Waymo Robotaxi Allegedly Collides With Serve Robotics Delivery Bot in Los Angeles

A Waymo robotaxi reportedly collided with a Serve Robotics delivery robot at a West Hollywood intersection on December 27th, 2024. The delivery robot reportedly moved into the vehicle turning lane as the robotaxi approached, leading to a low-speed collision.

Risk classification

• Primary risk domain: 7 AI system safety, failures, & limitations
• Primary risk subdomain: 7.3 Lack of capability or robustness

The incident represents a collision between two autonomous systems due to a failure to safely coordinate and navigate around each other in a shared physical environment.

Additional risk subdomains

• 7.6 Multi-agent risks: The collision highlights the lack of coordination and communication protocols between different autonomous systems operating in the same physical space.

Causal factors

• Entity: AI
• Intent: Unintentional
• Timing: Post-deployment

The collision was an unexpected and unintentional outcome resulting from the real-world navigation decisions of deployed autonomous driving and delivery systems.

EU AI Act risk tier

• Risk tier: 2 High Risk

High Risk: The system is an autonomous vehicle operating in public traffic infrastructure. According to the EU AI Act definitions, AI in critical infrastructure such as traffic management or transport poses high risks to safety.

AI system and alleged parties

• AI system: Waymo Driver (Waymo)
• AI purpose: Autonomous Driving; Navigation Assistant
• Behaviour type: Autonomous
• Alleged developer: Waymo, Serve Robotics
• Alleged deployer: Waymo, Serve Robotics
• Alleged harmed parties: Serve Robotics

Harm severity

Severity ratings are based on this scale.

Highest direct severity in any category: Negligible. Severity is scored from Negligible to Catastrophic in each harm category, for harm the reports describe as caused directly or indirectly by the AI system.

• Physical: direct Negligible, indirect Negligible
• Infrastructure: direct Negligible, indirect Negligible
• Property: direct Negligible, indirect Negligible
• Financial: direct Negligible, indirect Negligible
• Environmental: direct Negligible, indirect Negligible
• Malicious content: direct Negligible, indirect Negligible
• Differential treatment: direct Negligible, indirect Negligible
• Civil rights: direct Negligible, indirect Negligible
• Democracy: direct Negligible, indirect Negligible
• Privacy: direct Negligible, indirect Negligible
• Psychological: direct Negligible, indirect Negligible
• Epistemic: direct Negligible, indirect Negligible
• Child sexual exploitation and abuse: direct Negligible, indirect Negligible

People affected

• Occurrences reported: 1

Potential causes

Management

• Undefined Liability Frameworks: Companies had not established clear liability or coordination protocols.

Technology

• Inanimate Object Classification: Waymo classified the delivery robot as inanimate, reducing safety margins.
• Delayed Hard Braking: Waymo applied hard braking too late to prevent a 4 mph collision.
• Erratic Bot Movement: Serve bot paused at the curb then suddenly entered the vehicle turning lane.

Data Inputs

• Object Classification Label: Active moving delivery robot labeled as inanimate, impacting path prediction.

Human Factors

• Remote Supervisor Error: Serve bot was under remote supervisor control when entering the turning lane.

Process and Methods

• Intersection Crossing Playbook: Serve's playbook relied on remote supervision which failed to prevent crash.
• Lack of Inter-AV Communication: No protocol exists for different AV systems to communicate and coordinate.

Regulatory Environment

• Lack of AV Interaction Standards: No regulatory rules govern how different robot systems interact on roads.

Information quality

• Classification confidence: High
• Reason for confidence: The report provides a clear, firsthand account of the collision, including statements from both Waymo and Serve Robotics spokespeople confirming the details of the event, speeds, and lack of damage.
• Ambiguities identified: It is slightly unclear whether the Serve delivery robot actually ran a red light as suggested by a social media post, or if the remote supervisor made an error.
• Alternative interpretations: The incident could be interpreted as a human supervision failure on the part of the Serve robot operator rather than a pure AI failure.

A minor, low-speed collision between a Waymo robotaxi and a Serve Robotics delivery bot in West Hollywood highlights emerging coordination and liability challenges for multi-agent autonomous systems in shared spaces. The incident resulted in no injuries or damage and carries negligible national security implications.

• Overall national security impact: Negligible
• Scope: Single nation
• Primary target: No clear primary
• Alleged perpetrator: Unknown

Threat characteristics

• Imminence: Long-term. The collision represents a long-term strategic and regulatory challenge for autonomous system integration rather than an active, imminent national security crisis.
• Autonomy: Human-supervised. The Waymo vehicle operated autonomously while the Serve delivery robot was under remote human supervision, representing a mixed autonomous-supervised operational environment.
• Novelty: Evolved capability. This is the first reported collision specifically between a sidewalk delivery robot and a robotaxi, representing an evolved capability and interaction challenge for multi-agent systems.

Impact by dimension

• Physical security: Negligible. The incident was a minor, low-speed collision (4 mph) between two unmanned autonomous systems with no reported injuries or property damage, presenting negligible threat to physical security or critical infrastructure.
• Information security: Negligible. There is no indication of intelligence compromise, classified data exposure, or information warfare operations associated with this incident.
• Sovereignty: Negligible. The event does not impact government decision-making, state authority, electoral systems, or any core sovereign functions.
• Economic security: Negligible. While highlighting coordination challenges between autonomous systems, the incident caused zero financial or physical damage and does not threaten strategic economic or technological security.
• Societal stability: Negligible. The incident was a localized traffic event with no implications for civil liberties, societal stability, or human rights.