When a human driver causes an accident, the liability framework is well established: negligence, traffic law, insurance. When a self-driving car causes an accident, nearly every element of that framework comes into question. Who is at fault — the vehicle manufacturer, the software developer, the owner who activated autonomous mode, or the mapping company that provided outdated road data?
The Liability Gap
Traditional automotive liability rests on two pillars: driver negligence and product defect. Autonomous vehicles collapse the distinction between driver error and product failure. If the car's algorithm makes a decision that results in a collision, it is simultaneously a driving decision and a product function. The article examines how existing doctrine in both negligence and strict product liability adapts — or fails to adapt — to this hybrid scenario.
Software as a Product
A central question is whether autonomous driving software constitutes a "product" subject to strict liability under Restatement (Third) of Torts. Software has historically been treated ambiguously — sometimes as a product, sometimes as a service. For autonomous vehicles, this classification has enormous consequences. If the software is a product, manufacturers face strict liability for defects regardless of fault. If it is a service, plaintiffs must prove negligence in the software's design or implementation, a significantly higher burden.
The Regulatory Patchwork
At the time of publication, no federal legislation governed autonomous vehicles. States were experimenting with their own frameworks — Nevada was the first to authorize autonomous vehicle testing in 2011, followed by California, Florida, and Michigan. This patchwork of state regulations created compliance challenges for manufacturers operating across jurisdictions, a situation that persists today despite multiple attempts at federal legislation.
The challenge of regulating technology that evolves faster than the law can respond connects this article to the journal's broader coverage of emerging regulatory frameworks and the tension between innovation and existing legal structures.
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Frequently Asked Questions
Who is liable when a self-driving car causes an accident?
Liability depends on the circumstances and jurisdiction. Potential defendants include the vehicle manufacturer, the software developer, the component suppliers, and in some cases the vehicle owner. Courts are still developing the legal framework for allocating liability among these parties.
Is autonomous driving software a product or a service?
This classification remains legally ambiguous. If treated as a product, manufacturers face strict liability for defects. If treated as a service, plaintiffs must prove negligence. The distinction has significant implications for autonomous vehicle litigation and insurance.
What federal laws govern self-driving cars?
As of 2018, no comprehensive federal legislation governs autonomous vehicles. Regulation has primarily occurred at the state level, creating a patchwork of different rules. Multiple federal bills have been proposed but none have been enacted into law.