# Double

This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice..

This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 questions correctly. Each question has four possible answer choices. Test questions come from the Colorado Commercial Driver License Manual. Questions come from chapters covering: Driving Safely, Air Brakes (if applicable), Combination Vehicles and Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.

Number of Question
Passing Score

### 8. When entering traffic, the driver of a double or triple needs to be aware that doubles and triples:

Explanation
Doubles and triples need more space than other vehicles, both because they are longer and because their size and weight prevent them from turning or stopping suddenly. When driving a double or triple, always make sure you have enough space before entering traffic, crossing traffic, or changing lanes.

### 9. During an applied leakage test, the maximum leakage rate for a triple combination vehicle is:

Explanation
It is important to know the maximum air loss rate that is safe for your specific vehicle. A triple combination should have a leakage rate no higher than 6 psi in a minute during an applied leakage test.

### 10. The air storage tanks:

Explanation
In an air brake system, the air storage tanks hold enough air for brakes to be used several times if the compressor stops working.

### 11. Driving at night is:

Explanation
Driving at night is more dangerous than driving during the day. It is more difficult for drivers to see hazards, the glare of headlights can affect drivers' vision, and there are more fatigued and impaired drivers on the road.

### 12. How should you check your hydraulic brakes?

Explanation
To test hydraulic brakes, you should pump the brake pedal three times, then apply firm pressure to the brake pedal and hold for five seconds. The pedal should not move. If it does, there may be a leak.

### 13. When passing another vehicle, you should:

Explanation
It is always safest to assume that other drivers, bicyclists, and pedestrians don't see you. Be prepared for the possibility that they may suddenly move into your path. It may be safe to lightly tap your horn or flash your lights as you pass.

### 14. Which of the following is most likely to result in hydroplaning?

Explanation
Hydroplaning is most likely to occur on wet roads if tire pressure is low or if tire tread is worn. If there is enough water on the road, hydroplaning can occur at speeds as low as 30 mph.

To obtain a CDL Doubles/Triples endorsement in Colorado, you will need to follow these steps:

1. Meet the eligibility requirements: You must have a valid Colorado CDL and be at least 18 years old to apply for a Doubles/Triples endorsement. However, if you plan to drive interstate, you must be at least 21 years old.

2. Study the Colorado CDL Driver's Manual: You can obtain a copy of the manual from any driver's license office or download it from the Colorado DMV website. Study the sections related to Doubles/Triples vehicles.

3. Schedule a knowledge test appointment: You can schedule an appointment at any Colorado DMV office that offers CDL testing. The fee for the knowledge test is \$2. You will need to bring your current CDL and proof of identity.

4. Pass the knowledge test: The knowledge test consists of 20 multiple-choice questions related to Doubles/Triples vehicles. You must answer at least 16 questions correctly to pass.

5. Pay the endorsement fee: Once you have passed the knowledge test, you will need to pay a \$7 fee for the Doubles/Triples endorsement.

6. Schedule a skills test appointment: After passing the knowledge test and paying the endorsement fee, you will need to schedule a skills test appointment with a third-party tester approved by the Colorado DMV.

7. Pass the skills test: The skills test consists of three parts - pre-trip inspection, basic control skills, and on-road driving. You must pass all three parts to obtain your Doubles/Triples endorsement.

8. Get your new CDL: Once you have passed all tests and paid all fees, you will receive your new CDL with the Doubles/Triples endorsement added to it.

It's important to note that if you fail any portion of the tests, there may be waiting periods before you can retake them. Additionally, if you have any medical conditions that may affect your ability to drive Doubles/Triples vehicles, you may need to provide additional documentation and/or undergo a medical examination before being approved for the endorsement.
To get a CDL Doubles/Triples license in Colorado, you must meet the following requirements:

1. Age: You must be at least 18 years old to apply for a Doubles/Triples endorsement in Colorado. However, if you plan to drive interstate, you must be at least 21 years old.

2. CDL: You must have a valid Colorado CDL to apply for a Doubles/Triples endorsement.

3. Experience: You must have at least one year of experience driving a commercial motor vehicle (CMV) with a Class A CDL before applying for a Doubles/Triples endorsement.

4. Knowledge test: You must pass a knowledge test specific to Doubles/Triples vehicles. This test covers topics such as coupling and uncoupling, inspecting Doubles/Triples vehicles, and safe driving practices.

5. Skills test: You must pass a skills test that includes a pre-trip inspection, basic control skills, and on-road driving in a Doubles/Triples vehicle.

6. Medical requirements: You must meet the medical requirements set by the Federal Motor Carrier Safety Administration (FMCSA) to operate a CMV with a Doubles/Triples endorsement. This may include passing a medical examination and providing proof of any necessary medical exemptions or waivers.

