Working of Accidental Information System (gsm and gps based) is very simple. Its has a pressure sensor which is tune to a accidental level of pressure. When accident is happened, this sensor detect it and send its information to the central processing unit (CPU). Microcontroller in CPU is then read the location of the accident using GPS module and make a automatic message and sent it to the pre-saved contact mobile address using GSM module. Microcontroller also activated alarm and some vehicle function to prevent further loss.