This study was conducted to develop a human machine interface (HMI) system which can promote hazard perception among senior drivers to induce them to drive more carefully. As the first step of the study, we designed an HMI system to prevent stop sign violation at intersections because violation at intersections is a major cause of traffic accidents caused by senior drivers. The HMI system was designed to induce safe driving by notifying drivers that they are approaching an intersection and by presenting voice announcements with feedback information when he stopped at the intersection. Feed-forward was set up to induce safe stopping at intersections. Feedback was set up to give a psychological reward to safe stopping and to induce continuous safe driving. An efficacy test on the HMI system was conducted with nine senior drivers and seven female drivers (30's to 40's) by using a driving simulator (DS). The test results showed that their starting to decelerate tended to become earlier with the HMI system. The evaluation of the HMI system revealed that the acceptability of the system among the drivers was significantly high. These results indicated that the HMI system was effective in inducing senior drivers to drive carefully at intersections.