AI Risk Wire

Cases › operational mistake › LR-2026-0820

Waymo robotaxi stalls at flooded San Diego street, trapping passenger

Preliminary Why: Only a republished copy: AOL · subject to change

Status: action reported, no fix

Severity minor
Reported 2 Nov 2026
Developer and model Waymo
Agent tool Waymo robotaxi (automated taxi)
Industry Ride-hailing / autonomous vehicle transportation

No source states: loss or records, could do, deployer.

Severity minor: The passenger was freed only when an officer manually drove the single robotaxi through the water; no third party loss is stated.

A Waymo robotaxi carrying a female passenger in San Diego stopped and reversed when it met a flooded street, then idled in the left lane, keeping her confined inside.

What happened

1 · What it was doingA Waymo robotaxi was carrying a female passenger through a flooded street in San Diego, driving autonomously with no human in the vehicle.
2 · What went wrongIt stopped and reversed at the flooded road, then idled in the left lane instead of clearing the roadway, blocking traffic and trapping the passenger.
3 · What it reached or didThe passenger stayed confined in the vehicle and two robotaxis blocked a lengthy segment of the road's left lane, forcing other drivers to go around.
4 · How it was caughtA hotel guest, Megan Schmidt, filmed the stuck Waymo and posted the video on October 29; the passenger herself was trapped inside.

What was done

An officer arrived and drove the vehicle manually through the water so the woman could continue.

Risks

Sorted by rule from the case's fields; not yet read from the sources.

Controls

Not yet read for controls. Controls that mitigate the primary risk:

Harness

Stop control

Application

Physical safety interlocks · Human approval for high-impact actions · Live behaviour monitoring · Adversarial testing before deployment

Similar incidents

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Evidence

No source states: how many records were exposed, the direct loss, a count of the other parties affected, any court case, the cause, what set it off.

Show every field, with its source and grade

The AI system

Developer
Waymo
C one secondary source states it
Software around the model
Waymo robotaxi (automated taxi)
C one secondary source states it
What it was allowed to do
Public roads; autonomous driving of passengers
D inferred by us from the described behaviour, reason shown
How much it acted alone
it acted alone, unwatched
D inferred by us from the described behaviour, reason shown
Stage of use
in live use
D inferred by us from the described behaviour, reason shown
Whose system
company that built the AI
D inferred by us from the described behaviour, reason shown
What it was for
Automated taxi service carrying passengers on public streets
C one secondary source states it

What happened

When it happened
2026-10-29
C one secondary source states it
Earliest source we hold
2026-11-02
A the date the source itself carries
Who caught it
the victim
D inferred by us from the described behaviour, reason shown
Who was responsible
the model provider
D inferred by us from the described behaviour, reason shown
What went wrong
operational mistake
D inferred by us from the described behaviour, reason shown
AI agent
an AI agent acted
D inferred by us from the described behaviour, reason shown

Impact

Severity
minor
D inferred by us from the described behaviour, reason shown
Kind of harm
operations
D inferred by us from the described behaviour, reason shown
Who was affected
A female passenger trapped inside a Waymo; other drivers forced to go around two stopped robotaxis
C one secondary source states it
Can it be undone
yes
D inferred by us from the described behaviour, reason shown
Why this severity
The passenger was freed only when an officer manually drove the single robotaxi through the water; no third party loss is stated.
D inferred by us from the described behaviour, reason shown

Context

Industry
Ride-hailing / autonomous vehicle transportation
C one secondary source states it
Country
United States
C one secondary source states it

LR-2026-0820 · version 2 · published 2026-11-03 after automatic checks; not yet checked field by field by a person · changes to this case · JSON