Restriction codes are letters or numbers printed on your driver's license that limit how and when you can drive
A restriction code is a letter or number on your driver's license that tells law enforcement and licensing officials you can only drive under certain conditions. The code itself — usually a single letter like "B" or "D" — is shorthand for a longer rule. For example, code "B" typically means you must wear corrective lenses while driving. Code "D" often means you cannot drive a commercial vehicle. The exact meaning of each code varies by state, so a restriction that means one thing in California may mean something different in Texas.
Restrictions are placed on your license during the issuance or renewal process, usually because of a medical condition, a conviction, or a requirement of the law in your state. They stay on your license until you meet the conditions to have them removed — which might mean passing a vision test, completing a course, or waiting out a suspension period. Ignoring a restriction and driving outside its limits can result in a ticket, fines, and points on your driving record.
Key Takeaways
- Restriction codes are state-specific, so you must check your state's DMV handbook to learn what each code on your license means.
- Common restrictions include corrective lenses, automatic transmission only, and prohibitions on driving at night or on highways.
- Restrictions are placed on your license during issuance or renewal and remain until you meet the conditions to remove them.
- Driving outside the limits of your restriction can result in a ticket and points on your record, even if you are otherwise a safe driver.
- You can request removal of a restriction by contacting your state DMV and providing proof that the reason for the restriction no longer applies.
How states assign restriction codes to your license
When you explore for a driver's license or renew one, the DMV reviews your medical history, driving record, and test results. If you fail a vision test but can pass it with glasses, the examiner will add a corrective lens restriction. If you have a medical condition that affects your ability to drive — such as epilepsy or a hearing impairment — the DMV may add restrictions based on your doctor's report. Some states require a medical evaluation form signed by your physician before they will issue a license with restrictions.
Restrictions can also result from a conviction. If you are convicted of driving under the influence, many states will add a restriction requiring an ignition interlock device — a breathalyzer installed in your vehicle that prevents the engine from starting if alcohol is detected. Other convictions, such as reckless driving, may result in restrictions on highway driving or nighttime driving for a set period.
The DMV prints the restriction code on the back of your physical license card and also records it in the state's licensing database. When a police officer runs your license during a traffic stop, the restriction code appears on their screen. If you are driving outside the limits of your restriction, the officer can cite you for violating the restriction, separate from any other violation.
Common restriction codes and what they mean
The most frequent restriction is corrective lenses — usually code "B" or similar — which means you must wear glasses or contact lenses while driving. This restriction is placed when you pass the vision test only with correction. You cannot legally drive without your lenses, even for a short trip, and doing so is a violation.
Automatic transmission only — often code "D" or "10" — means you cannot drive a manual transmission vehicle. This restriction is sometimes placed after an injury or medical condition that affects your ability to operate a clutch. Ignition interlock restrictions require you to use a device that tests your breath before allowing the engine to start; these are common after DUI convictions and may be required for months or years depending on your state and the severity of the offense.
Nighttime driving restrictions — sometimes code "N" — prohibit you from driving between sunset and sunrise or during specific hours set by your state. These are often placed on young drivers or drivers with certain medical conditions. Highway restrictions prevent you from driving on interstate highways or limited-access roads. Some states use a restriction code for vehicles with hand controls only, meaning you must use a vehicle equipped with hand-operated brakes and accelerators.
Not all states use the same codes for the same restrictions. Your state's DMV handbook lists every code used in your state and its meaning. You can find this handbook on your state's DMV website or request a printed copy at a DMV office.
How to find out what your restriction codes mean
The first step is to look at your physical driver's license. Restrictions are printed on the back, usually in a section labeled "Restrictions" or "Conditions." The code will be a letter or number, sometimes followed by a brief description. If the description is unclear or missing, your state's DMV handbook contains the full definition of every code.
You can read your state's DMV handbook from the official DMV website — search "[your state] DMV driver handbook" — or pick up a printed copy at any DMV office. The handbook includes a table that lists every restriction code, what it means, and what you must do to comply. Some states also allow you to look up your license information online through a DMV portal, which may display your restrictions in plain language.
