Replies to comments from ETRTO and OICA on the LEON-T study.

ETRTO proposed three ways to estimate service life (TA-36-04): tread depth measurements, initial tread depth and abrasion index, and tread mass. JRC presented a service life index (TA-32-04) based on tread depth measurements and conducted a preliminary assessment of the second concept. Service life is estimated by linear extrapolation to 1.6 mm from tread measurements at test start and end. The Service life index is calculated as the ratio of candidate to reference tyre service life. Next steps include confirming the equation for service life via tyre characteristics and clarifying which tyre characteristics are needed.

UN GTR No. 25 addresses minimum performance requirements, lifetime requirements, and metrics for heavy-duty vehicles. Lifetime requirements are 12 years and 700,000 km or 15 years and 875,000 km for Category 1-2 vehicles exceeding 7.5 tonnes and Category 2 vehicles exceeding 16 tonnes. An optional annex proposes different metrics including years, kilometres whichever comes first, and energy throughput in monitoring. Capacity retention requirements for N₃ vehicles exceeding 16 tonnes are specified at 12 years and 700,000 km and at 15 years and 875,000 km.

The presentation reports results from performance-based models for electric passenger vehicles and electric vans, analyzing capacity retention and capacity fade at 5, 8, and 10 years and at 100,000 km, 160,000 km, and 200,000 km driving distances. Results show capacity retention exceeding 60 per cent at 10 years and 200,000 km for vans with Li-Ion NCM-LMO (2015) battery technology, and exceeding 65 per cent for battery electric vehicles under the same conditions.

Proposal to amend guidance on continuous improvement processes in para. 7.1.8.2. by inserting text stating that post-deployment safety analyses are systematically performed for all occurrences; however, their conclusions do not necessarily result in the identification of a corrective action from the manufacturer, modifying text to state that not all identified corrective or preventive actions need to be implemented in order to close an occurrence, and replacing text to state decisions on what to address and how are based on an overall assessment of the consequences and the impact of implementing a change.