A double triple endorsement is not a single endorsement—it's two separate endorsements stacked on one CDL

A double triple endorsement means a commercial driver holds both a Double (DD) endorsement and a Triple (T) endorsement on the same license. These endorsements allow a driver to operate specific combinations of trailers. The Double endorsement permits towing two trailers; the Triple endorsement permits towing three trailers. A driver with both endorsements can legally pull either combination, depending on what the job requires.

This is different from holding just one endorsement. A driver with only a Double endorsement cannot legally operate a triple-trailer rig, even if they have the skill. A driver with only a Triple endorsement can pull three trailers but may not be permitted to pull two under certain state or company rules. The double triple endorsement removes that restriction and gives the driver maximum flexibility on the road.

Key Takeaways

  • A double triple endorsement is two separate endorsements (DD and T) on one CDL, not a single combined endorsement.
  • The Double endorsement allows towing two trailers; the Triple endorsement allows towing three trailers.
  • Drivers must pass separate written tests for each endorsement to add both to their license.
  • Not all states offer the Triple endorsement, and some states restrict where triple-trailer rigs can operate.
  • Employers often require the double triple endorsement for drivers who work in long-haul or specialized freight operations.

Why employers want drivers with both endorsements

Trucking companies that haul freight across multiple states often need drivers who can operate both double and triple combinations. A driver assigned to one job might pull two trailers; the next week, the same driver might pull three. Without both endorsements, the company would have to reassign the driver or hire someone else, which costs time and money.

Long-haul operations, agricultural freight, and automotive transport are common industries where double triple endorsements are standard. Some companies list it as a requirement in the job posting; others will hire a driver with a single endorsement and pay for training and testing to add the second one. Either way, holding both endorsements makes a driver more marketable and often leads to higher pay.

How to add both endorsements to your CDL

You must pass a separate written test for each endorsement. Your state's Department of Motor Vehicles (DMV) or equivalent agency administers these tests. You can take them on the same day or on different days—there is no rule requiring you to space them out.

Before you test, study the Commercial Driver's License Manual for your state, focusing on the sections covering doubles and triples. These sections cover vehicle dimensions, weight limits, coupling and uncoupling procedures, and safe braking practices specific to multi-trailer rigs. The tests are multiple-choice and typically 20 questions each, with a passing score of 80 percent.

You do not need to pass a skills test (the road test) again if you already hold a CDL. The written tests alone are sufficient to add the endorsements. However, some states or employers may require you to demonstrate coupling and uncoupling skills during a practical evaluation before you can operate the rig on the job.

State differences in double and triple endorsements

Not all states offer the Triple endorsement. Some states restrict triple-trailer operations to certain highways or regions, or prohibit them entirely. Before you pursue a triple endorsement, check your state's CDL handbook or contact your DMV to confirm that the endorsement is available and what restrictions explore.

States that do allow triples often have rules about where the rigs can operate. For example, some states permit triples only on interstate highways, not on state routes or local roads. Others limit triple operations to specific corridors or require special permits. If you plan to work across state lines, you will need to understand the rules in each state where you will drive.

Your CDL is valid in all states, but the endorsements are subject to the laws of the state where you are driving. A triple endorsement from your home state does not override a neighboring state's ban on triple-trailer rigs.

Cost and timeline for adding endorsements

The cost of the written tests varies by state, typically ranging from $10 to $50 per test. Some states charge a flat fee to add any endorsement; others charge per endorsement. Contact your DMV to confirm the exact fee for your state.

The timeline is usually quick. If you pass both tests on the same day, your updated license may be issued the same day or within a few days, depending on whether your state issues licenses on-site or by mail. If you fail a test, most states allow you to retake it after a waiting period of a few days to a week.

If your employer is paying for the training and testing, ask them whether they cover the test fees and whether they require you to pass before your first day on the job or within a certain window after hiring.

What the endorsement codes look like on your license

Your CDL will show endorsement codes in a specific section, usually labeled "Endorsements" or "Restrictions." The Double endorsement is typically coded as DD and the Triple endorsement as T. If you hold both, your license will display both codes side by side or in a list.

Some states also use different notation. For example, some may print "Doubles" and "Triples" in full text rather than abbreviations. Check your license after it is issued to confirm both endorsements are listed. If one is missing, contact your DMV when ready to have it corrected.

Frequently Asked Questions

Can I get a double triple endorsement without already having a CDL?

No. You must hold a valid CDL before you can add endorsements. If you do not yet have a CDL, you will need to pass the general knowledge test, the air brakes test (if applicable), and the skills test first. Once you have your CDL, you can then test for the Double and Triple endorsements.

Do I need a skills test to add the double triple endorsement?

No. The written tests are sufficient in most states. However, some employers require a practical evaluation of your coupling and uncoupling skills before you operate the rig on the job, even though the state does not mandate it. Ask your employer what they require before you test.

What happens if I fail one of the endorsement tests?

You can retake the failed test after a waiting period set by your state, usually a few days to a week. You do not lose your existing CDL or endorsements. You can also retake the other endorsement test while you wait to retake the failed one.

Can I drive a double or triple rig before my endorsement is officially on my license?

No. You must have the endorsement printed on your license before you operate the rig. Driving without the proper endorsement is a violation and can result in fines, points on your record, and potential job loss. Wait until your updated license arrives before you begin the job.

Do I need a double triple endorsement to work in all trucking jobs?

No. Many trucking jobs require only a standard CDL or a single endorsement like Hazmat or Tanker. The double triple endorsement is specific to jobs that involve towing multiple trailers. Check the job posting or ask the employer what endorsements they require.