Revision history
Tier IV revision history
Every change to this record is dated, sourced, and independently verified where marked. Nothing is edited silently.
- Tracked since
- Jan 1, 2020
- Recorded events
- 8
Company
Activity
- IncidentJan 30, 2025
TIER IV autonomous bus rear-ended by public bus during Kumamoto test run
How this log works
This timeline aggregates every dated signal on the record (creation, deployments across the company's models, verified media, incidents, and Arc G field changes), newest first. A verified event is independently confirmed; an unverified one is recorded but not yet field-verified. The Arc G field-change log is forward-only: it accrues from Arc G adoption (2026-06-04) and records material changes as they flow through the updateEntityField chokepoint. Nothing is edited silently.
Machine-readable: /companies/tier-iv/history.md + REST /v1/companies/8c8a9f0b-110b-4d16-aad1-20798e85da1b/history.