The program of the road safety system was developed based on the Global Position System and acceleration device of a smartphone. The program could offer the road safety. The program can report a case to the authorities automatically when a road accident happened. The program also will call the family of the owner and call the agent of the insurance company immediately to take care the car accident. The program also provides the necessary information of the standard operation procedure for a car accident. The information database of the owner was setup first in this road safety system to provide the information for reporting to the authorities. Then the corresponding sensors of the smartphone are activated to detect the conditions of car accident. And the automatic reporting system is started instead of the disabled owner when injured in the car accident. The final subsystem of the road safety system is the information provided system for car rescued and SOP of the car accident.