7. Background check: You may be required to undergo a background check as part of the application process.

It's important to note that these requirements are subject to change, and additional requirements may apply depending on your specific situation. Be sure to check with the Colorado DMV for the most up-to-date information on obtaining a CDL Doubles/Triples license.
Yes, you need specific experience before you can obtain a CDL Doubles/Triples endorsement in Colorado. To apply for a Doubles/Triples endorsement, you must have at least one year of experience driving a commercial motor vehicle (CMV) with a Class A CDL.

In addition to the experience requirement, it's a good idea to receive additional training on driving Doubles/Triples vehicles. This can help you become more familiar with the unique handling characteristics of these vehicles and the additional safety precautions that are necessary when driving them.

There are many CDL training programs available that can provide specialized training for driving Doubles/Triples vehicles. These programs typically include classroom instruction as well as hands-on experience driving Doubles/Triples vehicles.

It's also important to note that the Colorado DMV requires you to pass a knowledge test and a skills test specific to driving Doubles/Triples vehicles as part of the endorsement process. These tests cover topics such as coupling and uncoupling, inspecting Doubles/Triples vehicles, and safe driving practices.

Overall, while specific training is not required by law to obtain a CDL Doubles/Triples endorsement in Colorado, it is highly recommended to help ensure that you are prepared for the challenges of driving these vehicles safely and effectively.
Yes, in Colorado, you must pass a written test specific to Doubles/Triples vehicles in order to obtain a CDL Doubles/Triples endorsement. This test covers topics such as:

1. Inspecting doubles/triples
2. Coupling and uncoupling
3. Inspecting air brakes
5. Safe driving practices for doubles/triples

The written test is designed to assess your knowledge of safe driving practices and the unique challenges of operating Doubles/Triples vehicles. You must pass this test with a score of at least 80% to obtain the endorsement.

In addition to the written test, you will also need to pass a skills test that includes a pre-trip inspection, basic control skills, and on-road driving in a Doubles/Triples vehicle. The skills test is designed to assess your ability to safely operate Doubles/Triples vehicles in real-world driving situations.

It's important to note that the requirements for obtaining a CDL Doubles/Triples endorsement can vary by state, so be sure to check with the Colorado DMV for the most up-to-date information on the specific tests and exams required in your state.
In Colorado, the CDL Doubles/Triples endorsement test consists of three parts: a pre-trip inspection, a basic control skills test, and an on-road driving test. Here are the specific skills or maneuvers you need to demonstrate during each part of the test:

1. Pre-trip inspection: You will need to demonstrate your ability to inspect a Doubles/Triples vehicle properly. You will need to identify and explain the following components:

- Coupling devices (fifth wheel, pintle hook)
- Safety chains
- Electrical and air lines
- Tires and wheels
- Brakes
- Suspension system
- Frame and body

2. Basic control skills test: You will need to demonstrate your ability to maneuver a Doubles/Triples vehicle in tight spaces. You will be asked to perform the following maneuvers:

- Straight line backing
- Offset backing
- Parallel parking

3. On-road driving test: You will need to demonstrate your ability to safely operate a Doubles/Triples vehicle on public roads. You will be asked to perform the following maneuvers:

- Starting, stopping, and shifting smoothly
- Making turns at intersections and in traffic
- Changing lanes safely
- Merging onto highways and entering traffic
- Exiting highways and slowing down from highway speeds

During each part of the test, you will be evaluated on your ability to perform these maneuvers safely and effectively. It's important to practice these skills extensively before taking the test to ensure that you are prepared for all aspects of the exam.
No, in Colorado you cannot operate a commercial motor vehicle with double/triple trailers without a CDL Doubles/Triples endorsement. The Federal Motor Carrier Safety Administration (FMCSA) requires drivers to have a CDL Doubles/Triples endorsement to operate commercial motor vehicles with double/triple trailers.

To obtain a CDL Doubles/Triples endorsement, you must pass a written test specific to Doubles/Triples vehicles and a skills test that includes a pre-trip inspection, basic control skills, and on-road driving in a Doubles/Triples vehicle. You must also have a valid CDL and meet the other requirements set forth by the FMCSA.

It's important to note that operating a commercial motor vehicle without the proper endorsements can result in fines, penalties, and other legal consequences. Additionally, driving a Doubles/Triples vehicle requires specialized skills and knowledge, so it's important to obtain the necessary training and endorsement to ensure safety on the road.
In Colorado, you can add the CDL Doubles/Triples endorsement to your existing CDL license. To add the endorsement, you will need to pass a written test specific to Doubles/Triples vehicles and a skills test that includes a pre-trip inspection, basic control skills, and on-road driving in a Doubles/Triples vehicle.

