A Rhode Island ignition interlock device is a court-mandated breathalyzer wired into your vehicle. It prevents the car from starting if the device detects alcohol on your breath. After certain DUI convictions in Rhode Island, the interlock is required for a defined period after license reinstatement. Tampering with it, missing rolling retests, or testing positive while driving have their own legal consequences.
This page explains when the Rhode Island ignition interlock is required, what it costs, how it works, and what to do when something goes wrong. Call 401-573-2265 for a free consultation.
When Rhode Island requires ignition interlock
Rhode Island General Laws section 31-27-2.8 makes ignition interlock mandatory in these situations:
- Second offense DUI conviction
- Third offense DUI conviction
- First offense DUI with BAC of 0.15 or higher
- Any DUI with child passenger enhancement
- Hardship license issued after a DUI suspension (in many cases)
- Refusal cases with prior DUI history
The required duration ranges from 6 months to 2 years depending on the offense level. Third offense and felony DUI cases can require interlock for the full license period and beyond.
How the Rhode Island ignition interlock device works
The interlock is a handheld breath analyzer installed on the steering column. To start the car you blow into it. If the device detects alcohol over the threshold (typically 0.025 BAC), the car does not start.
While driving, the device runs rolling retests at random intervals - usually 5 to 15 minutes after starting and then every 30 to 60 minutes. You have to pull over (or have a passenger blow) within a set time or the device records a violation.
The device stores:
- Every breath test result with time and date
- Every missed or skipped test
- Every failed test
- Every time the car was started or stopped
- Tampering attempts (disconnection, power loss, modification)
The data downloads at every monthly service appointment and gets reported to the Rhode Island DMV.
Cost of the Rhode Island ignition interlock
Interlock costs are paid by the driver. Approximate Rhode Island pricing:
- Installation: $75 to $150
- Monthly monitoring and calibration: $70 to $90 per month
- Removal: $50 to $75
For a 1-year interlock period, total cost runs $900 to $1,200. For a 2-year period, $1,800 to $2,400. The state does not subsidize the cost. A hardship reduction is available for indigent defendants but the process requires court approval.
Approved Rhode Island interlock vendors
Rhode Island maintains a list of approved vendors. The DMV does not allow installation by non-approved providers. Common vendors operating in RI include Smart Start, Intoxalock, LifeSafer, and Draeger. Vendors have installation locations across the state in Providence, Cranston, Warwick, Pawtucket, East Providence, and other towns.
You choose the vendor. Price differences are small but service quality varies. Read reviews before picking.
Common interlock violations and what they mean
Failed initial test. You blew over 0.025 trying to start the car. Common causes: recent mouthwash, certain medications, food fermentation, cold medicine. The device locks for a few minutes then lets you retry.
Failed rolling retest. Alcohol detected while driving. This is more serious because it suggests drinking after starting.
Missed rolling retest. You did not blow within the required window. This often happens when the device prompts during a phone call or while distracted.
Tampering detection. Disconnecting power, removing the device, or trying to fool it with compressed air or other tricks.
Skipped service appointment. You did not get the monthly calibration done on schedule. The device will eventually lock out the vehicle until service is completed.
What happens when a violation is reported
The vendor sends the data to the DMV. The DMV reviews violations and can:
- Extend the interlock period
- Suspend the driving privilege
- Require additional substance abuse treatment
- Refer back to the court for further proceedings
Multiple violations can lead to revocation of the hardship license and a return to a full suspension. Tampering can result in new criminal charges.
Defending against an interlock violation
Interlock violations are challengeable. Defenses include:
False positive readings. Mouthwash, NyQuil, certain breath sprays, sourdough bread, fermented food, asthma inhalers, and other common items can trigger false positives. If you can document the source within the appropriate time window, the violation may be excused.
Device malfunction. Interlock devices can malfunction. A consistent pattern of false readings or device errors can support a defense.
Third party use. If someone else drove your car and triggered the violation, that has to be proven through circumstantial evidence (whereabouts, statements, etc.).
Medical conditions. Acid reflux, GERD, diabetes (ketosis), and other conditions can produce alcohol on the breath without drinking.
Removing the ignition interlock
The interlock comes off when:
- The required time period has passed
- You have completed any required DWI program
- No outstanding violations in the final months of the period
- The DMV authorizes removal
The vendor will not remove the device without DMV authorization. Pull the device early or without authorization and the violations stack up fast.
Interlock for out of state residents
If you live outside Rhode Island and Rhode Island requires interlock as part of your case, the requirement can usually be transferred to a vendor in your home state. The DMV coordinates with your home state DMV. For more on the cross-state process, see our out of state DUI page.
Where interlock issues are handled
Interlock requirements come out of:
- The Rhode Island Traffic Tribunal in Cranston (for refusal-based suspensions)
- The District Court that handled the underlying DUI
- The Rhode Island DMV (for administrative violations and removal)
Free consultation
If you are facing a Rhode Island ignition interlock requirement or you have a violation issue, call 401-573-2265 for a free consultation. The interlock rules are technical and the violations are often defensible.