Proposal for driver acknowledgement of correct use of DCAS.

Revised proposal concerning reinstatement of the system at initiation of the powertrain.

Proposal to permit the use of virtual testing as an alternative to physical testing.

Proposal to permit the use of virtual testing as an alternative to physical testing.

Proposal to permit the use of virtual testing as an alternative to physical testing.

Proposal to permit the type approval of a park lock device as an alternative to the friction parking brake(s).

Proposal to modify the in-service performance reporting requirements.

Proposal for revised provisions concerning initiation of the powertrain and run cycle.

Proposal to update the text in line with the establishment of UN R171 on DCAS.

Proposal to modify the track and real-world testing provisions in Annex 6.

Proposal to improve the wording of the “decelerating lead vehicle” test scenario for consistency with related provisions in the text.

Proposal to resolve an inconsistency in wording across the series with regard to the parking brake performance requirement.

Proposal to address loss of trailer friction braking efficiency due to increased use of robust endurance braking systems and electrification of trucks. The number of trucks with strong endurance braking systems and increasing electrification of vehicles with more efficient energy recuperating systems reduces the use of friction brakes. As a result, brake pads and linings in some commercial vehicles do not reach a temperature that is needed for the development of optimum brake performance. In particular in trailers, a loss of brake force develops due to brake pads and linings losing effectiveness – they “fall asleep” and need to be replaced although they are not worn out.

Proposal to align the original proposal to amend UN R171 with UN R79 and UN R157 with regard to the use of the term “activation” in relation to the powertrain.

Draft document under preparation by the task force on Vehicular Communications.

Proposal for amendments to the draft provisions on e-trailers.

Proposal to establish a UN Regulation based on EU Regulation 2021/646 to address collisions involving unintentional lane departures. An ELKS is defined as a system combining a lane departure warning system (LDWS) and a corrective directional control function (CDCF).

Proposal to explicitly note objectives behind provisions requiring manufacturers to perform in-service monitoring and reporting (ISMR) for their driver-control assistance systems approved under UN R171 and for UN R171 to be continually reviewed based on technological progress and data collected via ISMR.

Proposal to permit the type approval of a park lock device as an alternative to the friction parking brake(s).

Proposal to prohibit regular lane changes into unlimited speed lanes for heavy vehicles (M₃ and N₃.

Proposal to clarify the provisions concerning the conditions for automatic re-instatement of the system at the “initiation of each engine start / run cycle”.

Proposal to clarify the conditions for automatic re-instatement of the system at the “initiation of each engine start / run cycle”.

Proposal to introduce a mapping of requirements and references to ISO 24089:2023 (“Road vehicles – Software update engineering”) where such referencing may aid the understanding and/or implementation of UN Regulation No. 156 requirements.

Proposal to clarify the conditions for automatic re-instatement of the system at the “initiation of each engine start / run cycle”.

Proposal to clarify provisions concerning the conditions for automatic re-instatement of the system at the “initiation of each engine start / run cycle”.

Proposal to enable the type approval of a park lock device as an alternative to the friction parking braking to hold the vehicle.

Proposal to clarify provisions concerning the conditions for automatic re-instatement of the system at the “initiation of each engine start / run cycle”.

Proposal to clarify the conditions for automatic re-instatement of the system at the “initiation of each engine start / run cycle”.

Proposal for provisions to enable the use of approval of a park lock device as an alternative to the friction parking braking to hold the vehicle.

Proposal to ensure that endurance braking is assessed in the context of the Type II-A test based on the maximum mass of the vehicle or vehicle combination.

Proposal to introduce new provisions to enable regulating DCAS supporting system-initiated manoeuvres and/or allowing skipping “Hands-on” requests, ensuring maintaining string stability and providing additional editorial corrections and clarifications.