Radar technology, using radio waves to detect vehicles and pedestrians, is expected to improve the functionality of monitoring systems in order to prevent accidents at intersections. Panasonic has developed high-precision and wide-angle-scanning radar technology using high frequency radio waves. This technology can detect objects up to 40 meters away, such as pedestrians and bicycles, separated by as little as 20 centimeters, in only 0.1 seconds. By applying this technology to the 79GHz band of millimeter-wave radar, we can expect the evolution and promotion of traffic safety support systems such as surveillance sensors, to prevent accidents in intersections.