Now a days most of the countries are enforcing their citizen to wear helmet while riding bike and not to ride bike when the person is under the influence of alcohol, but still rules are being violated. In order to overcome this problem, “Smart helmet for bike riders ” is developed. It consists of an intelligent system embedded into the helmet and the vehicle. Helmet unit ensures that rider is wearing helmet and not under influence of alcohol through out the ride. It communicates with vehicle unit to switch o n ignition system of bike if above condition is not met. Vehicle unit checks and intimates accident through geometric coordinates via SMS. By using geometric coordinates, location of the injured rider can be traced using simple GPS tracking application. Also, this system provide theft protection as helmet is also essential along with key to start bike. Motivation The road accident is one of the major problems all over the world. The recent report says that the annual a