The text prepared by the informal group of experts on Regulation No. 55 to introduce amendments on the test procedure and installation of couplings belonging to classes K and L.

UN R55 Revision 2 draft as amended by GRRF/2014/28 (GRRF/2015/7, Supplement 4 to the 01 series), GRRF/2015/14, and R55-08-05.

Reformatted working draft text prepared by the informal group on UN Regulation No. 55 to introduce provisions for agricultural couplings and related applications.

KBA has noticed that class H50 couplings are not defined and so proposes to add this class and definitions to UN R55.

Expanded version of the earlier information in document R55-08-13.

Working draft proposal of the informal group on UN Regulation No. 55 to introduce amendments on:
(a) Requirements on remote indication;
(b) Availability of information on coupling fixing points for A50X couplings;
(c) On lateral strength of drawbars;
(d) Includes a new class definition for fully automatic drawbar couplings.

The pending Revision 3 to the 1958 Agreement opens the way for virtual or simulation testing for use in type approvals. This presentation considers the proposed amendment and its application to mechanical coupling approvals.

Draft proposal by the informal group on UN Regulation No. 55 to introduce amendments concerning coupling applications in multi-vehicle combinations.

Class S couplings refer to non-standard national/regional couplings that remain in use despite the broad trend towards harmonization around an agreed set of couplings specifically covered by other UN R55 classes. The aim of this proposal is to tighten and clarify the requirements for such couplings while discouraging the development of new non-standard Class S couplings (such that new designs would result in new classes if needed).

Working draft proposal from the informal group on Regulation No. 55 to update the provisions concerning Class K hook-type couplings when coupled with class L toroidal drawbar eyes.

Working draft amendment to UN R55 from the Informal Group on Amendments to UN R55.01.

Second revision of the draft text proposing to introduce amendments on the test procedure and installation of couplings belonging to classes K and L.

Proposal to introduce amendments on the test procedure and installation of couplings belonging to class K and L.

Proposal to introduce amendments on applications in multi-vehicle combinations.

Proposal to introduce amendments on:
a) Requirements on remote indication;
b) Availability of information on coupling fixing points for A50X couplings;
c) On lateral strength of drawbars;
d) Includes a new class definition for fully automatic drawbar couplings.

Reworked and restructured version of document TFAC-05-10.

Reworked version of document TFAC-05-10.

History of discussions concerning the D-value on modular vehicles and combinations with more than one trailer.

Review of the development of ISO 12357-3.

Presentation to explain the historical background behind the work of ISO/TC22/SC15/WG4 and the UN R55 informal working group.

Revised drawings prepared for the informal working group amending the regulation.

E-mail communication between the WP.29 secretariat and the UN R55 revision informal group proposing the drafting of a new consolidated version of the amended regulation incorporating all the informal group changes.

Working draft of the comprehensive update to UN R55 from the Informal Group on Amendments to UN R55.01.

Australian research paper suggesting that an air-suspended tandem converter dolly could pitch significantly under braking as compared to mechanically suspended dollies.

Australia Road Research Board (ARRB) Internal Report related to ISO/TC22/SC15/WG4 N 535 Annex 5.

List of pending proposals for the update to UN R55 from GRRF participants.

The text reproduced below was prepared by the experts of the informal group on UN Regulation No. 55 and introduces amendments on:
a) Requirements on remote indication;
b) Availability of information on coupling fixing points for A50X couplings;
c) On lateral strength of drawbars;
d) Includes a new class definition for fully automatic drawbar couplings.

Proposal under preparation for the GRRF by the R55 informal group. This proposal concerns a procedure to identify allowable combinations of performance values Dc and V for drawbar coupling equipment. This proposal would amend the Revision 2 proposal for UN R55.

Draft proposal under development within the R55 informal group.

Updated version of the draft consolidated revision of UN R55 following the 11th R55 informal group session.

Updated version of the text following the 11th R55 informal group session and highlighting the changes

UN R55 does not include provisions for minimum articulation angles of couplings. However, couplings may be damaged if a vehicle combination takes a narrow curve or other maneuver that exceeds the coupling design. In order to prevent coupling failures, this proposal suggests minimum articulation requirements based partly upon ISO 1726-1 and 11407 for drawbar and fifth wheel couplings.