Ignition Interlock Restricted License

An Ignition Interlock is a device that is installed on motor vehicles to prohibit individuals from operating a vehicle while under the influence of alcohol. It requires your breath sample before the engine will start and you are periodically required to provide breath samples while driving. If the device detects an elevated alcohol concentration level, the vehicle will not start.

What does "DUI Per Se" mean?

§ 42-4-1300.3.(3) C.R.S. defines "DUI per se" as meaning "driving with a BAC of 0.08 or more, and use of the term shall incorporate by reference the offense described in section 42-4-1301(2)(a)."

Man sitting in drivers seat of car breathing into an ignition breathilyzer device before the car will start

Important Information

Legislation, effective January 1, 2014, has significantly changed previous law involving alcohol violations, Persistent Drunk Drivers (PDD) and the Ignition Interlock program. Those changes include:

The reduction of the Blood Alcohol Content (BAC) on a chemical test from 0.17 to 0.15 to designate the driver as a Persistent Drunk Driver.

The refusal of a chemical test at a traffic stop on or after, January 1, 2014, will now result in a Persistent Drunk Driver designation.

If a driver refused a chemical test prior to January 1, 2014, and was previously ineligible to reinstate early with Interlock, they may now either finish serving the remainder of their revocation and reinstate with full driving privileges, or serve at least two months and apply for early reinstatement with Interlock for one year. They are not eligible for Financial Assistance in this case.

If a driver has multiple alcohol violations or refusals on their record, the wait time for early reinstatement with Interlock has been reduced to up to two months.

You Will Be Required to Have an Ignition Interlock Device if:

You were Arrested for Driving Under the Influence before January 1, 2023