Intoxalock Ignition Interlock in Madison, TN is here to help get you back on the road after a DUI. When you compare Intoxalock to other ignition interlock devices in the market, it's easy to see why it's a top choice among customers, state administrators, attorneys and more. We are your partner through the process and can educate you on state ignition interlock device laws and regulations. Intoxalock has over twice as many locations as any other provider. In almost every situation, we have an installation location within ten minutes of your home or work. Our installers are professional and certified by the state. For over 25 years Intoxalock as been a trusted partner for ignition interlock devices. Call today to learn more! Cartronics is an authorized dealer for some of the very best merchandise in the industry. We offer installations and warranties with all of our products. In addition, Cartronics has been an authorized ignition interlock installer for Intoxalock since 2009.