A robotaxi is a ride-hailing vehicle that drives itself and carries paying passengers with no human driver behind the wheel. It is the commercial endpoint that most of the lidar-heavy autonomy companies have aimed at: not selling a car to a consumer, but operating a fleet that earns money per ride, like an Uber without the driver. In SAE terms a working robotaxi is a Level 4 system, fully driverless but only inside a defined operational design domain.
Waymo, whose stated mission is to “make it safe and easy for people and things to move around,” is the clearest example, having moved from supervised testing to genuinely driverless paid rides in Phoenix and then other cities. Baidu’s Apollo Go pursues the same model in China. The business logic is compelling on paper: the driver is the largest single cost in ride-hailing, so removing it could transform the economics of urban transport. The catch is that getting to “no driver” safely, and then expanding the service area, has cost many years and many billions of dollars.
The robotaxi is also where the field’s failures become most public and most consequential, because real passengers and pedestrians are involved. Cruise’s 2023 suspension in California, after a pedestrian-dragging incident, is the cautionary counterpart to Waymo’s steady expansion.
For a general reader, the robotaxi is the concrete product that the entire self-driving industry has been building toward, and watching which companies actually run one, in which cities, under what conditions, is the most honest scoreboard for how far autonomy has really come.