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 three possible answer choices. Test questions come from the Missouri Commercial Driver’s 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 using your turn signal, you should:
Explanation
Always begin signaling well in advance of a turn. This is the best way to ensure that other drivers do not try to pass you. Without using a turn signal, drivers may assume that you are merely slowing down or stopping when you are planning to turn.
9. To prevent a trailer from rolling over while turning, you should:
Explanation
Rollovers happen when an operator turns too fast. Drivers should be sure to slow down before entering turns and curves, especially when pulling a trailer.
10. Hydroplaning happens most often when:
Explanation
Hydroplaning is most likely to occur when driving on wet roads with tire pressure that is too low and tire tread that is too worn. If there is enough water on the road, hydroplaning can occur at speeds as low as 30 mph.
11. When driving a vehicle, rough acceleration is:
Explanation
When accelerating, speed up smoothly and gradually so your vehicle does not jerk. Rough acceleration can cause mechanical damage.
12. If there is ice on the front of your side mirror:
Explanation
If your mirrors or wiper blades become icy while you are driving, you can expect the road surface to be icy as well.
13. When parking, you should not use the parking brake if:
Explanation
If your brakes are hot after coming down a steep grade, you should not use your parking brake when parking. Let your brakes cool before applying the parking brake or risk damaging the brakes.
14. On a curve, the posted speed limit:
Explanation
The posted speed limit on a curve may be safe to be taken by cars, but can still be too fast to be taken by larger vehicles, such as trucks. An operator driving their truck at the posted limit on a curve could cause their vehicle to tip over.
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Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Missouri, follow these steps:
1. Obtain a Missouri CDL: First of all, you must hold a Missouri Commercial Driver's License (CDL) or be in the process of obtaining one.
2. Study the Missouri CDL Manual: Study the Missouri CDL Manual and pay particular attention to the section on Doubles and Triples.
3. Schedule a Knowledge Test: Schedule an appointment for the Doubles/Triples endorsement knowledge test at your nearest Missouri State Highway Patrol Driver Examination Station.
4. Pass the Knowledge Test: On the day of your appointment, take and pass the Doubles/Triples endorsement knowledge test.
5. Pay the endorsement fee: Pay the required fee for adding the Doubles/Triples endorsement to your CDL.
6. Practice driving doubles/triples: After obtaining your endorsement, practice driving doubles and triples with an experienced driver to gain practical experience.
7. Pass a Skills Test: When you feel ready, schedule and pass the Doubles/Triples Skills Test to obtain your full endorsement.
Note: To add any additional endorsements to your CDL, you will need to complete Steps 3-7 for each endorsement you wish to obtain.
1. Obtain a Missouri CDL: First of all, you must hold a Missouri Commercial Driver's License (CDL) or be in the process of obtaining one.
2. Study the Missouri CDL Manual: Study the Missouri CDL Manual and pay particular attention to the section on Doubles and Triples.
3. Schedule a Knowledge Test: Schedule an appointment for the Doubles/Triples endorsement knowledge test at your nearest Missouri State Highway Patrol Driver Examination Station.
4. Pass the Knowledge Test: On the day of your appointment, take and pass the Doubles/Triples endorsement knowledge test.
5. Pay the endorsement fee: Pay the required fee for adding the Doubles/Triples endorsement to your CDL.
6. Practice driving doubles/triples: After obtaining your endorsement, practice driving doubles and triples with an experienced driver to gain practical experience.
7. Pass a Skills Test: When you feel ready, schedule and pass the Doubles/Triples Skills Test to obtain your full endorsement.
Note: To add any additional endorsements to your CDL, you will need to complete Steps 3-7 for each endorsement you wish to obtain.
To obtain a CDL Doubles/Triples license in Missouri, you must meet the following requirements:
1. Hold or be eligible for a Missouri CDL: You must have a valid Missouri Commercial Driver's License (CDL) or be eligible to obtain one.
2. Meet age requirements: You must be at least 21 years old to operate a commercial vehicle that transports hazardous materials (or 18 years old for non-hazardous materials).
3. Pass a physical examination: You must pass a physical examination to ensure you are physically fit to operate a commercial vehicle.
4. Have a clean driving record: You must have a clean driving record and not have any disqualifying offenses on your record.
5. Pass the Doubles/Triples endorsement knowledge test: You must pass the endorsement knowledge test specific to doubles/triples vehicles.
6. Pass the Doubles/Triples Skills Test: You must pass the skills test for doubles/triples vehicles, which includes pre-trip inspection, basic control skills, and on-road driving.
7. Pay the endorsement fee: You must pay the required fee for adding the Doubles/Triples endorsement to your CDL.
Note that there may be additional requirements depending on your specific situation, such as background checks or additional endorsements needed for certain types of cargo. It's always best to check with your local Missouri State Highway Patrol Driver Examination Station for more information on obtaining a CDL Doubles/Triples license in Missouri.
