This Regulation applies to certain advance-warning devices intended to be on board vehicles and to be placed on the carriageway in order to signal, by day and at night, the presence of a halted vehicle.
This regulation will be superseded by a new UN Regulation on Retro-Reflecting Devices (RRD) under the Simplification of Lighting Regulations program.
| UN R27: Request to consider updates to align with technological progress in warning triangles |
| Reference Number: GRE-90-11 |
| Submitted by: Slovakia |
| Meeting Sessions: 90th GRE session (29 Apr-3 May 2024) |
| Document date: 26 Mar 24 |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| Click here to view the full document file |
| UN R27: Proposal for the 05 series of amendments | |
| Reference Number: WP.29/2018/97/Rev.1 | |
|
Revised proposal from GRE (for the March 2019 WP.29 session) to introduce transitional provisions for the phasing out of UN R27 in conjunction with the introduction of the new UN Regulation on Retro-Reflecting Devices (RRD). |
|
| Meeting Sessions: 176th WP.29 session (12-16 Nov 2018) and 177th WP.29 session (11-15 Mar 2019) | |
| Document date: 17 Dec 18 | |
| Document status: Adopted by WP.29 | |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles | |
| Adoption Vote | |
| This proposal (WP.29/2018/97/Rev.1) was adopted by the World Forum. Thirty-seven Contracting Parties out of the 46 applying UN R27 were present for the vote by AC.1. Thirty-seven voted in favor with zero against and zero abstaining. | |
| View full document file for more information | |
| Click here to view the full document file | |
| UN R27: Proposal for the 05 series of amendments |
| Reference Number: WP.29/2018/97 |
|
Proposal from GRE to introduce transitional provisions for the phasing out of UN R27 in conjunction with the introduction of the new UN Regulation on Retro-Reflecting Devices (RRD). |
| Meeting Sessions: 176th WP.29 session (12-16 Nov 2018) |
| Document date: 03 Aug 18 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| RRD: Draft regulation for the approval of retro-reflecting devices |
| Reference Number: SLR-21-10/Rev.1 |
|
SLR informal group draft for the proposal of a new regulation consolidating all current regulations regarding retro-reflecting devices. This draft UN Regulation combines the provisions of the current Regulations Nos. 3, 27, 69, 70 and 104. |
| Submitted by: CLEPA |
| Meeting Sessions: 21st SLR session (18-21 Dec 2017) |
| Document date: 20 Dec 17 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 3 | Retro-reflecting Devices, UN Regulation No. 27 | Advance Warning Triangles, UN Regulation No. 69 | Rear Marking Plates for Slow-moving Vehicles, UN Regulation No. 70 | Rear Marking Plates for Heavy and Long Vehicles, UN Regulation No. 104 | Retro-reflective Markings, WP.29 Regulatory Project | Simplification of Lighting Regulations, and UN Regulation No. 150 | Retro-reflective Devices and Markings (RRD) |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for Supplement 1 to the 04 series of amendments to Regulation No. 27 | |
| Reference Number: WP.29/2017/25 | |
|
Proposal to clarify the Conformity of Production requirements. |
|
| Meeting Sessions: 171st WP.29 session (14-17 Mar 2017) | |
| Document date: 19 Dec 16 | |
| Document status: Adopted text published | |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles | |
| Adoption Vote | |
| This proposal (WP.29/2017/25) was adopted by the World Forum. Thirty-five Contracting Parties out of the 44 applying UN R27 were present for the vote by AC.1. Thirty-five voted in favor with zero against and zero abstaining. | |
| View full document file for more information | |
| Click here to view the full document file | |
| Draft new regulation on retro-reflecting devices |
| Reference Number: SLR-13-03 |
| Submitted by: Germany |
| Meeting Sessions: 13th SLR session (5-7 Oct 2016) |
| Document date: 01 Oct 16 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles, UN Regulation No. 69 | Rear Marking Plates for Slow-moving Vehicles, UN Regulation No. 70 | Rear Marking Plates for Heavy and Long Vehicles, UN Regulation No. 104 | Retro-reflective Markings, and UN Regulation No. 150 | Retro-reflective Devices and Markings (RRD) |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for the new 04 series of amendments to Regulation No. 27 |
| Reference Number: WP.29/2014/31 |
|
Proposal to clarify the Conformity of Production requirements. |
| Meeting Sessions: 162nd WP.29 session (11-14 Mar 2014) |
| Document date: 18 Dec 13 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for the 04 series of amendments to Regulation No. 27 |
