an visual interface for the human take-over of automated driving.
Interface Design, Human Factor Analysis, Concept Simulator Testing
With the uprising of advanced driving aids, there is a need for proper interface design that communicates the autonomic activities of the car to the driver. The subject in this project was “Traffic Jam Assist”, a system that enables an automobile to drive automatically in traffic jams. However, when one of the system requirements is not present, the driver has to take over.
This project was the result of my bachelor’s graduation assignment in Industrial Design at the University of Twente.
Traffic Jam Assist is active when the system detects the lines of a driving lane, has a car in front of him to follow and drives not faster than 50 km/h. When one of these requirements is not present, the interface “visually asks” the driver to to take over steering and the throttle and braking or one of both.
I would be too complex for a driver to hand over the driving task to the car in one step. Therefore, three levels of automation were implemented. In the information state the driver is in control and the system only informs about possible danger. In the take over state the car takes over the driving task. This could be solely handling the throttle and braking (in longitudinal direction), or solely steering (in lateral direction). When both tasks are taken over the car is in complete control and Traffic Jam Assist is active.
Two variants were developed: one visualising what the driver has to do (below left) and one that informs about the active automation systems of the car (below right). A visualisation is shown of a possible take over situation:
1) A car cuts in the lane of the driver, in front of the car.
2) The system warns that the driver has to take over steering and braking. when the dangerous situation has disappeared, the system returns to its information state.
3) After a while the take over state becomes available again. Two variants of the interface have been compared. The left clip shows the required take over from the driver’s perspective.
4) The right clip shows the active states of the automation system.
The two interface variants were tested and compared in a driving simulator environment.