What Double and Triple Endorsements Mean

A double endorsement means you are licensed to haul two trailers behind a single tractor. A triple endorsement means you can haul three trailers. These are not separate licenses — they are additions to your existing Class A CDL that expand what you are legally permitted to pull.

The endorsement itself appears on your CDL card. To get it, you must pass a written test specific to doubles or triples, and in most states, you must also pass a skills test (the road test) while actually operating a double or triple rig. You cannot straightforward study and test — you have to demonstrate that you can handle the vehicle safely.

Not all states allow triples on public roads, and some states restrict where you can operate them. Before you pursue either endorsement, check your state's rules about where doubles and triples are legal in your area.

Key Takeaways

  • Double and triple endorsements require both a written test and a hands-on skills test in an actual double or triple rig.
  • You must already hold a valid Class A CDL before you can test for either endorsement.
  • Some states do not permit triples on public roads, so confirm your state's rules before investing time and money in training.
  • You will need access to a double or triple rig for the skills test, which usually means working with a trucking company or training school that owns the equipment.
  • The written test covers vehicle control, weight distribution, coupling and uncoupling procedures, and safe operation specific to multi-trailer rigs.

The Written Test for Doubles and Triples

The written test is the same whether you are pursuing a double or triple endorsement — you take one test per endorsement you want. The test covers how to couple and uncouple trailers, how weight shifts in a multi-trailer rig, how to brake safely with multiple trailers, and how to maneuver in tight spaces.

You will answer questions about what to do if a trailer starts to jackknife, how to inspect a double or triple rig before driving, and how to handle emergency situations. The test is usually 20 questions, and you must pass with a score of 80 percent or higher. Most states allow you to take the test at the same location where you took your Class A CDL written test.

Study materials are available through your state's DMV website, and many CDL training schools provide practice tests. You can take the written test without owning or having access to a double or triple rig — the skills test is where you need the actual vehicle.

The Skills Test in a Double or Triple Rig

The skills test is the harder part. You must perform the test in an actual double or triple rig, which means you need access to one. If you do not work for a trucking company that owns doubles or triples, you will need to arrange this through a CDL training school or find a company willing to let you use their equipment for testing.

The test has three parts: the pre-trip inspection, the basic control skills, and the road test. In the pre-trip, you walk around the rig and point out safety items to the examiner — lights, brakes, coupling mechanisms, tire condition, and more. You must know where everything is and what to check.

In the basic control skills portion, you perform maneuvers in a closed course: backing in a straight line, backing into an offset alley, and performing a 90-degree turn. These are harder in a double or triple because the rig is longer and the trailers do not follow the same path as the tractor. The examiner is watching for smooth steering inputs, proper use of mirrors, and awareness of the rig's length and width.

The road test is 30 to 50 minutes of actual driving on public roads. The examiner watches how you accelerate, brake, turn, merge, and handle traffic. They are assessing whether you can safely operate a multi-trailer rig in real conditions.

Getting Access to a Double or Triple Rig for Testing

This is often the biggest hurdle. Most owner-operators and small trucking companies do not have doubles or triples, so you cannot straightforward borrow a rig from your current employer. Your options are a CDL training school, a large trucking company with a training program, or a company that specializes in endorsement testing.

CDL training schools that offer doubles and triples training will let you use their rig for the skills test as part of your training package. This usually costs between $500 and $2,000 depending on how much instruction you receive. Some schools offer just the test vehicle and examiner coordination; others include classroom instruction and multiple practice runs.

Some large trucking companies — particularly those that operate doubles or triples regularly — have in-house training programs. If you work for one of these companies, ask whether they will train you and let you test in their equipment. Some will cover the cost as part of your employment.

A few states have third-party testing facilities or partnerships with training schools where you can rent a rig specifically for the test. Contact your state's CDL program office to ask whether this option exists in your area.

The Order: Written Test First, Then Skills Test

You must pass the written test before you schedule the skills test. Once you pass the written test, your CDL record is updated to show that you have passed the knowledge test for that endorsement, but the endorsement does not appear on your card until you also pass the skills test.

After you pass both the written and skills tests, the endorsement is added to your CDL. The whole process — from studying to final endorsement — typically takes two to four weeks if you already have access to a rig, or four to eight weeks if you need to arrange training and testing through a school.

You can pursue a double endorsement first and then a triple endorsement later, or you can test for both if you want. Many drivers get the double endorsement first because doubles are more common and easier to operate, then add the triple endorsement once they have experience.

State Variations and Restrictions

Not every state permits triple trailers on public roads. Some states allow them only on certain highways or in certain regions. A few states do not allow triples at all. Before you spend money on training and testing, check your state's CDL handbook or contact your state's DMV to confirm whether triples are legal where you live and work.

Some states also have restrictions on double endorsements — for example, requiring a minimum age or a certain amount of driving experience before you can test. A few states require additional testing or training beyond the standard written and skills tests.

If you plan to drive in multiple states, check the rules in each state where you expect to work. A triple endorsement issued in one state is valid in all states, but some states may restrict how you can use it within their borders.

Frequently Asked Questions

Can I get a double or triple endorsement if I just got my Class A CDL?

Yes, there is no waiting period. As soon as your Class A CDL is valid, you can test for a double or triple endorsement. However, you will need access to the appropriate rig for the skills test, which may take time to arrange.

What happens if I fail the skills test?

You can retake it. Most states let you retake the skills test after a short waiting period — usually a few days to a week. You will need to pay the testing fee again and arrange access to the rig again. The written test result stays on your record, so you do not have to retake that part.

Do I need a separate medical certificate for doubles or triples?

No. Your Class A CDL medical certificate covers all endorsements. You do not need additional medical testing to add a double or triple endorsement.

Can I test for both double and triple endorsements at the same time?

You can take both written tests on the same day, but you will need to schedule separate skills tests because they are performed in different vehicles. Most testing facilities will let you do both skills tests in one visit if you arrange it in advance.

What if my state does not allow triples?

You can still get the endorsement on your CDL, but you cannot legally operate a triple rig in that state. Some drivers get the endorsement so they can work in other states that do allow triples. Check with your state's DMV about whether this is permitted.