Partial Automation Investigations

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Be​​low are our completed and ongoing investigations that involved a vehicle being operated in a partial automation mode at the time of the crash. The completed investigations describe the issues we examined, link to the investigation page ​where we detail the crash and state the probable cause, and link to the other relevant documents and the complete public accident docket. The ongoing investigations provide a succinct description of the preliminary factual information.​ 

​​​For links ​to Related Automated Driving Systems Investigations​

​Return to Advanced Driver Assistance Systems and Automated Driving Systems


Philadelphia, Pennsylvania ​ 

​The March 3, 2024, fatal crash in Philadelphia, Pennsylvania, involved a vehicle operating in a partial automation mode that crashed into the rear of a stopped vehicle. ​In addition to examining alcohol-impaired driving, we examined the limitations and oversight deficiencies of partial driving automation systems, including:

  • ​Lack of federal requirements for data recording and inadequate manufacturer awareness of crash events
  • Driver monitoring systems limitations
  • Deficiencies in Ford’s implementation of its partial automation system, and overall lack of guidelines for implementation of partial automation systems.​


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San Antonio, Texas​​

The February 24, 2024, crash in San Antonio, Texas, ​involved a vehicle operating in a partial automation mode that crashed into the back of a stopped sport utility (SUV) vehicle. As a result of the crash, the driver of the stopped SUV was fatally injured. We examined l​imitations and insufficient federal oversight of partial driving automation systems, including:
  • ​L​ack of federal requirements for data recording and inadequate manufacturer awareness of crash events
  • Driver monitoring systems limitations 
  • Deficiencies in Ford’s implementation of its partial automation system, and overall lack of guidelines for implementation of partial automation        systems.


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Delray Beach, Florida
​The March 1, 2019, fatal crash in Delray Beach, Florida, involved a vehicle operating in partial automation mode that struck the trailer of a combination vehicle crossing a state highway, in a sequence that closely resembles the Williston crash. We examined these safety issues:
  • limitations of the partial automation system
  • method of monitoring driver engagement
  • automation overreliance


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​Mountain View California​​

The March 23, 2018, crash in Mountain View, California was a fatal crash involving a vehicle operating in partial automation mode that veered into a gore area and struck a previously damaged crash attenuator at highway speed; a postcrash fire ensued. We examined these safety issues:
  • ​limitations of the partial automation system and the method of monitoring driver engagement
  • federal requirements for collision avoidance systems
  • driver distraction and automation overreliance​

 
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​​​​​​​​​​​Culver City, California
The January 22, 2018, crash in Culver City, California, involved a vehicle operating in partial automation mode that crashed into the back of a stopped fire truck partially blocking the travel lane. We examined these safety issues:
  • limitations of the partial automation system
  • method of monitoring driver engagement
  • driver distraction and automation overreliance




Williston​​, ​Florida​​​

The May 7, 2016, crash in Willi​ston, Florida​, was the first fatal crash in the United States involving a vehicle operating in a partial automation mode at the time of the crash. We examined these safety issues:

  • ​​​partial automation system capabilities and limitations​
  • driver automation overreliance
  • data recording requirements


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Updated 20 April​ 2026   



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