Direction detector system of an emergency vehicle for ITS by using code division multiple access

Various methods are proposed for the practical use of ITS. We achieve the detection of emergency vehicles such as ambulances and fire engines by measurement which uses a spread-spectrum method. We propose a method in which another vehicle and the signal can detect the position of emergency vehicles. This method transmits different code spread-spectrum signals from the four corners of emergency vehicles. As a result, because the direction from which an emergency vehicle approaches is understood, evasive driving becomes easy for securing the traffic road, and signal control also becomes easy. As a result of experiment an excellent detection result was obtained.