1. Hold or be eligible for a Missouri CDL: You must have a valid Missouri Commercial Driver's License (CDL) or be eligible to obtain one.
2. Meet age requirements: You must be at least 21 years old to operate a commercial vehicle that transports hazardous materials (or 18 years old for non-hazardous materials).
3. Pass a physical examination: You must pass a physical examination to ensure you are physically fit to operate a commercial vehicle.
4. Have a clean driving record: You must have a clean driving record and not have any disqualifying offenses on your record.
5. Pass the Doubles/Triples endorsement knowledge test: You must pass the endorsement knowledge test specific to doubles/triples vehicles.
6. Pass the Doubles/Triples Skills Test: You must pass the skills test for doubles/triples vehicles, which includes pre-trip inspection, basic control skills, and on-road driving.
7. Pay the endorsement fee: You must pay the required fee for adding the Doubles/Triples endorsement to your CDL.
Note that there may be additional requirements depending on your specific situation, such as background checks or additional endorsements needed for certain types of cargo. It's always best to check with your local Missouri State Highway Patrol Driver Examination Station for more information on obtaining a CDL Doubles/Triples license in Missouri.
Yes, you do need specific experience and training to obtain a CDL Doubles/Triples endorsement in Missouri.
Before taking the Doubles/Triples Skills Test, you must first complete a behind-the-wheel training program or have experience driving doubles/triples vehicles. The specific requirements are as follows:
1. Completion of a training program: You must complete an approved behind-the-wheel training program for driving doubles/triples vehicles that meets the Missouri Department of Revenue's minimum standards.
OR
2. Experience driving doubles/triples: If you do not complete a training program, you must have at least one year of experience driving a vehicle with a CDL that is similar in size and weight to a doubles/triples vehicle.
In addition to the above requirements, it is recommended that you practice driving doubles/triples with an experienced driver to gain practical experience before taking the skills test.
It's always best to check with your local Missouri State Highway Patrol Driver Examination Station for more information on the specific training and experience requirements for obtaining a CDL Doubles/Triples endorsement in Missouri.
Before taking the Doubles/Triples Skills Test, you must first complete a behind-the-wheel training program or have experience driving doubles/triples vehicles. The specific requirements are as follows:
1. Completion of a training program: You must complete an approved behind-the-wheel training program for driving doubles/triples vehicles that meets the Missouri Department of Revenue's minimum standards.
OR
2. Experience driving doubles/triples: If you do not complete a training program, you must have at least one year of experience driving a vehicle with a CDL that is similar in size and weight to a doubles/triples vehicle.
In addition to the above requirements, it is recommended that you practice driving doubles/triples with an experienced driver to gain practical experience before taking the skills test.
It's always best to check with your local Missouri State Highway Patrol Driver Examination Station for more information on the specific training and experience requirements for obtaining a CDL Doubles/Triples endorsement in Missouri.
Yes, there is an additional written test or exam that you must pass to obtain a CDL Doubles/Triples endorsement in Missouri.
In addition to passing the general knowledge test and any other required endorsement knowledge tests, you must also pass the Doubles/Triples endorsement knowledge test. This test covers topics specific to driving doubles/triples vehicles, such as coupling and uncoupling procedures, inspecting doubles/triples vehicles, and safe driving practices.
To prepare for the Doubles/Triples endorsement knowledge test, you can study the Missouri CDL Manual, which includes information on doubles/triples vehicles and safe driving practices. There are also practice tests available online to help you prepare for the exam.
It's important to note that if you fail the endorsement knowledge test, you may have to wait a certain period of time before retaking it. It's always best to study and prepare thoroughly before taking any CDL exam or test.
In addition to passing the general knowledge test and any other required endorsement knowledge tests, you must also pass the Doubles/Triples endorsement knowledge test. This test covers topics specific to driving doubles/triples vehicles, such as coupling and uncoupling procedures, inspecting doubles/triples vehicles, and safe driving practices.
To prepare for the Doubles/Triples endorsement knowledge test, you can study the Missouri CDL Manual, which includes information on doubles/triples vehicles and safe driving practices. There are also practice tests available online to help you prepare for the exam.
It's important to note that if you fail the endorsement knowledge test, you may have to wait a certain period of time before retaking it. It's always best to study and prepare thoroughly before taking any CDL exam or test.
To obtain a CDL Doubles/Triples endorsement in Missouri, you must pass a skills test that includes specific maneuvers related to driving doubles/triples vehicles. The skills test is divided into three parts:
1. Pre-trip inspection: You will be asked to do a pre-trip inspection of the doubles/triples vehicle to ensure it is in safe operating condition. This includes checking the coupling system, air brake system, electrical system, tires, and other components.
