In the tradition of seat belts, shatter resistant windshields and air bags, ignition interlocks appear to represent a unique means of better protecting the public from a primary source of automobile related trauma - intoxicated drivers.”

Source: Jeffrey Coben, M.D., Center for Violence and Injury Control

What is an ignition interlock?

An interlock is a breath analysis device that is installed in a motor vehicle.  The interlock device prevents an alcohol-impaired person from starting the motor vehicle.  Retests are randomly required during operation of the vehicle. The interlock system records dates, times, test results, engine runs and engine offs.  This data is provided to designated authorities and used to determine compliance with the interlock program.

Will the unit shut off the engine?

No.  An interlock device does not shut off a vehicle’s engine or stop it abruptly in its tracks.  If a Retest is failed or if the Retest is not presented when required, a violation will be recorded.

What if the vehicle stalls in traffic?

The interlock allows a free start; the vehicle can be restarted within this time without another breath test.

How much does it cost?

The cost for an interlock device is usually between $2.40 and $2.80 per/day (which is less than 1 drink/per day).  This fee may includes regular monitoring, calibration, and reporting to the specified agencies on a monthly basis, or as required.  Additional fees are charged for unit installation, removal, and non-scheduled service. 

“Alcohol has proven affordable to most offenders and its monthly cost very likely exceeds the monthly cost of an interlock program”

Source:  International Council On Alcohol, Drugs and Traffic Safety (ICADTS),

Position Paper, July 2001

Will the interlock record “false positive” tests?

The Draeger Interlock® utilizes electrochemical fuel cell technology which is alcohol specific.  The Draeger Interlock® will not show a positive alcohol result for non-alcohol airborne pollutants. 

How often will the interlock need to be monitored?

The monitoring time interval is 60 days by DAAD Ordered Interlocks and 30 day by Court Ordered Interlocks.  This monitoring check or monitoring and calibration check will take approximately fifteen (15) minutes. 

Can someone besides the driver provide the test?

Yes.  A non-compliant user might request that someone (a stranger, family member, teenager) provide a passing breath sample, and the interlock does not positively identify the driver.  The Retest feature, however, requires subsequent random breath samples during the journey, and shortly after the engine start.  In addition, the breath sample must meet a volume specification and be presented in a unique manner, Incorrect breath presentation is documented in the events log.

After the interlock is installed, is technical support available?

Yes.  New Horizon Interlock Inc. takes pride and values you and your repair facility and is always there to assist any repair facility 7 days a week.

After the interlock is installed, when can I get it removed?

The State may require you to have the interlock installed for 365 days or longer before it can be removed, however you can have the device removed at any time. Please be aware that we do not receive all drivers restriction extensions and it may or may not apply to you. Example; Traffic Infraction and/or DAAD Hearing Review deemed a extension. You may then be in non-compliance with your restriction. Early removal and/or cancellations fees may apply.