An effective solution is provided to develop the intelligent system for vehicles which will sense the various levels of alcohol present in the breath of the driver and would respond accordingly. The system adopted different principles as explained in this paper, by using hardware platform who‘s Core is Atmega8, Alcohol sensor mq3,Ultrasonic sensor, GPS & GSM module. The communication with preregistered phone numbers in this designed system is done via GSM, GPS and control of various parameters. The whole control system has the benefit of small volume and high reliability. Future scope of this system is to decrease accident numbers and providing useful details about the accidental vehicle, thereby reducing the rate of accidents taking place due to drunken driving. This system brings modernization to the existing technology in the vehicles and also maintains and improves the safety features, hence proving to be an effective development in the automobile industry. GPS alcohol detecting and engine locking system using GSM system has been successfully implemented. This system divided into three sub system GPS, GSM and Arduino Nano subsystem. When the MQ3 sensor are detecting the alcohol in the car then beeping a sound in car that means altering to driver and GPS is use for the position of the car in the from longitude and latitude format. This longitude and latitude are receiving by the GSM with help of Arduino system GSM forward this information to the user or owner mobile number who is preregister and then the user can be tracker location of the car and the Engine of the car will be stop. This work aims at designing an obstacle detection system using an ultrasonic sensor interfaced with an Arduino board to track location, alert will be generated send SMS by using GSM module. When person is detected by using ultrasonic sensor the engine will be slow down when a person is very near to ultrasonic engine will be automatic stops this SMS and location will sent to Authorized person using GSM and GPS.