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 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.
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Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Colorado, please follow these steps:
1. Obtain a valid Colorado driver's license and pass a written knowledge test for the Doubles/Triples endorsement.
2. You must be at least 21 years old to operate a commercial vehicle across state lines or transport hazardous materials.
3. Study the Colorado CDL Driver's Handbook and specifically the section on Doubles/Triples.
4. Schedule an appointment with your local Colorado DMV office to take the written knowledge test.
5. Pay the fee for the written knowledge test.
6. Pass the written knowledge test with a score of at least 80%.
7. Schedule an appointment for a CDL Driver's Skills Test with a Colorado State Patrol approved third-party tester.
8. Pay the fee for the skills test.
9. Pass the skills test, which includes a pre-trip vehicle inspection, basic control skills test, and an on-road driving test pulling doubles/triples.
10. Within 10 days of passing your skills test, visit your local Colorado DMV office to obtain your new CDL with Doubles/Triples endorsement.
Congratulations! You have successfully obtained your CDL Doubles/Triples endorsement in Colorado.
1. Obtain a valid Colorado driver's license and pass a written knowledge test for the Doubles/Triples endorsement.
2. You must be at least 21 years old to operate a commercial vehicle across state lines or transport hazardous materials.
3. Study the Colorado CDL Driver's Handbook and specifically the section on Doubles/Triples.
4. Schedule an appointment with your local Colorado DMV office to take the written knowledge test.
5. Pay the fee for the written knowledge test.
6. Pass the written knowledge test with a score of at least 80%.
7. Schedule an appointment for a CDL Driver's Skills Test with a Colorado State Patrol approved third-party tester.
8. Pay the fee for the skills test.
9. Pass the skills test, which includes a pre-trip vehicle inspection, basic control skills test, and an on-road driving test pulling doubles/triples.
10. Within 10 days of passing your skills test, visit your local Colorado DMV office to obtain your new CDL with Doubles/Triples endorsement.
Congratulations! You have successfully obtained your CDL Doubles/Triples endorsement in Colorado.
To get a CDL Doubles/Triples license in Colorado, you must meet the following requirements:
1. You must be at least 21 years old to operate a commercial vehicle across state lines or transport hazardous materials. If you are at least 18 years old, you may obtain a CDL for intrastate commerce only.
2. You must already have a valid Colorado driver's license.
3. You must pass a written knowledge test for the Doubles/Triples endorsement, which covers the rules and regulations specific to driving double and triple trailers.
4. You must have a valid Medical Examiner's Certificate or DOT Medical Card.
5. You must pass a skills test, which includes a pre-trip vehicle inspection, basic control skills test, and an on-road driving test pulling doubles/triples.
6. You must not have any disqualifying criminal convictions or driving offenses on your record.
7. You must provide proof of identity and residency in Colorado.
8. You must pay the required fees for obtaining the CDL Doubles/Triples endorsement.
Once all of these requirements are met, you will be issued a CDL with the Doubles/Triples endorsement in Colorado, allowing you to legally operate commercial vehicles with double or triple trailers on public roads.
1. You must be at least 21 years old to operate a commercial vehicle across state lines or transport hazardous materials. If you are at least 18 years old, you may obtain a CDL for intrastate commerce only.
2. You must already have a valid Colorado driver's license.
3. You must pass a written knowledge test for the Doubles/Triples endorsement, which covers the rules and regulations specific to driving double and triple trailers.
4. You must have a valid Medical Examiner's Certificate or DOT Medical Card.
5. You must pass a skills test, which includes a pre-trip vehicle inspection, basic control skills test, and an on-road driving test pulling doubles/triples.
6. You must not have any disqualifying criminal convictions or driving offenses on your record.
7. You must provide proof of identity and residency in Colorado.
8. You must pay the required fees for obtaining the CDL Doubles/Triples endorsement.
Once all of these requirements are met, you will be issued a CDL with the Doubles/Triples endorsement in Colorado, allowing you to legally operate commercial vehicles with double or triple trailers on public roads.
While Colorado does not require specific experience or training to obtain a CDL Doubles/Triples endorsement, it is highly recommended that you have experience and training before attempting to pass the skills test.
Driving a commercial vehicle with double or triple trailers can be challenging and requires a higher level of skill and knowledge. It is important to have a thorough understanding of the rules and regulations for driving double and triple trailers, as well as the proper techniques for maneuvering and controlling the vehicle.
