Abstract—This paper proposes to create a communication system
between cars to prevent and also to handle an accident. In the
case of accident prevention, the system broadcast information to
other cars about the condition of the surroundings by giving a
warning notification upon some event, such bumpy road, speed
bump and sudden brake. The system uses an Android based
smart phone as the main platform. It utilizes the phone’s internal
built-in sensors for the event detection and localization and
employs Wi-Fi Direct for the fast and cheap inter-cars
communication to other Android devices in the surrounding
areas. In the case of accident handling, the system implements an
automatic emergency request by sending an emergency related
data to dedicated numbers when the car is involved in an
accident. The overall system has been tested for above sample
situation in a real car on the roads and it proved to be very
responsive and readily deployable with no additional hardware.
Acquired sensor data are displayed on a map in the receiving
Android Smartphone. The communication system between cars
can lead to useful applications that help promote safety. By
incorporating the information from the system’s peers, the peers
can cooperate together to prepare for any unwanted incident.