R55-13-22 | Participants list from the 13th UN R55 informal group session

R55-12-25 | Report of the 12th UN R55 informal group session

GRRF-81-06 | Proposal for amendments to Regulation No. 55 Proposal from the informal group on UN Regulation No. 55 to introduce provisions for coupling applications in multi-vehicle combinations ( e.g. rigid truck + dolly + semi-trailer) presently not addressed by the regulation.

GRRF-81-07 | Proposal for amendments to the informal document GRRF-81-06 Further refinements from the informal group on UN Regulation No. 55 to introduce provisions for modular vehicle combinations (e.g., rigid truck + semi-trailer + dolly). This proposal concerns a procedure to identify allowable combinations of performance values Dc and V for drawbar coupling equipment.

GRRF-80-29 | Proposal for a Supplement to the 01 series of amendments to Regulation No. 55 Proposal to ensure that coupling balls do not block rear lighting and/or registration plates. In line with the EU General Safety Rule, Annex IV specification for application of UN R55, couplings that might block lighting or plates must be removable, repositionable, and unlockable in order to make it easier for users to remove them or reposition them when not in use (e.g., towing a trailer.) Coupling balls that are so designed as to be unable to block lighting or plates may still incorporate locks and/or require tools to remove or reposition.

R55-13-12 | Updated list of discussion items for the 13th R55 informal group session

R55-13-32 | Waiting list of GRRF request concerning the update of UN R55

R55-07-20 | UN R55- Item 7: Attachment point Requirement of a brake away cable also for drawbar-couplings

R55-13-08 | UN R55: Demonstration of speed reduction proposal

R55-12-03 | Working draft proposal to amend UN R55 with regard to vehicle combination applications Draft proposal under development within the R55 informal group.

R55-12-10 | UN R55: Proposal for restructuring provisions on vehicle combination applications

R55-12-20/Rev.1 | UN R55: Proposal for restructuring provisions on vehicle combination applications Revised proposal developed by the UN R55 informal group to introduce provisions for mechanical couplings used in modular vehicle combinations (e.g., rigid truck + dolly + semi-trailer) presently not addressed within the regulation.

R55-12-28 | Comments on the old Dutch couplings application

R55-13-07/Rev.1 | Working draft amendment to UN R55 with regard to speed reduction, speed dependence, and heavy transports Working draft proposal of the UN R55 informal group for a uniform procedure to rate couplings for extreme heavy transport configurations based upon a speed-reduction method. The intent is to address conditions where there are no coupling products with appropriate certified performance values.

R55-13-03/Rev.2 | UN R55: Updated proposal for restructuring provisions on vehicle combination applications

R55-12-05 | UN R55: Working draft proposal for allowable performance values 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.

R55-12-19/Rev.1 | UN R55: Revised working draft proposal for allowable performance values Proposal as developed by the UN R55 informal group during its 12th session. 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.

R55-13-09 | UN R55: Minimum articulation angles of couplings mounted to the vehicles Proposal to introduce provisions for minimum articulation of couplings in order to prevent damage from maneuvers that exceed coupling capacities.

R55-13-10 | UN R55: Overview of angles of rotation

R55-13-30 | UN R55: Minimum articulation angles of couplings mounted to the vehicles

R55-13-05 | UN R55: Theoretical design assessment Working draft proposal of the R55 informal group to introduce amendments concerning: (a) Identification of worst cases for design assessment, and (b) Procedures for COP.

R55-13-14 | Proposal to amend UN R55 with regard to drawbar couplings Proposal for a higher vertical load for drawbar couplings with a jaw that pivots about the horizontal transverse axis.

R55-13-06/Rev.1 | UN R55: TAAM input on masses to be used in requirement calculations Information on TAAM discussions concerning cases where the sum of the mass of the towing vehicle (M) [T] and the mass of the towed vehicle <notextile>(TM) [R or C]</notextile> is higher than the maximum combination mass (MC) set for the towing vehicle.

R55-12-11 | Discussion paper with regard the dynamic tests of class-B couplings for COP

GRSG/2016/4 | Proposal for amendment to Regulation No. 55 At the May 2015 Type Approval Authorities Meeting (TAAM), Poland raised concerns (attached with this submission) over small M₁ vehicles being equipped with aftermarket coupling devices where the vehicle in question is not designed for towing a trailer. In effect, these vehicles are not permitted to tow trailers, but are nonetheless enabled to be equipped for such a purpose by the aftermarket devices. Therefore, Poland proposes to amend UN R55 to ensure that coupling devices are only approved for use on vehicles approved for towing trailers.