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Currently there are seven approved IID manufactures and ten different IID devices approved for use in Missouri. At the present time there are 7000 to 8000 drivers  required to install and maintain an IID on any vehicle that they operate. This number fluctuates from month to month because of drivers being ordered by the courts or the Missouri Department of Revenue (DOR) to install the devises and complete  the program. A list of certified manufactures can be found on-line at:

Oversight of the State’s Ignition Interlock program rests with the Missouri Department of Transportation (MoDOT), Traffic and Highway Safety Division.

Additional resources or answers to questions concerning the Ignition Interlock Program can be found at:




androidDownload the “Show Me My Buzz” App

Available now on the iPhone App Store

Download the new smartphone app that lets you estimate your BAC and helps get you a cab. Check your BAC before you drive or check-in at the local jail.

“Show Me My Buzz” allows users to calculate their estimated blood alcohol concentration (BAC) based on how may drinks they have consumed, how long they have been drinking and their gender. It will even provide the phone number of a local cab company with just a tap of the screen.

The BAC calculator is only a guide that estimates averages. Alcohol affects everyone differently. Influencing factors include food consumption, medication, health and psychological conditions. The best plan is to always designate a sober driver. A sober driver is someone who has not had anything to drink.

In 2011, 218 people were killed and 867 seriously injured in crashes involving a drunk driver.

Disclaimer: This blood alcohol concentration (BAC) calculator is only an estimate and is not sufficiently accurate to be considered legal evidence. The calculations are averages. Individuals may vary in their personal alcohol tolerance. Food in the stomach, medications, health and psychological conditions are influencing factors. Many establishments that serve alcohol serve portions larger than the standard drink size.

More information on impaired driving

• Save MO Lives website
• Alternatives to Impaired Driving
• Driving While Intoxicated brochure (1.12 mb, 2 pages)
Ignition Interlock Devices
• Instant of Choice Memorial website

Links to other safety pages

• National Highway Traffic Safety Administration
• The Missouri Coalition for Roadway Safety
• Stop Impaired Driving

The documents are provided in Acrobat Reader format. Free Acrobat Reader download

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