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What Is an Ignition Interlock Device (IID)?

A breath alcohol ignition interlock device (IID), or ignition interlock system, is a mechanism like a breathalyzer that tests for alcohol on a driver's breath. An IID, however, is installed in a vehicle to require a driver to breathe into the device before the vehicle can be started. If the driver's breath alcohol concentration (BAC) is over the programmed limit (typically .02% to .04%) the vehicle's ignition is disabled and the vehicle will not start.

The U.S. Government's National Highway Traffic Safety Administration (NHTSA) maintains a " Conforming Products List" (PDF download) of breath alcohol devices approved for law enforcement use. Interlocks that meet the NHTSA standards not only require a test to start the engine, but also require a test every few minutes while driving - a "rolling or running retest." This type of test prevents an individual other than the driver from starting the car and then allowing an impaired driver to drive the vehicle. (NHTSA guidelines for most regions call for only one subsequent test). Ignition interlocks can be difficult to circumvent when properly installed and monitored regularly.

The amount of time an individual is required to have ignition interlock on his or her car varies based on prior offenses and other restrictions. See which states require ignition interlocks.

Steps for using an Ignition Interlock:

  • Get in car and put on seatbelt.
  • Push button on Ignition Interlock.
  • Wait for confirmation messages to appear.
  • Blow into mouthpiece.
  • Wait for "pass" (or "fail") confirmation messages to appear.
  • If "pass", place keys in ignition and start vehicle.

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Posted Friday, March 23, 2007
Filed in BAC  | Permalink |  Comments (8)
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Posted by Jacob Kiniry at 2008-11-06 12:48
Do not use hand sanitizer. I had sanitizer in my car and used after cleaning an office. I work for cleaning company used the sanitizer then wigglede my hands to dry them. I smelled the arromma of the sanitizer which has 62 percent alchol and then popped open my cap to drink water as directed. I teseted .032,.030, and then .025. Not sure if it was being in a confined space and smelling it or popping cap for my water. Now I had to pay 50 dollars after i violated 3 times. I had to call smart start. Go down to the hearings officer at registry. That is where I am at now. i am not sure what is going to happen as these people think i was drinking. They never tested hand sanitizer as I asked them. This cost me 50 dollars time and may cost me money on lawyers and god only knows if i will lose my license. I have not drank in two and a half years also. I just wanted to let you people know Do not use hand sanitizer in your car and if you use stay away from a pop cap water mug. You do not want this to happen to you!
Posted by Kelly at 2008-11-11 19:59
I own a ignintion interlock company in WA and you blew as the sanitizer was on your hands and when you inhaled to blow you got some of that alcohol in your lungs and blew high. What a shame, your company knows exactly what happened. Call me with any questions 509-750-1092, Kelly with Blow First
Posted by yoseph schennawy at 2008-11-13 02:27
so now you're beating yourself up for using a hand sanitizer! next time they might fine you and probably charge you for using a mouth wash!I think it's about time you and others
in similar situations stood up for that campaign of injustice and irrationality launched by groups motivated by personal and political agendas or derived by hate and revenge and could
care less about solving problems,improving lives or serving justice.those silly authoritarian DUI laws are just another example of the continuous attempts by those groups to take away our freedom and civil rights in the name of "safety"and
to drag us in the direction of becoming china or north korea!
it's time to fight back and keep America free.
Posted by Jacob Kiniry at 2008-11-14 12:15
I do think it has gone to far with the interlock devices. It is proven effective though. It is MADD that has pushed things like this to accure. Can you blame them I would be pretty MADD if my kid got killed.
They have taken it a little to far though. It is a good thing but has alot to do about money not just kids getting killed. Alot of lawyers own these company's. They are making alot off of drunk drivers which I do not agree. Alchol is like a disease and this thing should be for the benefit of the people and not the benefit of greedy people with money. making money off peoples misery is not cool. This was not cost efficeient going threw what I did and i paid for my mistake. People will move to another state or just drive with out it is the real problem becasue it cost so much to get threw this! It helps but then it creates more problems and if alchol is considered a disease then it should be alot cheaper.

They have bars and restaurants all over the world. They sell alchol and how many people have a designated driver. Not that many. One drink and you are drunk. If you go out to dinner and have 2 glasses of wine you are a drunk driver. The point I am trying to make is everyone has done it. Unless you do not drink at all. They should be going after the buisnesses and restaurants but they would never do that because of money.

The world revolves around trying to make and get money. This is just another opportunity to do that. There are pro's and con's to everything. All I have to say is just hope it does not happen to you. Did you know that law that just passed was because of Melony that died by a drunk driver. Her father got caught drunk driving a week after the incident. IRONIC isn't it. Someone i know that knows a politician got out of a drunk driving in just one call. When you have money and know people anything is possible. The rest of us are stuck in losing are licenses and making these company's rich with our own stupity!

