Required
Global Banner
Ignition Interlock Support in Greensboro & Winston-Salem

North Carolina Ignition Interlock Lawyer

McMinn, Fradin, Gray & Logan Favicon
Reviewed by McMinn, Fradin, Gray & Logan

What is an Ignition Interlock Device?

Established as a highway safety initiative in 1989, the North Carolina Division of Motor Vehicles (NCDMV) created the State of North Carolina Ignition Interlock Program. The objective of the Program is to hold drivers convicted of DWI accountable and to promote public safety.

However, the program seems to have been turned on its head. It has become much more of a method of putting restrictions on people who are otherwise safe in our community. The device is a safety device and not a measuring instrument, but the Division of Motor Vehicles has begun to consider it an instrument to prove alcohol consumption. That is not what it was designed for, and not its function. To learn more about this device, contact a North Carolina ignition interlock lawyer from our firm. The skilled DWI attorneys at McMinn, Fradin, Gray & Logan are here to help.

Get a Free Consultation

Our Team of Attorneys

Professional headshot of James R. McMinn
James R. McMinn
Michael Fradin professional portrait photo
Michael Fradin
Headshot of Derek M. Gray
Derek M. Gray
Headshot of Daniel N. Logan, professional profile photo
Daniel N. Logan
talk to a lawyer
Ignition interlock device in car showing how breathalyzer technology prevents drunk driving.

How does an Ignition Interlock Device work?

An ignition interlock is a device that prevents a vehicle from starting if it detects a multitude of different substances in the person’s breath. While it is intended to prevent the car from operating if the person has been drinking, the device cannot discern contaminants from alcohol consumption. The device works in a similar way to a breathalyzer, but it does not have an infrared sensor to distinguish contaminants from actual alcohol consumption so it is riddled with false positives.

Many people, the North Carolina Division of Motor Vehicles hearing, officers included, believe that the device measures the amount of alcohol on the driver’s breath, then the interlock temporarily locks the vehicle’s ignition. The problem is that it is not an accurate measuring device, and was never designed to be one. Rather, it is a safety device that gives false positives, but therefore “protects” our roads. It is not a measuring instrument and is not accurate. Our North Carolina attorneys understand this and can apply this knowledge to your ignition interlock case.

Client Reviews
All Reviews talk to a lawyer

Ignition Interlock Rolling Retests

An additional safety feature our North Carolina attorneys recognize in ignition interlock devices is rolling retests. At periodic times, while driving, the device will prompt another breath test from the driver. The driver has about 5 minutes to pull over and take the breath test. If the device detects alcohol, or the driver refuses to take the retest, it will record a failed test and it will honk the horn until the vehicle is turned off. It’s important to note that an ignition interlock device will never turn off the vehicle while it’s in use.

What’s the Benefit of an Ignition Interlock Device?

The benefit of the device is that it gives a driver a chance to drive when they are safe to drive, and thus, remain productive members of our community. Because North Carolina does not have an adequate public transit system, being able to drive is almost mandatory to be able to maintain a job, even in the heart of a larger city like Greensboro or Winston-Salem. Even with the costs and inconvenience of using an Ignition Interlock, it can be a huge benefit in maintaining employment. The bad side is the devices are unreliable and are prone to false positives caused by mouth contaminants. During your initial consultation, our ignition interlock attorneys in North Carolina can further explain the benefits and disadvantages of such devices.

Who May be Required to Get an Ignition Interlock Device?

There are two fundamentally different ways that you may be required to install an ignition interlock. The most common reason for an Interlock is when a person is placed under an Alcohol Content Restriction (ACR) after blowing .15 or higher (or blood results) in a DWI conviction. In many cases, the limited driving privilege will be granted; however, you may also be required to install an ignition interlock device even if you do not get limited driving privileges for the first year and wait out the suspension.

