UN R144 — Supplement 2 to the 01 series of amendments

Supplement 2 is introduced to take into account vehicles of category X and other vehicles equipped with an Automated Driving System (ADS) (para. 0.1.). Paragraph 0.1.1. says that the UN Regulation was originally drafted for vehicles with a driver and manual driving controls. In the absence of occupants in the vehicle, there is no need to fulfil any of its requirements. Therefore, vehicles of categories Y are exempted from the scope of this Regulation. For vehicles equipped with an ADS other than vehicles of category X, no special provisions or exemptions apply in the manual driving mode (para. 0.1.2.). In a mode where an ADS feature is active, the relevant ADS requirements have to be fulfilled.

Paragraph 1.2. lists what this Regulation does not apply to. New item (f) adds manual triggering of the AECS while both an ADSF-2 is active, and the vehicle is not carrying passengers. Paragraph 1.3. lists vehicles that are excluded from the scope of this Regulation. New item (d) adds vehicles of category Y. In item (e) of paragraph 1.2. and items (b) and (c) of paragraph 1.3., only the punctuation and the place of the word “and” change.

New paragraph 2.34. defines “ADS feature” as an application of an ADS designed specifically for use within an Operational Design Domain (ODD). New paragraph 2.34.1. defines “ADS feature of type 1 (ADSF-1)” as an ADS feature which includes an ADS fallback response requiring a fallback user. New paragraph 2.34.2. defines “ADS feature of type 2 (ADSF-2)” as an ADS feature which does not include an ADS fallback response requiring a fallback user.

Paragraph 26.4.1. now adds: “For vehicles equipped with an ADSF-2, the AECS control shall be installed so as to be readily accessible by the occupants (if applicable).” Paragraph 35.6.1. adds the same sentence with “(as applicable)”. New paragraph 0.1.3. says that paragraphs 26.4.1. and 35.6.1. have been updated to make sure the control is accessible by the occupants. It does not mean that all occupants, for example small children, must be able to access the controls.

Paragraph 26.6. is on hands-free audio performance. The AECS must provide sufficient voice intelligibility for the vehicle driver, or in case of vehicles equipped with an ADSF-2, for the passengers (if applicable). Paragraph 35.8. says the same with “for the occupants” instead of “for the passengers”. Before, both paragraphs said “for the vehicle driver”.

Table 3 of paragraph 26.5.3.1. is the template of information for the self-test function. Its note on an internal failure of the Crash Control Unit (CCU) changes. When the CCU is not part of the AECD, this requirement is deemed to be fulfilled if two conditions are both met. The second condition now says that the warning strategy on AECD is explained to the driver or ADS user(s) (as applicable). Before, it said “explained to the driver”.

The footnote “As defined in Section 2 of the Consolidated Resolution on the Construction of Vehicles (R.E.3.)” now refers to document ECE/TRANS/WP.29/78/Rev.8 instead of Rev.6. It also gives a new web address.