| Reference Number: WP.29/2014/18 |
|
Proposal to update UN R27 in line with technological progress and performance-based methodologies. The main changes are: a) Revised provisions to combine color boundaries for the night time color, b) Replacement of Illuminant C with Illuminant D65 in the measurement of fluorescent materials, c) Alternative methods introduced for instrumental measurement of the fluorescent color, d) New Annex 10 to replace reference to ISO 105, e) Clarification of the wind test (Annex 5), f) Standardization of the test surface representing the road, g) Simplification of the test device for clearance to the ground in Annex 3, h) Amendment of COP requirements, and i) 36-month transitional period in a new paragraph 14. |
| Meeting Sessions: 162nd WP.29 session (11-14 Mar 2014) |
| Document date: 14 Dec 13 |
| Document status: Adopted text published |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| Warning triangle diagrams in support of document GRE-70-25 |
| Reference Number: GRE-70-26 |
|
Diagrams further illustrating the corrections proposed in document GRE-70-25. |
| Submitted by: GTB |
| Meeting Sessions: 70th GRE session (21-23 Oct 2013) |
| Document date: 16 Oct 13 |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for Correction to document GRE/2013/49 |
| Reference Number: GRE-70-25 |
|
Editorial corrections to the GTB and CLEPA proposal to update UN R27 in line with technological progress and performance-based methodologies. |
| Submitted by: GTB |
| Meeting Sessions: 70th GRE session (21-23 Oct 2013) |
| Document date: 16 Oct 13 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for correction to document GRE/2013/49 |
| Reference Number: GRE-70-03 |
|
Corrections to the combined GTB and CLEPA proposal to update UN R27 in line with technological progress and performance-based methodologies. |
| Submitted by: GTB |
| Meeting Sessions: 70th GRE session (21-23 Oct 2013) |
| Document date: 10 Sep 13 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for Supplement 3 to the 03 series of amendments to Regulation No. 27 |
| Reference Number: GRE/2013/58 |
|
Proposal to clarify the Conformity of Production requirements. |
| Submitted by: Germany |
| Meeting Sessions: 70th GRE session (21-23 Oct 2013) |
| Document date: 07 Aug 13 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for the 04 series of amendments to Regulation No. 27 |
| Reference Number: GRE/2013/49 |
|
Combined GTB and CLEPA proposal, superseding documents GRE/2011/46 and GRE/2012/25, to update UN R27 in line with technological progress and performance-based methodologies. The main changes are: a) Revised provisions to combine color boundaries for the night time color, |
| Submitted by: GTB and CLEPA |
| Meeting Sessions: 70th GRE session (21-23 Oct 2013) |
| Document date: 07 Aug 13 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for Supplement 3 to the 03 series of amendments to Regulation No. 27 |
| Reference Number: GRE/2012/25 |
|
Proposal to update UN R27 in accordance with technological progress by establishing provisions for the use of fluorescent retro-reflective strip, enabling the consolidation of currently separate fluorescent (daytime) and retro-reflective (nighttime) striping. |
| Submitted by: CLEPA |
| Meeting Sessions: 68th GRE session (16-18 Oct 2012) |
| Document date: 03 Aug 12 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for Amendment to Regulation No. 27 |
| Reference Number: GRE-67-12 |
|
Proposal to update UN R27 in accordance with technological progress by establishing provisions for the use of fluorescent retro-reflective strip, enabling the consolidation of currently separate fluorescent (daytime) and retro-reflective (nighttime) striping. |
| Submitted by: CLEPA |
| Meeting Sessions: 67th GRE session (26-29 Mar 2012) |
| Document date: 06 Mar 12 |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for 04 series of amendments to Regulation No. 27 |
| Reference Number: GRE/2011/46 |
| Submitted by: GTB |
| Meeting Sessions: 66th GRE session (4-6 Oct 2011) |
| Document date: 22 Jul 11 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| View full document file for more information |
| Click here to view the full document file |
| Proposal for Corrigendum 1 to Revision 1 to Regulation No. 27 |
| Reference Number: WP.29/2010/15 |
| Meeting Sessions: 150th WP.29 session (9-12 Mar 2010) |
| Document date: 18 Dec 09 |
| Relevant to: UN Regulation No. 27 | Advance Warning Triangles |
| Click here to view the full document file |