The abbreviations on your driver's license are state-issued codes that describe what vehicles you can legally drive and any restrictions on your driving
Your driver's license contains several abbreviations that look like random letters but actually carry legal weight. The most important ones are the class codes — usually a single letter like D, C, or M — that tell police and insurance companies what category of vehicle you're licensed to operate. Below that, you'll find restriction codes, which are usually two letters that describe limitations on your driving, like corrective lenses required or automatic transmission only. Every state uses its own system, so a code that means one thing in California means something different in Texas.
Understanding these codes matters because driving a vehicle outside your licensed class can result in a ticket, even if you're a safe driver. Insurance companies also use them to calculate your premium. If you're unsure what your codes mean, your state's Department of Motor Vehicles website has a decoder, or you can ask at your local DMV office.
Key Takeaways
- The letter or number in the "Class" field shows what type of vehicle you're legally permitted to drive — passenger cars, motorcycles, commercial trucks, or combinations of these.
- Restriction codes (usually two letters) appear below the class and describe conditions you must follow, such as wearing glasses or driving only automatic vehicles.
- Every state has its own abbreviation system, so the same code means different things depending on which state issued your license.
- Driving outside your licensed class or violating a restriction can result in a traffic violation, even if you caused no accident.
What the vehicle class codes mean
The class code is the single most important abbreviation on your license. It appears in a box labeled "Class" and tells you what you're legally allowed to drive. Most states use letters (A, B, C, D, M) but some use numbers, and the definitions vary by state.
In most states, Class D means a regular passenger car or light truck — the most common license type. Class M or Class A (depending on the state) means you can operate a motorcycle. Class B or Class C usually refers to larger vehicles like buses or commercial trucks, and these require additional testing and often a separate endorsement. If your license shows a class you don't recognize, your state's DMV website has a full chart. Some states print the class name in words instead of a code, which makes it clearer but less common.
The class code matters because it's legally binding. If you're licensed only for Class D and you drive a commercial truck, you can be cited even if you drove perfectly. Insurance companies also check this code — if you cause an accident while driving a vehicle outside your class, your claim may be denied.
Common restriction codes and what they require
Restriction codes appear below the class and are usually two letters. They describe conditions you must follow while driving. The most common restriction is B (or sometimes 01), which means you must wear corrective lenses — glasses or contacts — whenever you drive. If you have this restriction and you're stopped without your glasses, you can receive a citation.
Automatic transmission only (often coded as A or 32) means you can only drive vehicles with automatic transmissions, not manual. This restriction is usually issued after an eye exam shows limited peripheral vision or after a driving test in an automatic vehicle. Daylight driving only (often D or 08) means you cannot drive between sunset and sunrise, a restriction sometimes given to older drivers or those with certain vision conditions.
Other common restrictions include no freeway driving, right mirror required, left foot accelerator, and hand controls required. Each state has its own codes, so the two-letter combination on your license may not match another state's system. If you see a restriction you don't understand, contact your DMV — they can explain what it means and whether you can request its removal.
Endorsements versus restrictions
Endorsements and restrictions are different things, and it's important not to confuse them. A restriction is a limitation — something you cannot do. An endorsement is a permission — something you are allowed to do that most drivers are not. Endorsements appear on your license as additional codes and usually require extra testing or training.
For example, if you want to drive a motorcycle, you need a motorcycle endorsement (often M or H), which requires passing a separate written test and riding skills test. If you want to drive a commercial truck, you need a commercial driver's license (CDL) with the appropriate class and endorsements. Endorsements are additions to your base license; restrictions are limitations on it. Your DMV can tell you which endorsements are available in your state and what's required to obtain them.
How states differ in their abbreviation systems
There is no national standard for driver's license codes, so each state has designed its own system. California uses letters for class (A, B, C, D, M) and numbers for restrictions (01, 02, 03). New York uses numbers for class (1, 2, 3, 4, 5) and letters for restrictions (A, B, C). Texas uses letters for both. This means your license is only valid as written in the state that issued it, and if you move or travel, you may need to look up what your codes mean in a different state's system.
When you move to a new state, you'll eventually need to exchange your out-of-state license for one issued by your new state. The new license will use that state's abbreviation system, so the codes will look completely different even though your driving privileges may be the same. If you're traveling and need to know what your codes mean in another state, that state's DMV website has a decoder or you can call their customer service line.
What to do if you don't recognize a code on your license
If you see an abbreviation on your license that you don't understand, the fastest way to find out what it means is to visit your state's Department of Motor Vehicles website. Most states have a page titled "License Codes" or "Driver's License Abbreviations" with a full chart. If the website doesn't have it, you can call your local DMV office or visit in person — staff can explain any code in minutes.
If you believe a restriction on your license is no longer necessary — for example, you had corrective lenses restriction but now have vision correction surgery — you can request a hearing to have it removed. This usually requires a vision test or medical documentation. Contact your DMV to ask what evidence they need and how to schedule the hearing. Removing a restriction doesn't change your insurance or driving record; it straightforward updates your license to reflect your current situation.
Frequently Asked Questions
Can I drive a vehicle outside my licensed class?
No. Driving a vehicle outside your licensed class is a traffic violation, even if you're a safe driver and caused no accident. For example, if your license is Class D (passenger vehicles only) and you drive a commercial truck, you can be cited. You would need to obtain the appropriate class or endorsement through your state's DMV.
Do I need to remove a restriction before I can drive?
It depends on the restriction. If you have a restriction like corrective lenses required, you must follow it every time you drive. If you believe the restriction no longer applies to you, contact your DMV about the process to have it removed — usually this requires a vision test or medical exam.
What happens if I'm stopped without my glasses and I have a corrective lenses restriction?
You can receive a citation for violating your license restriction. This is separate from any ticket for unsafe driving. To avoid this, always carry your corrective lenses when you drive if your license requires them.
Will my out-of-state license codes mean the same thing in another state?
No. Each state has its own abbreviation system, so a code on your California license means something different on a Texas license. If you're traveling and need to know what your codes mean in another state, check that state's DMV website for their code chart.
How do I get a motorcycle endorsement added to my license?
Contact your state's DMV to learn the requirements — most states require a written test about motorcycle safety and a riding skills test. Some states offer a waiver if you complete an approved motorcycle safety course. Requirements vary by state, so check your DMV's website or call for details.