{
 "public_id": "AIR-2026-0222",
 "incident_id": "2026-08-zoox-las-vegas-decatur-russell-rear-end",
 "date_disclosed": "2026-09-07",
 "date_occurred": "2026-08-25",
 "title": "An unoccupied Zoox robotaxi stopped abruptly in the Decatur/Russell intersection in Las Vegas to yield to an emergency vehicle and was rear-ended by a Ford 4Runner",
 "class": "safety_failure",
 "attack_surface": "autonomous_ops",
 "initial_vector": "none_autonomous_action",
 "agent_capability_abused": [
  "autonomous_driving",
  "emergency_vehicle_yielding",
  "braking_control"
 ],
 "target_product": "Zoox robotaxi",
 "target_vendor": "Zoox (Amazon)",
 "autonomy_level": "fully_autonomous",
 "impact_realized": true,
 "impact_type": [
  "property_damage",
  "traffic_collision"
 ],
 "blast_radius": "one robotaxi and one human-driven Ford 4Runner in a Las Vegas intersection; no riders aboard; no injuries reported",
 "cve": [],
 "taxonomy": {
  "owasp_asi": [],
  "mitre_atlas": [],
  "labels": [
   "no_adversary",
   "physical_world",
   "rear_end_collision",
   "abrupt_stop",
   "emergency_vehicle_interaction",
   "human_driver_at_fault_claimed",
   "mixed_traffic_expectation_mismatch",
   "regulatory_exemption_context"
  ]
 },
 "defense_present": "emergency-vehicle yielding behaviour (mandated by NHTSA's July 2026 first-responder directive)",
 "defense_bypassed": false,
 "fix_shipped": "none; Zoox attributes fault to the following driver; collision under investigation",
 "primary_sources": [
  "https://hoodline.com/2026/09/driverless-zoox-rear-ended-at-las-vegas-intersection-days-after-airport-expansion/",
  "https://vehicle-safety.org/stories/878-zoox-exemption-month-one-breach"
 ],
 "verified_quote": "A driverless Zoox vehicle was struck from behind by a Ford 4Runner at the intersection of Decatur Boulevard and Russell Road around 11 a.m. on August 25, with no riders aboard the robotaxi at the time of the crash, according to Zoox.",
 "confidence": "medium",
 "notes": "Boundary call, included deliberately: on Zoox's account the robot did what the regulator ordered (stopped for an oncoming emergency vehicle) and the human driver behind it was at fault, so defense_bypassed is false. It is retained because the recurring failure shape is the abrupt stop in mixed traffic that human followers do not anticipate - Zoox's March 2025 recall of 258 vehicles was for unexpected hard braking after two rear-end motorcycle collisions, and a witness (Kourtney Wagner, via KLAS 8 News Now) said drivers will need to adjust to robotaxi driving habits. The collision came to rest in the middle of the intersection. Property damage is the realized impact; no injuries reported. Context: the crash occurred 15 days after Zoox began paid service (10 Aug) under NHTSA's 30 Jul 2026 exemption (up to 2,500 steering-wheel-free vehicles), and days before airport service began (3 Sep). Hoodline cites Facebook-shared federal filings of at least 52 reportable Zoox crashes in Nevada - unverified here. Las Vegas Review-Journal coverage not cited. Secondary press only, hence medium.",
 "risk_category": "reliability",
 "risk_secondary": [
  "legal_ip"
 ],
 "risk_subcategory": "Destructive or irreversible action",
 "risk_sub_secondary": [],
 "ai_entity": "non_generative_autonomy",
 "agency": "agent_acted",
 "agency_debatable": true,
 "agency_reason": "the robotaxi's abrupt stop set up the collision; the striking driver also failed to stop",
 "vector_family": "none_autonomous",
 "vector_detail": "none_autonomous_action",
 "guardrail_kind": [
  "physical_safety_system"
 ],
 "guardrail_outcome": "silent",
 "xrefs": {
  "aiid": [],
  "atlas": [],
  "cve": [],
  "ghsa": []
 },
 "primary_asi": "none",
 "agent_framework": "robotaxi_stack",
 "model_provider": "none",
 "model_name": "",
 "detection_mechanism": "unknown",
 "tool_access": "unknown",
 "financial_loss_band": "unknown",
 "eai_category": "unsafe_actuation",
 "eai_domain": "agent_behaviour",
 "eai_secondary": [],
 "eai_reason": "subcategory: Destructive or irreversible action",
 "asi_curated": [],
 "asi_scope": "out_of_scope",
 "asi_provenance": "out_of_scope",
 "asi_reason": "out of scope: non_generative_autonomy: no ASI mechanism describes the failure",
 "submitted_by": "EAI Internal"
}