Intoxalock is the no. 1 ignition interlock device brand in the U.S., and Intoxalock Ignition Interlock in Hillsboro, MO is here to help you get back on the road after a DUI. Intoxalock has more locations than any other provider, and we can find an interlock location near you. We will help you understand MO interlock, or IID, laws and regulations. Our interlock calibration locations are staffed with certified professionals who will maintain your car breathalyzers. For 30 years, Intoxalock has been a trusted interlock ignition device provider. Call now to talk to a MO expert.