2. Basic control skills: You will be asked to perform several basic control maneuvers, including straight line backing, offset backing, and parallel parking. These maneuvers are designed to test your ability to maneuver the doubles/triples vehicle safely and accurately in tight spaces.
3. On-road driving: You will be asked to drive the doubles/triples vehicle on public roads while demonstrating safe driving practices and proper use of the coupling system. The examiner will evaluate your ability to handle the vehicle safely in traffic, maintain proper speed and following distance, and execute turns and lane changes safely.
It's important to note that the skills test must be taken in a vehicle that is representative of the type of doubles/triples you will be driving with your CDL Doubles/Triples endorsement. You must also be accompanied by a licensed CDL holder with a Doubles/Triples endorsement while taking the skills test.
It's always best to practice these skills with an experienced driver before taking the skills test. This will help you feel more confident behind the wheel and increase your chances of passing the test on your first attempt.
1. Pre-trip inspection: You will be asked to do a pre-trip inspection of the doubles/triples vehicle to ensure it is in safe operating condition. This includes checking the coupling system, air brake system, electrical system, tires, and other components.
2. Basic control skills: You will be asked to perform several basic control maneuvers, including straight line backing, offset backing, and parallel parking. These maneuvers are designed to test your ability to maneuver the doubles/triples vehicle safely and accurately in tight spaces.
3. On-road driving: You will be asked to drive the doubles/triples vehicle on public roads while demonstrating safe driving practices and proper use of the coupling system. The examiner will evaluate your ability to handle the vehicle safely in traffic, maintain proper speed and following distance, and execute turns and lane changes safely.
It's important to note that the skills test must be taken in a vehicle that is representative of the type of doubles/triples you will be driving with your CDL Doubles/Triples endorsement. You must also be accompanied by a licensed CDL holder with a Doubles/Triples endorsement while taking the skills test.
It's always best to practice these skills with an experienced driver before taking the skills test. This will help you feel more confident behind the wheel and increase your chances of passing the test on your first attempt.
No, you cannot legally operate double/triple trailers without a CDL Doubles/Triples endorsement in Missouri.
According to Missouri law, any driver operating a commercial motor vehicle (CMV) that pulls two or three trailers must have a CDL Doubles/Triples endorsement on their commercial driver's license. This applies to both interstate and intrastate operations.
Without the endorsement, you may be subject to fines, penalties, and even the suspension or revocation of your CDL. Additionally, your employer may be subject to fines or other penalties for allowing you to operate a doubles/triples vehicle without the proper endorsement.
It's important to note that obtaining a CDL Doubles/Triples endorsement requires passing both a written test and a skills test. This ensures that drivers have the knowledge and skills necessary to safely operate doubles/triples vehicles on public roads.
If you are unsure whether you need a CDL Doubles/Triples endorsement for your job or have any other questions about obtaining a CDL in Missouri, it's best to consult with the Missouri Department of Revenue or an experienced commercial driving instructor.
According to Missouri law, any driver operating a commercial motor vehicle (CMV) that pulls two or three trailers must have a CDL Doubles/Triples endorsement on their commercial driver's license. This applies to both interstate and intrastate operations.
Without the endorsement, you may be subject to fines, penalties, and even the suspension or revocation of your CDL. Additionally, your employer may be subject to fines or other penalties for allowing you to operate a doubles/triples vehicle without the proper endorsement.
It's important to note that obtaining a CDL Doubles/Triples endorsement requires passing both a written test and a skills test. This ensures that drivers have the knowledge and skills necessary to safely operate doubles/triples vehicles on public roads.
If you are unsure whether you need a CDL Doubles/Triples endorsement for your job or have any other questions about obtaining a CDL in Missouri, it's best to consult with the Missouri Department of Revenue or an experienced commercial driving instructor.
You can add a CDL Doubles/Triples endorsement to your existing CDL license in Missouri.
To add the endorsement to your CDL license, you will need to:
1. Pass the written test: You will need to pass the Missouri CDL Doubles/Triples endorsement written test. The test covers knowledge related to driving double/triple trailers, including coupling and uncoupling procedures, inspection, and safe driving practices.
2. Pass the skills test: Once you have passed the written test, you will need to take and pass the Missouri CDL Doubles/Triples endorsement skills test. The skills test will evaluate your ability to safely operate a double/triple trailer and includes a pre-trip inspection, basic control skills, and on-road driving.
3. Pay the fee: You will need to pay a fee to add the endorsement to your CDL license.
It's important to note that you must already have a valid CDL license before you can add the Doubles/Triples endorsement. If your CDL has expired or been suspended or revoked, you will need to renew or reinstate it before adding the endorsement.
You can apply for the CDL Doubles/Triples endorsement at any Missouri Department of Revenue licensing office that offers CDL services.