1. Study for the CDL Doubles/Triples endorsement test by reviewing the Colorado CDL Manual and practicing the required skills.

2. Schedule an appointment at a Colorado Division of Motor Vehicles (DMV) office that offers commercial driver licensing services.

3. Bring your current CDL license, proof of identity, and payment for the endorsement fee to the DMV office.

4. Take and pass the written test specific to Doubles/Triples vehicles.

5. Schedule a skills test appointment at a Colorado DMV office that offers commercial driver licensing services.

6. Bring a Doubles/Triples vehicle that meets Colorado's requirements for the skills test.

7. Take and pass the pre-trip inspection, basic control skills, and on-road driving portions of the skills test in a Doubles/Triples vehicle.

Once you have passed both tests, the DMV will add the CDL Doubles/Triples endorsement to your existing CDL license. It's important to note that you must meet all requirements for obtaining a CDL Doubles/Triples endorsement and have a valid CDL license before adding this endorsement.
Yes, drivers with a CDL Doubles/Triples endorsement are subject to certain restrictions and limitations in Colorado.

Here are some of the restrictions and limitations for drivers with a CDL Doubles/Triples endorsement:

1. Vehicle weight limit: Drivers with a CDL Doubles/Triples endorsement cannot exceed a total weight of 80,000 pounds for the combination of vehicles they are operating.

2. Length limit: Drivers with a CDL Doubles/Triples endorsement cannot exceed a total length limit of 65 feet for the combination of vehicles they are operating.

3. Interstate travel: Drivers with a CDL Doubles/Triples endorsement can only operate Double/Triple trailers in interstate commerce if the state has authorized the operation of Double/Triple trailers.

4. Endorsement renewal: The CDL Doubles/Triples endorsement is valid for the same period as your Colorado CDL license and must be renewed at the same time as your license.

5. Training requirements: Drivers with a CDL Doubles/Triples endorsement are subject to training requirements that include both classroom instruction and behind-the-wheel training in Double/Triple trailers.

It's important to note that drivers with a CDL Doubles/Triples endorsement must comply with all federal and state regulations regarding commercial motor vehicle operation and safety. Violating these regulations can result in fines, penalties, or even suspension or revocation of your CDL license.
In Colorado, drivers with a CDL Doubles/Triples endorsement are subject to certain weight and length limits when operating double/triple trailers. These limits are set by federal and state regulations and must be followed to ensure safe operation of commercial motor vehicles.

Here are the maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement in Colorado:

1. Maximum weight limit: The total weight of any combination of vehicles with double/triple trailers cannot exceed 80,000 pounds.

2. Maximum length limit: The total length of any combination of vehicles with double/triple trailers cannot exceed 65 feet.

It's important to note that these weight and length limits apply to all commercial motor vehicles operating on Colorado's highways, including those with a CDL Doubles/Triples endorsement. Drivers who exceed these limits may face fines, penalties, or even suspension or revocation of their CDL license.

Additionally, drivers with a CDL Doubles/Triples endorsement must comply with all federal and state regulations regarding commercial motor vehicle operation and safety. This includes proper vehicle maintenance, driver training, and compliance with hours-of-service regulations.
Yes, there are specific safety considerations and regulations that drivers with a CDL Doubles/Triples endorsement must follow when operating double/triple trailers. These regulations are in place to ensure the safe operation of commercial motor vehicles and protect drivers, passengers, and other motorists on the road.

Here are some of the safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement:

1. Proper coupling and uncoupling: Drivers must ensure that the trailers are properly coupled and uncoupled to prevent accidents.

2. Weight distribution: Drivers must ensure that the weight of the cargo is properly distributed to prevent overloading or uneven weight distribution.

3. Braking systems: Double/triple trailers require special braking systems to ensure safe operation, so drivers must ensure that these systems are properly maintained and functioning.

4. Turning and cornering: Double/triple trailers require longer turning and stopping distances, so drivers must be aware of their surroundings and take extra precautions when turning or cornering.

5. Backing up: Backing up with double/triple trailers requires extra care and attention, as there is a greater risk of jackknifing or other accidents.

6. Special training requirements: Drivers with a CDL Doubles/Triples endorsement are required to undergo special training on the safe operation of double/triple trailers, which includes both classroom instruction and behind-the-wheel training.

It's important for drivers with a CDL Doubles/Triples endorsement to comply with all federal and state regulations regarding commercial motor vehicle operation and safety. This includes proper vehicle maintenance, driver training, and compliance with hours-of-service regulations. Failure to follow these regulations can result in fines, penalties, or even suspension or revocation of your CDL license.