Many individuals choose to enroll in a CDL training program or obtain on-the-job training with an experienced driver before attempting to obtain a Doubles/Triples endorsement. This can help you gain the necessary skills and experience to pass the skills test and safely operate a commercial vehicle with double or triple trailers.
Additionally, Colorado requires all CDL drivers to complete regular continuing education and training to maintain their license. This includes ongoing training on driving techniques, safety procedures, and changes to federal and state regulations.
Driving a commercial vehicle with double or triple trailers can be challenging and requires a higher level of skill and knowledge. It is important to have a thorough understanding of the rules and regulations for driving double and triple trailers, as well as the proper techniques for maneuvering and controlling the vehicle.
Many individuals choose to enroll in a CDL training program or obtain on-the-job training with an experienced driver before attempting to obtain a Doubles/Triples endorsement. This can help you gain the necessary skills and experience to pass the skills test and safely operate a commercial vehicle with double or triple trailers.
Additionally, Colorado requires all CDL drivers to complete regular continuing education and training to maintain their license. This includes ongoing training on driving techniques, safety procedures, and changes to federal and state regulations.
Yes, there is an additional written test that you must pass to obtain a CDL Doubles/Triples endorsement in Colorado. The written test specifically covers the rules and regulations for driving double and triple trailers.
The Colorado CDL Handbook contains all the information you need to know to pass the Doubles/Triples endorsement written test. You can obtain a copy of the handbook from the Colorado Department of Revenue or download it from their website.
It is important to study the handbook thoroughly and understand all the rules and regulations for driving double and triple trailers. This will not only help you pass the written test, but it will also help you safely operate a commercial vehicle with double or triple trailers.
Once you have passed the written test, you will be issued a CDL permit with the Doubles/Triples endorsement, which will allow you to practice driving double or triple trailers under the supervision of a licensed CDL driver. You must then pass a skills test, which includes a pre-trip vehicle inspection, basic control skills test, and an on-road driving test pulling doubles/triples, to obtain the full CDL Doubles/Triples endorsement.
The Colorado CDL Handbook contains all the information you need to know to pass the Doubles/Triples endorsement written test. You can obtain a copy of the handbook from the Colorado Department of Revenue or download it from their website.
It is important to study the handbook thoroughly and understand all the rules and regulations for driving double and triple trailers. This will not only help you pass the written test, but it will also help you safely operate a commercial vehicle with double or triple trailers.
Once you have passed the written test, you will be issued a CDL permit with the Doubles/Triples endorsement, which will allow you to practice driving double or triple trailers under the supervision of a licensed CDL driver. You must then pass a skills test, which includes a pre-trip vehicle inspection, basic control skills test, and an on-road driving test pulling doubles/triples, to obtain the full CDL Doubles/Triples endorsement.
To pass the CDL Doubles/Triples endorsement test in Colorado, you must demonstrate specific skills and maneuvers related to driving double or triple trailers. The skills test is broken down into three parts:
1. Pre-trip inspection: You must be able to perform a thorough inspection of your vehicle and demonstrate knowledge of the components and systems of your vehicle.
2. Basic control skills: You will be required to perform several maneuvers that demonstrate your ability to control your vehicle in tight spaces. These maneuvers may include straight-line backing, offset backing, and parallel parking.
3. On-road driving: You will be required to drive on public roads while pulling double or triple trailers. The examiner will evaluate your ability to safely operate the vehicle, including your ability to accelerate, brake, turn, and maneuver in traffic.
During the on-road test, you will also be evaluated on your ability to manage space and maintain safe following distances. You must also demonstrate an understanding of the additional risks associated with driving double or triple trailers, such as increased stopping distance and reduced visibility.
It is important to practice these skills and maneuvers before taking the CDL Doubles/Triples endorsement test. Consider enrolling in a CDL training program or obtaining on-the-job training with an experienced driver to gain experience in driving double or triple trailers. By practicing and gaining experience, you can increase your chances of passing the skills test and safely operating a commercial vehicle with double or triple trailers.
1. Pre-trip inspection: You must be able to perform a thorough inspection of your vehicle and demonstrate knowledge of the components and systems of your vehicle.
2. Basic control skills: You will be required to perform several maneuvers that demonstrate your ability to control your vehicle in tight spaces. These maneuvers may include straight-line backing, offset backing, and parallel parking.
3. On-road driving: You will be required to drive on public roads while pulling double or triple trailers. The examiner will evaluate your ability to safely operate the vehicle, including your ability to accelerate, brake, turn, and maneuver in traffic.
