Now a days Large no of road accidents are happening, which causes loss of life. As life is very precious which can't be brought back, some preventive measures need to be used to alert the driver to avoid the accidents. Here INS-GPS integrated system is used which will give the present position of the vehicle precisely. The INS-GPS system can be integrated with digital maps which will alert driver when there is scope for accidents such as T junction. In some situations it may necessary to control the speed of the vehicle based upon the geographical position. The position obtained from the integrated ins-gps system is used to limit the speed based upon the condition given by an authorized person. The Doppler sensor is used to alert the driver when his vehicle is approached by another vehicle with more speed. This system is most useful in single lane roads