A modern car can cut engine power, tighten seat belts, and even steer around an obstacle, yet in legal terms it remains a tool, not a driver. Automated emergency braking and lane keeping systems are classified as assistance, designed to reduce kinetic energy and prevent loss of control, but not to assume autonomous command of the vehicle.
This separation rests on how traffic law defines a driver as the human who exercises overall control and forms intent, while software is treated as a safety feature, closer to an airbag or anti lock braking system. Even when algorithms process sensor fusion and make split second decisions, regulators frame those actions as extensions of human agency rather than independent choices.
Liability therefore follows two tracks. If a human misuses or ignores the system, fault analysis points to negligence. If code or sensors malfunction, the case shifts toward product liability and design defect, not criminal responsibility for the machine. Policymakers have been slow to rewrite legal personhood, leaving powerful vehicle computers free to overrule a pedal press in emergencies without being named as the driver in a crash report.