If you are unsure whether a restriction applies to a specific situation — for example, whether you can drive on a particular road — contact your state DMV directly. You can call the DMV customer service line, visit a local office, or use the online chat feature if your state offers one. Having your license number ready will help the DMV staff answer your question quickly.
Removing or modifying a restriction on your license
The process for removing a restriction depends on why it was placed on your license. If the restriction is based on a medical condition, you will typically need to provide a letter or form from your doctor stating that the condition has improved or resolved. For a vision restriction, you may need to pass a new vision test at the DMV. For a hearing restriction, you may need an audiologist's report.
If the restriction is based on a conviction — such as an ignition interlock requirement after a DUI — you must wait out the required period and then request removal. Some states allow removal before the period ends if you meet certain conditions, such as completing a substance abuse program. Check your state's DMV website or call the DMV to learn the exact requirements for your situation.
To request removal, contact your state DMV and ask what documents you need to provide. You may be able to submit documents by mail, in person, or through an online portal. The DMV will review your submission and either remove the restriction, modify it, or request additional information. Processing times vary by state but typically take two to four weeks.
What happens if you drive outside your restrictions
Driving outside the limits of your restriction is a traffic violation. If a police officer stops you and discovers you violated a restriction — for example, driving without your required corrective lenses or driving at night when your license restricts nighttime driving — you can be cited for the violation. The citation will appear on your driving record and may result in fines, points, or both, depending on your state.
A restriction violation can also affect your insurance rates and your ability to renew your license. If you accumulate too many points from violations, your license may be suspended. Additionally, if you are involved in an accident while driving outside your restrictions, your insurance company may deny your claim or reduce your coverage, because you were not following the terms of your license.
If you receive a citation for violating a restriction, you have the right to contest it in traffic court. You can argue that you did not violate the restriction, that the restriction was placed in error, or that you have since met the conditions to remove it. Bringing documentation — such as a new vision test result or a doctor's letter — can strengthen your case.
Restrictions for young and new drivers
Many states place automatic restrictions on young drivers or those with a learner's permit or intermediate license. These restrictions may include prohibitions on nighttime driving, limits on the number of passengers, and requirements to use a hands-free device for phone calls. These restrictions are designed to reduce crash risk during the early years of driving.
The restrictions typically expire when you reach a certain age — often 18 or 21 — or after you hold your intermediate license for a set period, usually six months to one year. You do not need to request removal; the DMV will automatically remove these restrictions when you become may be able to access. However, you should check your license after the expiration date to confirm the restrictions have been removed.
If you are unsure whether your restrictions have been removed, you can check your license or contact your state DMV. Some states allow you to check your license status online, which will show your current restrictions.
Frequently Asked Questions
Can I drive if I forgot my glasses and have a corrective lens restriction?
No. A corrective lens restriction means you must wear your glasses or contact lenses every time you drive. Driving without them is a violation, even if you can see well enough to drive safely. If you are stopped by police, you can be cited for violating the restriction.
What does it mean if my license has a code I do not recognize?
Check your state's DMV handbook, which lists all restriction codes and their meanings. If you still cannot find the code, contact your state DMV directly — they can tell you what the code means and what you must do to comply with it.
How long does it take to remove a restriction?
Processing times vary by state, but most DMVs take two to four weeks to review your request and remove a restriction. Some states process requests faster if you submit documents in person at a DMV office. Contact your state DMV to learn the typical timeline for your situation.
If I have a nighttime driving restriction, can I drive home from work if my shift ends after dark?
That depends on your state's definition of the restriction. Some states allow driving home from work or school even during restricted hours. Others do not. Check your state's DMV handbook or contact the DMV to learn whether your specific situation is covered by an exception.
Will a restriction violation affect my insurance rates?
Yes. A restriction violation is a traffic violation that appears on your driving record. Your insurance company will see it and may increase your rates or drop your coverage. If you are involved in an accident while violating a restriction, your insurance company may deny your claim.