Abstract
The study focused assistance systems on stop intersections for elderly drivers. The three-step assistance system, giving ‘advisory ’, ‘warning’ information and brake intervention, was evaluated in the JARI proving ground. The control logic of the system was renewed depending on the results of the past study. The results indicated the new logic improved drivers’ acceptance of the ‘warning’ phase as well as ensuring the effectiveness of the system. The deceleration timing became earlier and approaching speed became slower when the system applied. The results also clarified the timing of the brake intervention should be determined depending on the visibility of intersections.