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A Spokane Transit Authority double-decker bus crashed into a low-clearance railroad viaduct after its onboard navigation/CAD mapping system routed it onto an incorrect street. The collision sheared the top of the bus, resulting in seven hospitalizations. Following the incident, the transit agency suspended the use of the CAD mapping system for routing and pulled the double-decker fleet from service pending an investigation.
In Spokane, Washington, a Spokane Transit Authority double-decker bus was reportedly routed by its onboard navigation/CAD mapping system onto Cedar Street and hit a low-clearance railroad viaduct, shearing the upper deck. Of 10 people aboard, seven were reportedly hospitalized with non-life-threatening injuries. STA reportedly later warned operators not to use CAD maps for routing and pulled double-deckers from service pending an investigation; the driver was cited for negligent driving.
Domain classification, causal taxonomy, severity scores, and national security assessments were LLM-classified and may contain errors.
AI systems that fail to perform reliably or effectively under varying conditions, exposing them to errors and failures that can have significant consequences, especially in critical applications or areas that require moral reasoning.
Also classified as
The driver relied on the CAD mapping software for routing instructions despite physical low-clearance warning signs on the road.
The onboard navigation software failed to perform reliably by routing a double-decker bus onto a street with a low-clearance viaduct that was physically impassable for the vehicle.
AI system
Due to a decision or action made by an AI system
Unintentional
Due to an unexpected outcome from pursuing a goal
Post-deployment
Occurring after the AI model has been trained and deployed
The incident was caused by an incorrect routing decision made by the onboard CAD mapping and navigation software after it was deployed.
Added categories peak at 2: Minor (Psychological Harm, Inferred)
A localized public transit accident occurred when an onboard CAD mapping system incorrectly routed a double-decker bus under a low-clearance viaduct, causing seven injuries and property damage. The incident represents a local safety failure with negligible national security implications, as the system was human-controlled and the threat is an established routing issue.
The CAD mapping software acts as an assistant by providing routing suggestions and maps to the human bus driver, who retains ultimate control and responsibility for driving the vehicle.
High Risk: The system is used as a safety component in public transit routing, which falls under critical infrastructure and traffic management.
The primary function of the CAD mapping system was to provide navigation and routing instructions to the transit drivers.
The report provides clear, detailed factual accounts of the crash, the injuries, the vehicle dimensions, and the role of the CAD mapping software. The transit agency's immediate action to suspend the software confirms its central role in the incident.
The incident could be viewed purely as driver negligence since they passed a warning sign, but the software's active instruction to detour makes it a clear joint human-AI failure.
Technology
Flawed Onboard Navigation
Software routed a tall double-decker bus onto a low-clearance street.
Lack of Height Integration
CAD routing system failed to account for the 13.5-foot height of the bus.
Data Inputs
Incorrect CAD Map Data
CAD maps provided detour routing that was unsafe for double-decker buses.
Human Factors
Overreliance on GPS
Driver followed software-directed detour instead of observing visual signs.
Driver Negligence
Operator drove past low-clearance warning signs before hitting the viaduct.
Process and Methods
Delayed Safety Alerts
Agency took over three hours to warn other drivers about the CAD map issue.
Service Change Alignment
Detour routing coincided with a thrice-yearly scheduled service change.
Management
Overconfidence in Safety
Mocked clearance risks in ads instead of implementing robust routing checks.
Delayed Fleet Grounding
Management waited four hours after the crash to pull buses from service.
Regulatory Environment
Inadequate Bridge Warnings
Existing physical signs did not deter frequent collisions at this viaduct.
AI system involved
Identified by automated extraction; can differ from the alleged developers above.
