Analysis of Drivers Information Requirements for Adaptive Cruise Control (ACC) Functions

The purpose of this study is to analyze the information requirements of the driver in using the Adaptive Cruise Control (ACC). The ACC is one of the most important function of the recently developing Advanced Driver Assistance Systems (ADAS). The ergonomic design of the ADAS display is crucial for the safe use of the ACC. That is, the system should be able to visualize and present the necessary information to the driver in a suitable form and in a timely manner. This requires an analysis of the information requirements that drivers need before considering ergonomic visualization options. In this study, the information requirements of the driver using the ACC were identified and converted into variables. Then, the availability of the information and relations between the variables were determined. First, we derived the information needed by the driver from the hierarchical task analysis and expert interview, and translated them into variables. Using the classification proposed in the literature, the derived variables were classified into five types according to availability. The relations between the variables were investigated. The information requirements from this study can be used as basic data to improve the display design of ACC and to propose a new visualization concept. In addition, it is expected that the variables that are not currently measured or inferred in the present system can be used for improving the system by adding sensors and improving the performance of the inference system in the future.