Autotests involve driving your car (road car or autotest car) on a timed short route, with penalties added for striking markers and not completing the test correctly. The driver who completes all the routes in the lowest time wins! HMC run several sealed surface and grass production car autotests during the year, usully all forward direction.
All forwards autotest video – https://www.youtube.com/watch?v=UBGE-phVxKA