Only used in Eldon's Command Cassette series. Six screws can be adjusted to change the driving pattern.
Plastic cards with a preset course, and cardboard cards for cutting your own custom driving patterns. One side controls the movement (forward, neutral and reverse), the other side is for the direction (left, right and straight).
This is probably the most simple type: 4 puppets each have their own driving pattern. Just change the puppet in the driver position and the car will drive accordingly.
Computer cars of the late 1970s allowed sequences of movements and actions to be programmed and stored on a microchip. Not only movements can be included, but also actions like flashing lights or sound effects.