What transport invention did Leonardo da Vinci design that could move without being pushed by an animal?

Leonardo da Vinci designed a self-propelled cart that could move without being pushed by an animal.

The cart appears in Leonardo’s drawings from the late 15th century. It used coiled springs as a power source, with the stored energy transferred through mechanical components to the wheels. A programmable element, often compared with a modern cam mechanism, could help determine the cart’s route or movement.

The device was probably intended for theatrical or ceremonial use rather than ordinary transportation. It may have been able to travel a short distance on its own, making it an early example of a mechanized vehicle. Leonardo’s surviving drawings do not answer every engineering question, so reconstructions differ in their interpretation of the mechanism.

It is often called Leonardo’s automobile, but that modern label can mislead. The cart was not powered by an engine, fuel, or electricity, and it was not a practical road vehicle. Its importance is that it combined stored mechanical energy, wheels, and automatic movement centuries before motorcars appeared.