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  • New Customers
    • RoadGuard’s Ignition Interlock Device
    • DUI Laws by State
    • What Is an Interlock?
    • Schedule Interlock Installation
    • State License Reinstatement
    • Ignition Interlock for Hearing Impaired or Deaf Drivers
    • Ignition Interlock Device Cost
    • Why RoadGuard Interlock?
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  • Existing Customers
    • Contact Customer Support
    • All Support Topics
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Discover the RoadGuard Interlock blog and learn about ignition interlock devices, DUI laws, and get safe driving and responsible drinking tips.

How to Legally Challenge a False Positive Interlock Reading

False positive interlock breathalyzer reading? Here’s how to legally challenge it, what evidence helps, and the immediate steps to take.

Navigating Interlock Requirements with No Vehicle Ownership

Interlock device no car ownership requirements explained: how to comply when you don’t own a vehicle, employer-vehicle paths, and state alternatives.

Understanding IID Look-Back Periods for Repeat Offenders

IID DUI look-back period explained: how state lookback windows affect repeat-offender penalties and how long ago counts as a ‘prior’ DUI.

Employer Exemptions from Interlock Devices Explained

Employer exemption interlock device requirements: when work vehicles qualify, what your employer signs, and how to file the right paperwork.

Can You Drive for DoorDash or Amazon Flex with an Interlock?

DoorDash Amazon Flex interlock device questions answered: background checks, app policies, and whether gig work is possible while on an IID.

DUI on Federal Property or Military Base: How Federal Jurisdiction Changes the Process

Facing a DUI federal property charge. Learn how jurisdiction, federal vs state law, penalties, and military rules differ so you can understand your options.

DMV vs Court: When Your DUI Hearing Results Don’t Match

DMV vs court after a DUI can lead to different outcomes. Learn how license hearings and criminal DUI cases differ, key deadlines, and what steps to take.

What Happens at a DUI Evaluation? The Assessment Process Explained

Learn what happens in a DUI evaluation, what to bring, questions to expect, and how your answers influence court sentencing, treatment, and interlock time.

DUI Counseling and Mandatory Alcohol Education: What to Expect

Learn what DUI counseling involves, when courts order it, and how programs work. Discover typical requirements, completion certificates, and compliance steps.

Ignition Interlock Tampering Detection: How Devices Catch Bypass Attempts

Ignition interlock tampering detection bypass: how modern devices detect tampering, the penalties involved, and why bypass attempts always fail.

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