car accident identification and notification using gsm and gps

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TITLE: CAR ACCIDENTS IDENTIFICATION AND NOTIFICATION USING GPS AND GSM TECHNOLOGIES

What are the previous or current related work in Africa?? And where have they reached??
What can be the methodologies?
What can be the suitable steps and techniques to be used in solving the problem
Which devices can I use to accomplish the task above? i.e Hardware and software
The coding techniques to integrate the devices
What are the costs of each devices
What can be the overall cost??

Any other suggestions apart from the questions I have asked above??