This paper is aimed at developing a vehicle crash detection system using Arduino, GPS, GSM and accelerometer. Accelerometer detects the sudden change in the axes of vehicle and GSM module sends the alert message on your mobile phone with the location of the accident. Location of accident is sent in the form of Google map link, derived from the latitude and longitude from GPS module. The message also contains the speed of vehicle in kilometers per hour. The proposed model can also be used as a tracking system and much more, by just making few changes in hardware and software. The alert system has been developed in real time and performance is discussed.

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