# NHTSA opens a probe into Waymo's 5th-gen ADS after reports of unexpected driving behavior revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Incident: [NHTSA opens a probe into Waymo's 5th-gen ADS after reports of unexpected driving behavior](/incidents/waymo-nhtsa-odi-investigation-2024.md)

## Recorded posture

- First recorded event: 2026-06-04
- Last material change: 2026-06-04
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2026-06-04**: created (source: baseline:arc-g)

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date.

_Canonical URL: /incidents/waymo-nhtsa-odi-investigation-2024/history. REST: /v1/incidents/d08240b1-75f9-4137-b2df-8da2b405c623/history. HTML: [/incidents/waymo-nhtsa-odi-investigation-2024/history](/incidents/waymo-nhtsa-odi-investigation-2024/history)._