Non-Governmental Organization
International Automotive Lighting and Light-signalling Expert Group
Submissions to WP.29 bodies: Five hundred and nine documents (latest document: 14 June 2021)

Since 1952 the GTB has been recognised as the global group of vehicle manufacturers, system suppliers, light source manufacturers, testing laboratories and academia working to assure regulation and safety of automotive lighting systems and their installation.

GTB membership includes 17 delegations from countries, including Europe, USA and Japan. Representation in national delegations comes from industry, approval testing laboratories, regulatory agencies and academia.

The GTB’s principal activity today is the preparation of proposals for new and amended UNECE Regulations, taking into account technical development, actual testing experience and the safety and economic implications with a view to practical application.

In 2012, the GTB changed its name from the Working Group Brussels 1952 (aka Groupe de Travail Bruxelles 1952, hence the acronym GTB) to the International Automotive Lighting and Light-signalling Expert Group.

You can find more information about GTB at their website.

2021 June 14
Editorial errors with regard to lighting scientific notations | SLR-48-08
2021-06-14 2021-06-14 15:14:03 UTC
2021 June 14
Question on additional visibility test for red light towards front and/or white light towards rear of vehicle | SLR-48-09
2021-06-14 2021-06-14 15:16:35 UTC
2021 June 11
UN R149: Proposal for the 01 series of amendments | SLR-48-04
2021-06-11 2021-06-11 10:46:24 UTC
2021 May 14
UN R48: Proposal for provisions on additional contributors to the driving beam | SLR-46-25/Rev.1
2021-05-14 2021-03-27 10:17:01 UTC
2021 May 5
UN R148: Detachable outer lens marking provision | SLR-47-03
2021-05-05 2021-05-05 17:25:55 UTC
2021 May 5
UN R148: Comments on failure conditions | SLR-47-04
2021-05-05 2021-05-05 17:34:40 UTC
2021 April 26
UN R48: Revised proposal to GRE/2020/4 Rev 1 | GRE-84-24
2021-04-26 2021-04-26 09:06:49 UTC
2021 April 26
Article on road projections as a new and intuitively understandable human-machine interface | GRE-84-25
2021-04-26 2021-04-26 09:09:29 UTC
2021 April 26
Article on Investigation on Headlights with High-resolution Projection Modules | GRE-84-26
2021-04-26 2021-04-26 09:11:44 UTC
2021 April 26
Article on real driving benefits and research findings with digital light functions | GRE-84-27
2021-04-26 2021-04-26 09:33:27 UTC
2021 March 22
UN R148: 01 series of amendments rear marking plate lamps | SLR-46-10
2021-03-22 2021-03-19 17:21:40 UTC
2021 February 21
Proposal for R48, R148, R149: Visibility of red light and white light | SLR-44-07/Rev.1
2021-02-21 2021-01-07 21:34:58 UTC
2021 February 21
UN R149: New photometric tables | SLR-45-01/Rev.1
2021-02-21 2021-01-24 18:14:36 UTC
2021 February 20
Clarification of markings under the 01 series of UN R148 and UNR150 | SLR-45-06/Rev.1
2021-02-20 2021-02-13 11:03:17 UTC
2021 February 13
UN R148: 01 series change index table discussion | SLR-45-07
2021-02-13 2021-02-13 11:05:31 UTC
2021 February 12
Proposal for Supplements to UN R149 and to the 06 and 07 series of amendments to UN R48 | GRE/2020/4/Rev.1
2021-02-12 2021-02-12 12:41:04 UTC
2021 February 12
UN R48: Proposal for Supplement [16] to the 06 series and Supplement [02] to the 07 series of amendments | GRE/2021/5
2021-02-12 2021-02-12 14:12:03 UTC
2021 February 12
UN R149: Proposal for Supplement [4] | GRE/2021/6
2021-02-12 2021-02-12 14:55:45 UTC
2021 January 24
UN R149: Requirements tables | SLR-45-02
2021-01-24 2021-01-24 18:15:54 UTC
2020 December 13
UN R148: Application of scientific notations | SLR-43-05/Rev.1
2020-12-13 2020-12-03 19:28:00 UTC
2020 December 13
UN R149: Application of scientific notations | SLR-43-06/Rev.1
2020-12-13 2020-12-03 19:29:04 UTC
2020 December 13
UN R150: Application of scientific notations | SLR-43-07/Rev.1
2020-12-13 2020-12-03 19:29:59 UTC
2020 December 7
UN R148: Proposals for the 01 series of amendments | SLR-43-09
2020-12-07 2020-12-07 12:53:28 UTC
2020 December 7
Parking signal performed by position lamps | SLR-43-08
2020-12-07 2020-12-07 12:57:27 UTC
2020 November 9
UN R149: Proposal for simplification of photometric stability testing | SLR-42-05/Rev.1
2020-11-09 2020-11-01 12:21:38 UTC