The second fundamental way you could be required to install an ignition interlock is when you receive a Conditional Restoration of your driving privilege after multiple DWIs. This Conditional Restoration is a type of probation and has different restrictions, protocols, violation rules, and appeal procedures than the ACR. Too many attorneys who otherwise are good DWI lawyers, do not fundamentally understand this area of administrative law and procedure. No matter where your DWI was in North Carolina, make certain that your ignition interlock attorney is well-versed in the actual subtle differences before hiring them.

Interlock devices are required for drivers:

  • Who blow over .15 during a DWI arrest
  • Under conditional license restoration following suspension.
  • Whose commercial license has been revoked

Although North Carolina does not yet require the ignition interlock device in every DWI case, it is important for people to take it seriously. The state is serious about keeping our roads safe, and it is likely to make it mandatory for every DWI like 14 other states already have.

Our Offices in North Carolina

McMinn, Fradin, Gray & Logan
1133 West 1st St
Winston-Salem, NC 27101
Get Directions
McMinn, Fradin, Gray & Logan
1043 Burke St
Winston-Salem, NC 27101
Get Directions
McMinn, Fradin, Gray & Logan
328 E Market St Ste 120
Greensboro, NC 27401
Get Directions

Where Do I Get an Ignition Interlock Device and Which Company Should I Use?

There are four Interlock providers in North Carolina.

Monitech, Inc.: 1-800-521-4246

Monitech is a North Carolina company that pioneered the interlock use here in North Carolina. Clarke Dummit has been doing hearings involving Monitech employees and logs for more than a decade. Our firm’s experience has been fairly positive with Monitech, and they have more recently been getting better, more up-to-date equipment. They are still slow to get us the records we need to represent you in any violation hearing.

Smart Start, Inc.: 1-800-880-3394

Smart Start is a national company that started providing interlock services in North Carolina a few years back. They provide a strong network and infrastructure, and they have been very responsive to our North Carolina attorney’s requests for logs and statements about the ignition interlock device when we fight violation hearings.

We prefer to get the logs via email and digitally so that our team can sort and evaluate the history of the logs efficiently.

Alcolock NC, Inc.: 1-855-664-0353

Alcolock is a new provider in North Carolina with locations in Winston-Salem and Greensboro. They strive to provide clients with the lowest-cost and most efficient ignition interlock program. Contact them today to schedule an installation appointment.

Intoxalock, Inc.: 1-844-677-9243

Intoxalock was recently approved by the NCDHHS as a provider for interlock devices. They offer a simple-to-use, one-button device with an easy blow pattern for testing. Intoxalock allows you to pay online, via their app, or by check. Reach out to one of their state specialists to assist you in getting set up with an ignition interlock device.

What Happens If I Fail an Ignition Interlock Test?

If a failed test occurs, the vehicle will not start and the providers are required to send notice of the failed tests to the DMV. The DMV then will issue a Notice of Suspension to the driver with an effective date on it. The suspension date is normally 10 days from the time the notice is mailed from the DMV. A hearing is allowed but MUST be requested in writing and postmarked before the day the suspension is set to begin.

Do I Need an Attorney For an Interlock Violation Hearing?

It is not required, but going in without an experienced Ignition Interlock attorney in North Carolina is foolish. You will not be notified of what violation the DMV is alleging. You will not have logs prepared. You will be ambushed with whatever the DMV hearing Officer chooses to ask about any dates. You need an experienced Attorney every time you go to court.

How Expensive is an Interlock Device?

The offender must pay all costs associated with the ignition interlock. The cost varies by state, but MADD estimates it costs approximately $70 to $150 to install and around $60 to $80 per month for device monitoring and calibration. If you have questions about the costs or process involved in using this device, schedule a consultation with a North Carolina ignition interlock lawyer at McMinn, Fradin, Gray & Logan.

Need legal guidance? Our team is ready to help.
(336) 485-4907 talk to a lawyer
Contact Us
Have questions or need legal guidance?
Get in touch, our team is ready to help.

Contact Us

Copyright © McMinn, Fradin, Gray & Logan 2026. All Rights Reserved.