During the on-road test, you will also be evaluated on your ability to manage space and maintain safe following distances. You must also demonstrate an understanding of the additional risks associated with driving double or triple trailers, such as increased stopping distance and reduced visibility.
It is important to practice these skills and maneuvers before taking the CDL Doubles/Triples endorsement test. Consider enrolling in a CDL training program or obtaining on-the-job training with an experienced driver to gain experience in driving double or triple trailers. By practicing and gaining experience, you can increase your chances of passing the skills test and safely operating a commercial vehicle with double or triple trailers.
No, you cannot operate double or triple trailers without a CDL Doubles/Triples endorsement. In Colorado, a CDL Doubles/Triples endorsement is required to operate a commercial motor vehicle that is pulling two or three trailers.
Operating double or triple trailers without the proper endorsement can result in serious consequences, including fines, suspension or revocation of your CDL, and even criminal charges if an accident occurs.
It is important to obtain the proper CDL endorsements and follow all state and federal regulations to ensure the safety of yourself and other drivers on the road. If you are unsure about which endorsements you need for your specific vehicle or load, consult the Colorado CDL Handbook or speak with a qualified CDL instructor.
Operating double or triple trailers without the proper endorsement can result in serious consequences, including fines, suspension or revocation of your CDL, and even criminal charges if an accident occurs.
It is important to obtain the proper CDL endorsements and follow all state and federal regulations to ensure the safety of yourself and other drivers on the road. If you are unsure about which endorsements you need for your specific vehicle or load, consult the Colorado CDL Handbook or speak with a qualified CDL instructor.
Yes, you can add the CDL Doubles/Triples endorsement to your existing CDL license in Colorado. You will need to pass the required knowledge and skills tests for the endorsement and pay a fee to add it to your license.
To add the Doubles/Triples endorsement to your CDL license, you can visit a Colorado Division of Motor Vehicles (DMV) office and provide the necessary documentation. You will need to bring your current CDL license, a valid medical certificate, and any other required documents.
You will then need to pass the knowledge test for the Doubles/Triples endorsement. Once you pass the knowledge test, you will need to take a skills test to demonstrate your ability to safely operate a vehicle with double or triple trailers.
After passing both tests, you can pay the required fee and have the endorsement added to your CDL license. It is important to note that you must renew your CDL license and endorsements every four years in Colorado.
Overall, adding the Doubles/Triples endorsement to your existing CDL license is a straightforward process as long as you meet all of the requirements and pass the necessary tests.
To add the Doubles/Triples endorsement to your CDL license, you can visit a Colorado Division of Motor Vehicles (DMV) office and provide the necessary documentation. You will need to bring your current CDL license, a valid medical certificate, and any other required documents.
You will then need to pass the knowledge test for the Doubles/Triples endorsement. Once you pass the knowledge test, you will need to take a skills test to demonstrate your ability to safely operate a vehicle with double or triple trailers.
After passing both tests, you can pay the required fee and have the endorsement added to your CDL license. It is important to note that you must renew your CDL license and endorsements every four years in Colorado.
Overall, adding the Doubles/Triples endorsement to your existing CDL license is a straightforward process as long as you meet all of the requirements and pass the necessary tests.
Yes, there are some restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Colorado.
First, drivers with a Doubles/Triples endorsement are only authorized to operate a commercial motor vehicle with two or three trailers. They are not authorized to operate any other type of commercial motor vehicle that requires a different type of endorsement or license.
Secondly, drivers with a Doubles/Triples endorsement must follow all state and federal regulations regarding the safe operation of commercial motor vehicles with multiple trailers. This includes following all weight and length restrictions, making sure that all trailers are properly connected and secured, and maintaining safe speeds and braking distances.
Additionally, there may be specific restrictions or limitations based on the type of cargo being transported. For example, hazardous materials may require additional training or certifications.
It is important for drivers with a Doubles/Triples endorsement to be aware of all restrictions and limitations in order to operate their vehicles safely and legally. Violating any of these restrictions can result in fines, suspension or revocation of their CDL license, and even criminal charges in some cases.
First, drivers with a Doubles/Triples endorsement are only authorized to operate a commercial motor vehicle with two or three trailers. They are not authorized to operate any other type of commercial motor vehicle that requires a different type of endorsement or license.
Secondly, drivers with a Doubles/Triples endorsement must follow all state and federal regulations regarding the safe operation of commercial motor vehicles with multiple trailers. This includes following all weight and length restrictions, making sure that all trailers are properly connected and secured, and maintaining safe speeds and braking distances.
Additionally, there may be specific restrictions or limitations based on the type of cargo being transported. For example, hazardous materials may require additional training or certifications.
