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Ignition Interlock Devices in Maryland

Ignition interlock devices connect a motor vehicle ignition system to a breath analyzer. It measures a driver’s blood alcohol level and prevents a motor vehicle from starting if the driver’s BAC is higher than the allowable setting on the device. (See § 27-107). In Maryland this BAC is approximately 0.02.  Ignition interlock devices may be implemented upon the discretion of the court. They may be implemented as a sentence, part of a sentence or probation.

A driver may be required to participate in the Interlock Program if (a) the individual’s license is suspended or revoked for violation a DUI/DWI (b) the person is ordered to participate in the Program by a court (c) the person’s license has an alcohol restriction imposed onto it (d) the Administration modifies a suspension or issues a restrictive license to the person. (See § 16-404.1). A habitual offender may not have his license reinstated unless he or she participates in this Program for at least 24 months.

If requested by the driver, the Administration may issue a restricted license for the period of the suspension of the driver who participates in the Ignition Interlock System Program (§ 16-205(d)).


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