlamp cleaning when at least one headlamp's principal dipped beam has a total objective luminous flux over 2,000 lumens. Use device(s) according to UN Regulation No. 45.
- For an AFS, check the flux of the lighting units in paragraph 6.22.9.1. against “2,000 lm at least on one side”.
- Apply -1.5 to -3.5 per cent cut-off limits to off-road N2G, N3G, M2G and M3G with headlamps above 1,200 mm.
Component supplier
- Tell the vehicle manufacturer which headlamps give a failure signal under UN Regulation No. 149 (01 series or later).
- Give the vehicle manufacturer the total objective luminous flux of each dipped-beam headlamp.
Technical service / Approval authority
- Check the manufacturer's calculation or other means that show compliance with paragraphs 5.35.11. and 5.35.12.1.
- Do not apply the 65 km/h switch-ON limit of paragraph 5.35.10. to predicted trajectory.
- Check the predicted trajectory pattern against Annex 16 and paragraph 5.35.12.1.
- Check the failure tell-tale against the option of item (b) in paragraph 6.2.8.2. that the manufacturer chose.
- Check N2G, M2G and M3G off-road vehicles with headlamps above 1,200 mm against the -1.5 to -3.5 per cent limits.
- Check headlamp cleaning against “at least one headlamp” in paragraph 6.2.9.2. and “at least on one side” in paragraph 6.22.9.1.
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ⓘ This report gives advice only. It is not legal or type-approval advice.
More UN R48 change reports
- 09 series — Supplement 4
- 09 series — Supplement 3
- 09 series — Supplement 2
- 09 series — Supplement 1
- 09 series — Base text
- 08 series — Supplement 9
- 08 series — Supplement 8
- 08 series — Supplement 7
- 08 series — Supplement 5
- 08 series — Supplement 4
- 08 series — Supplement 3
- 08 series — Supplement 2
- 08 series — Supplement 1
- 08 series — Base text
- 07 series — Supplement 11
- 07 series — Supplement 10
- 07 series — Supplement 9
- 07 series — Supplement 8
- 07 series — Supplement 7
- 07 series — Supplement 6
- 07 series — Supplement 5
- 07 series — Supplement 4
- 07 series — Supplement 3
- 07 series — Supplement 2
- 07 series — Supplement 1
- 07 series — Base text
- 06 series — Supplement 24
- 06 series — Supplement 23
- 06 series — Supplement 22
- 06 series — Supplement 21
- 06 series — Supplement 20
- 06 series — Supplement 19
- 06 series — Supplement 18
- 06 series — Supplement 17
- 06 series — Supplement 16
- 06 series — Supplement 15
- 06 series — Supplement 14
- 06 series — Supplement 13
- 06 series — Supplement 12
- 06 series — Supplement 11