Driving under the influence of alcohol is a growing cause of traffic injuries according to studies. Teenagers are at especially high risk of developing alcoholism if they start drinking early. Rates of alcohol abuse are highest among 18-29 year olds. The legal limit for blood alcohol concentration while driving in India is 30mg per 100ml. If caught driving drunk, punishments include fines and imprisonment. Ignition interlock devices can help prevent drunk driving by requiring the driver to pass a breathalyzer test before starting the vehicle.