A car with nobody driving raises a question every part of the legal system was built to avoid asking: who is responsible when the decision was made by software. This article explains the actual regulatory structure, which is thinner than most people assume and split between federal vehicle standards and state driving rules. It covers the levels-of-automation framework and why it matters legally, the preemption doctrine that governs vehicle safety claims, and how a crash case is actually built when the driver is code. It then covers data — the richest evidentiary record in the history of vehicle litigation — and closes with drones, delivery robots, and industrial robotics.