An experimental analysis of driver's attitudes towards in-vehicle warning system at stop sign controlled intersection

Most traffic accidents occur at unsignalized intersections, mainly due to inappropriate behavior of non-priority vehicles. The authors have developed an advanced Intelligent Speed Adaptation (ISA) system with GPS/GIS to provide warning to stop failure vehicles at unsignalized intersections. In this study, experiments related to driver attitudes toward stop sign warning were carried out. At a drivers' training course, drivers' attitudes were tested using a vehicle equipped with the warning system in order to ascertain appropriate timing of warnings when approaching intersections. The driver's evaluation and willingness-to-pay for the warning system were also analyzed using an interview survey answered by testers.