One thing I do not appreciate is being called a lier. The breathelizer company did not belive me. Man I went threw to much do get my license back to do something stupid and drink and blow into that thing. They did not believe me. I asked them if they tested the hand sanitizer they said no. Then he of course the owner said that it was approved by so state org. Shoot they approve pills all the time and they take them off the market because they kill people. Well going way off course here. I was not drinking and do not like being called a lier. I felt like a guy inprisoned for no reason. I felt low. That is not acceptable. That is why the guy above was freshing to here. he owns his own company and kept his info just incase I have issues with this nonsense.
Posted by Nancy Watt at 2008-12-07 11:12
Hey there,
I live in Ma.and have a SmartStartIID in my vehicle...I have had SO many issues with this company and now I've a hearing scheduled for 12/16/08, in Boston, approx. 2 1/2 hrs from where I am in western Ma. I've only had this in my car since 7/1/08 and have had SO many instances where the unit wasn't acting properly, aborting this, aborting that, it's only been 5 months and it feels like a lifetime of hassle. Absolutely no alcohol, nor tampering, and flat out Smart Start has lied to me about how they'd send Boston IID Division a clear and concise statement that "SKIP WAS DUE TO SYSTEM PROBLEM" - and I've documentation for all my encounters with this vendor and their device - but, why in god's name should I have to go through all of this?? I'm "red-flagged" @ the RMV due to what SMartStart stated I had 2 valid missed re-tests in Oct. 08. On 10/08/08 in the parking lot of an AA meeting, where simultaneously turning the ignition off a re-test came on and of course since the engine was turned off it was an immediate missed re-test. Called and reported incident to SmartStart-this exact situation repeated itself TWO nights later, called them AGAIN, of course now I've an InterlockViolation, service @ their 800# now tells me to go to my installer-have it switched from mode 0(key) to mode 1(voltage)...did this the next a.m.-now RMV is doubting me, SmartStart first started out being "helpful"...naive me, of course they won't admit their state-of-the-art device has caused me nothing but hassles...they could lose their standings/contract with being a vendor. My DUI was found in the courts as a 24-D, 1st offense was 1990, was sober for 18 years...now I have to travel from western Ma. to Boston for my hearing, tried Spfld, Ma-no, it has to be done in Boston. AND, they'll suspend my license/right to operate should I not represent myself well(hate speaking in front of people,nevermind this,even though I've info. I've logged w/each problem)...let's see...12/26/08...10 YEARS FOR BEING SOBER AND DOING ALL THE RIGHT THINGS??? Has ANYONE in Ma. had SmartStart as their vendor? I feel like Erin Brokavitch(?sp)...I shouldn't have to fight so hard for being right...DON'T CHOOSE SMART START AS YOUR VENDOR!!
HELP???? God I pray there is someone out there who'll reply to me!
Thanks so much, and I'm trying like heck to have faith.....Nance
Posted by yoseph schennawy at 2008-12-08 02:08
I wish I have something positive to say to help reduce your anxiety and frustration but I think it's more useful to be completely aware of the cold reality of the situation than going to your hearing with a false sense of confidence.away from all the technicalities particular to your case,the reality is,DUI laws and procedures weren't exactly designed
to have the offenders'best interest or convenience in mind nor were they designed to serve justice or improve lives!they're simply meant to make money for the state,attorneys, vendors,labs and alcohol programs"justifiably"at the expense of those"criminals"who had a beer and drove!the attitude towards DUI offenders is they're criminals who have no much credibility and this is in large thanks to MADD!as for the interlock vendor,you're completely right!there's no way in hell the crooks are going to help you out by saying"our product is a fraud"and lose their fat contract!point is,do NOT expect"friends"in that hearing whether you've been doing the right thing for the last 10 20 or 30 years or not because honestly they could care less!if you have the financial means go get a lawyer!be more aggressive when communicating with the interlock people and let them know you're willing to take things to the"next level"if they don't fix the problem. if you can't afford a lawyer,try to get AS MUCH free consultations as possible just to get a good idea about what to expect and how to prepare for it.it's a good thing you documented everything,so if you have to represent yourself you have a solid case.just be calm and collected and remember that you're on the RIGHT.good luck
Posted by pissed at 2009-06-18 12:16
I've had my IID unit for about 2 months now. This is my first DUI offense, and I've never had any other alcohol related issues. I don’t even drink much, about once a month maybe. My unit is extremely intermittent; it will work on the 1st or 2nd try sometimes, and will take 10-15 tries others. There have been 2 times over the last 2 months where the unit just won't work; it just keeps aborting. I'm not opposed to the program, but maybe we could get units that actually work. They do exist. I figure the $120/month should cover a more stable unit. If these programs are about making our roads safer, why not extend similar punishments to all potentially fatal driving behaviors such as talking on the phone while driving. Cell phone related deaths are now up to about 2800/year in this country. But that potentially fatal driving behavior is completely legal, and even encouraged. The reason DUI type penalties are not applied to other fatal driving behaviors is due to pandering to a vocal minority group; MADD. If we want safe roads, we have a loooooong way to go. The only way to make our roads safer is for the public to get honest about potentially fatal driving behaviors. In the meantime, we need IID units that actually work.
Posted by fumming at 2009-06-23 16:00
smart start left me standed @ a gas island 20 miles from the calibration station. The little l e d lights never came on when I tried to start the car. I called the company and they said 2 take it 2 the midas where I take it every month and 2 have him give me a new device. I ended up having 2 spend 40 dollars for a cab 2 take me 2 the midas. What I find particulaly strange is this is the second instance in which smart start left me stranded and they just tell you 2 get a new device but why dont I ever get any sort of documentation from them? This whole system is nothing but a tremendous double standard. And we are forced 2 pay for this !
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