Notes include the DSSAD subgroup 12th session held in conjunction with the EDR/DSSAD informal group session.

Proposal to introduce provisions into the new UN Regulation on commercial vehicle driver direct vision (tentatively UN R167 pursuant to its adoption at the November 2022 WP.29 session). The proposal is based on a previous proposal to establish a new UN Regulation on Urban Emergency Braking Systems (UEBS).

Proposal with tracked changes revising the earlier proposal for a new UN Regulation on Urban Emergency Braking Systems.

Text revised for clarity and to avoid misinterpretation especially in the certification process.

Proposal from the EDR/DSSAD informal group to revise and clarify the acceleration data accuracy for the lateral and longitudinal acceleration data elements and introduce procedures to verify compliance of the acceleration data with the acceleration sensor accuracy specifications. The proposal is based on the following considerations:

1. There are multiple ways in which the acceleration data accuracy tolerance can be applied. This can potentially lead to different interpretations when applied by type-approval authorities. For clarity, the accuracy tolerance is specified as “+/- 10 per cent of the full range of the accelerometer used in the ECU containing the EDR function”.
2. The proposal enables a component test (including a time-shifting algorithm to address differences in sampling rates between an EDR and bench test) to address difficulties in verifying acceleration sensor accuracy under vehicle crash tests.
3. The proposal adds a footnote to clarify that the manufacturer has discretion (option) over the format for lateral acceleration data in rollover event because such data is not recorded using the lateral airbag deployment sensors.
4. The proposal adds Annex 6 on the verification procedure with an illustration of the tolerance corridor for lateral and longitudinal acceleration.

Proposal from the EDR/DSSAD informal group to revise and clarify the acceleration data accuracy for the lateral and longitudinal acceleration data elements and introduce procedures to verify compliance of the acceleration data with the acceleration sensor accuracy specifications. The proposal is based on the following considerations:

1. There are multiple ways in which the acceleration data accuracy tolerance can be applied. This can potentially lead to different interpretations when applied by type-approval authorities. For clarity, the accuracy tolerance is specified as “+/- 10 per cent of the full range of the accelerometer used in the ECU containing the EDR function”.
2. The proposal enables a component test (including a time-shifting algorithm to address differences in sampling rates between an EDR and bench test) to address difficulties in verifying acceleration sensor accuracy under vehicle crash tests.
3. The proposal adds a footnote to clarify that the manufacturer has discretion (option) over the format for lateral acceleration data in rollover event because such data is not recorded using the lateral airbag deployment sensors.
4. The proposal adds Annex 6 on the verification procedure with an illustration of the tolerance corridor for lateral and longitudinal acceleration.

Proposal from the VRU-Proxi informal group to introduce an alternative method for assessment of the frontal visible volume to address future cab designs with narrower distances between A pillars. The current measurement method is dependent on the position of the A pillar. The alternative method is independent of the cab design and would be available for use at the manufacturer’s discretion.

Proposal to

1. Establish terms and definitions to enable differentiation of “centre-steer vehicles” and “side-steer vehicles” (paragraphs 12.7. to 12.9.), and
2. to ensure that the indirect vision provides the driver with adequate view in both vehicle designs.

Proposal to align UN R122 to technological progress concerning the use of radiation warmers in electric vehicles. The radiation warmer is expected to increase energy efficiency of EV and is also able to prevent the sharp reduction of All Electric Range (AER).

Proposal to align UN R43 with provisions in GTR 6 concerning the exemption of possible opaque obscuration areas from Zone I of the test area on the windscreen of M₂, M₃ and N categories of vehicles.

Proposal to allow additional checks on passive safety at the national level when conducting tests of a complete vehicle (such as checking for damage to seat mounts, objects presenting injury risks in the residual space, and operability of hatches).