It is important for drivers with a Doubles/Triples endorsement to be aware of all restrictions and limitations in order to operate their vehicles safely and legally. Violating any of these restrictions can result in fines, suspension or revocation of their CDL license, and even criminal charges in some cases.
In Colorado, there are specific weight and length limits for commercial motor vehicles with double or triple trailers. These limits are regulated by the Colorado Department of Transportation (CDOT) and the Federal Motor Carrier Safety Administration (FMCSA).
For a commercial vehicle with double trailers, the maximum weight limit is 80,000 pounds. Each trailer must not exceed 28.5 feet in length, and the overall length of the entire vehicle may not exceed 65 feet.
For a commercial vehicle with triple trailers, the maximum weight limit is also 80,000 pounds. Each trailer must not exceed 28.5 feet in length, and the overall length of the entire vehicle may not exceed 75 feet.
It is important for drivers with a CDL Doubles/Triples endorsement to be aware of these weight and length limits and to comply with all regulations when operating their vehicles. Violating these limits can result in fines, penalties, or even suspension or revocation of their CDL license.
For a commercial vehicle with double trailers, the maximum weight limit is 80,000 pounds. Each trailer must not exceed 28.5 feet in length, and the overall length of the entire vehicle may not exceed 65 feet.
For a commercial vehicle with triple trailers, the maximum weight limit is also 80,000 pounds. Each trailer must not exceed 28.5 feet in length, and the overall length of the entire vehicle may not exceed 75 feet.
It is important for drivers with a CDL Doubles/Triples endorsement to be aware of these weight and length limits and to comply with all regulations when operating their vehicles. Violating these limits can result in fines, penalties, or even suspension or revocation of their CDL license.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Colorado.
Here are some of the safety considerations and regulations:
1. Inspection: Drivers with a Doubles/Triples endorsement must conduct a thorough inspection of their vehicle before driving, making sure that all trailers are properly connected, secured, and aligned. Any issues or defects must be addressed before the vehicle can be driven.
2. Speed limit: Drivers must follow posted speed limits and adjust their speed based on road conditions and weather.
3. Braking: Drivers must maintain a safe following distance and allow for longer stopping distances due to the weight and length of the vehicle.
4. Turning: Drivers must be careful when turning due to the length of the vehicle. They should use their turn signals well in advance and make wide turns when necessary.
5. Lane changing: Drivers should avoid sudden or sharp movements when changing lanes. They should use mirrors to check for other vehicles and signal well in advance.
6. Weight distribution: Drivers should make sure that cargo is properly distributed in each trailer to maintain stability and prevent rollovers.
7. Height clearance: Drivers should be aware of height clearance restrictions when driving under bridges or overpasses.
8. Communication: Drivers with multiple trailers must communicate effectively with other drivers on the road, using hand signals or CB radios to indicate lane changes, turns, or stops.
It is important for drivers with a CDL Doubles/Triples endorsement to follow all safety considerations and regulations when operating their vehicles to ensure the safety of themselves and others on the road. Violating any of these regulations can result in fines, penalties, or even suspension or revocation of their CDL license.
Here are some of the safety considerations and regulations:
1. Inspection: Drivers with a Doubles/Triples endorsement must conduct a thorough inspection of their vehicle before driving, making sure that all trailers are properly connected, secured, and aligned. Any issues or defects must be addressed before the vehicle can be driven.
2. Speed limit: Drivers must follow posted speed limits and adjust their speed based on road conditions and weather.
3. Braking: Drivers must maintain a safe following distance and allow for longer stopping distances due to the weight and length of the vehicle.
4. Turning: Drivers must be careful when turning due to the length of the vehicle. They should use their turn signals well in advance and make wide turns when necessary.
5. Lane changing: Drivers should avoid sudden or sharp movements when changing lanes. They should use mirrors to check for other vehicles and signal well in advance.
6. Weight distribution: Drivers should make sure that cargo is properly distributed in each trailer to maintain stability and prevent rollovers.
7. Height clearance: Drivers should be aware of height clearance restrictions when driving under bridges or overpasses.
8. Communication: Drivers with multiple trailers must communicate effectively with other drivers on the road, using hand signals or CB radios to indicate lane changes, turns, or stops.
It is important for drivers with a CDL Doubles/Triples endorsement to follow all safety considerations and regulations when operating their vehicles to ensure the safety of themselves and others on the road. Violating any of these regulations can result in fines, penalties, or even suspension or revocation of their CDL license.
