Even a shopping trolley has a steering mechanism (the handle) so I can't see a time when a vehicle doesn't have anything. How do you steer if the battery is dea

Even a shopping trolley has a steering mechanism (the handle) so I can't see a time when a vehicle doesn't have anything. How do you steer if the battery is dead, ferinstance? When it comes to the shape of the steering device, a wheel has more scope for fine-tuning of the direction than a lever, or joy-stick.