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ignition_interlock | by VCU CNS
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ignition_interlock

An ignition interlock is a breath test device linked to a vehicle’s ignition system. Before starting their vehicles, drivers must first blow into the device. The vehicle will not start unless the driver’s blood alcohol concentration (BAC) is below a pre-set standard. (Photo courtesy of the U.S. Department of Transportation)

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Taken on February 24, 2012