Just How Accurate is an Ignition Interlock Anyway?

Tens of thousands of drivers across the country are using ignition interlocks to fulfill their court or DMV requirements. An ignition interlock is a device that prevent a car from starting if the driver has been drinking.

Some people worry that interlocks aren’t accurate — that their vehicle will fail to start even if they haven’t been drinking.ignition-interlock-accurate

There is no need to worry. The National Highway Traffic Safety Administration has established standards for all ignition interlock devices to ensure that they are accurate and reliable. Independent laboratories test every interlock device to ensure they meet NHTSA’s strict requirements.

The testing doesn’t stop there. Drivers using an interlock are required to bring in their vehicles at regular intervals for calibration. The interlocks are tested using an alcohol solution of a known concentration, to make sure that the device registers the amount of alcohol correctly. The solution is monitored and checked regularly by government authorities to make sure that the calibration is being done correctly.

If needed, adjustments are made so that the interlock is giving an accurate picture of the blood FC100alcohol concentration (BAC) of the driver at all times.

If you are required to install an ignition interlock, today’s alcohol-specific fuel cell ignition interlock technology — the most accurate technology available — is working to help keep you on the road. All you need to do is remember not to drink before driving, and you’ll be on your way.