Once you have passed both tests and paid the fee, the Missouri Department of Revenue will add the endorsement to your existing CDL license. This will allow you to legally operate double/triple trailers in Missouri as long as your license remains valid and in good standing.
To add the endorsement to your CDL license, you will need to:
1. Pass the written test: You will need to pass the Missouri CDL Doubles/Triples endorsement written test. The test covers knowledge related to driving double/triple trailers, including coupling and uncoupling procedures, inspection, and safe driving practices.
2. Pass the skills test: Once you have passed the written test, you will need to take and pass the Missouri CDL Doubles/Triples endorsement skills test. The skills test will evaluate your ability to safely operate a double/triple trailer and includes a pre-trip inspection, basic control skills, and on-road driving.
3. Pay the fee: You will need to pay a fee to add the endorsement to your CDL license.
It's important to note that you must already have a valid CDL license before you can add the Doubles/Triples endorsement. If your CDL has expired or been suspended or revoked, you will need to renew or reinstate it before adding the endorsement.
You can apply for the CDL Doubles/Triples endorsement at any Missouri Department of Revenue licensing office that offers CDL services.
Once you have passed both tests and paid the fee, the Missouri Department of Revenue will add the endorsement to your existing CDL license. This will allow you to legally operate double/triple trailers in Missouri as long as your license remains valid and in good standing.
Yes, there are restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Missouri.
Some of the restrictions and limitations for drivers with a CDL Doubles/Triples endorsement include:
1. Vehicle size and weight limits: You will need to comply with Missouri's size and weight limits for commercial motor vehicles.
2. Special driving skills: You will need to have special driving skills to operate double/triple trailers, including the ability to maneuver and control the vehicle safely.
3. Reduced speed limits: You may need to drive at reduced speeds, especially when navigating curves, hills, or other challenging road conditions.
4. Special road restrictions: You may be restricted from certain roads or highways that are not suitable for double/triple trailers.
5. Additional safety equipment: You may be required to have additional safety equipment on your vehicle, such as extra mirrors or lights.
It's important to note that these restrictions and limitations are in place to ensure the safety of drivers, other motorists, and pedestrians on the road. It's important to follow all Missouri traffic laws and regulations when operating a double/triple trailer.
Additionally, if you violate any of these restrictions or limitations while operating a double/triple trailer, you may be subject to fines, penalties, or even the suspension or revocation of your CDL license.
Some of the restrictions and limitations for drivers with a CDL Doubles/Triples endorsement include:
1. Vehicle size and weight limits: You will need to comply with Missouri's size and weight limits for commercial motor vehicles.
2. Special driving skills: You will need to have special driving skills to operate double/triple trailers, including the ability to maneuver and control the vehicle safely.
3. Reduced speed limits: You may need to drive at reduced speeds, especially when navigating curves, hills, or other challenging road conditions.
4. Special road restrictions: You may be restricted from certain roads or highways that are not suitable for double/triple trailers.
5. Additional safety equipment: You may be required to have additional safety equipment on your vehicle, such as extra mirrors or lights.
It's important to note that these restrictions and limitations are in place to ensure the safety of drivers, other motorists, and pedestrians on the road. It's important to follow all Missouri traffic laws and regulations when operating a double/triple trailer.
Additionally, if you violate any of these restrictions or limitations while operating a double/triple trailer, you may be subject to fines, penalties, or even the suspension or revocation of your CDL license.
In Missouri, the maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement are as follows:
1. Maximum weight: The maximum weight of a double/triple trailer combination is 80,000 pounds.
2. Maximum length: The maximum length of a double/triple trailer combination is 28 feet per trailer for doubles or 28 feet per trailer for triples. The overall length of the entire combination cannot exceed 68 feet.
It's important to note that these weight and length limits may vary depending on the specific type of cargo being transported and the route being taken. Additionally, some roads or highways may have weight or length limits that are lower than the state maximums.
It's important to follow all Missouri traffic laws and regulations when operating a double/triple trailer, including complying with size and weight limits and following any special road restrictions. Failure to comply with these laws can result in fines, penalties, or even the suspension or revocation of your CDL license.
1. Maximum weight: The maximum weight of a double/triple trailer combination is 80,000 pounds.
2. Maximum length: The maximum length of a double/triple trailer combination is 28 feet per trailer for doubles or 28 feet per trailer for triples. The overall length of the entire combination cannot exceed 68 feet.
It's important to note that these weight and length limits may vary depending on the specific type of cargo being transported and the route being taken. Additionally, some roads or highways may have weight or length limits that are lower than the state maximums.
It's important to follow all Missouri traffic laws and regulations when operating a double/triple trailer, including complying with size and weight limits and following any special road restrictions. Failure to comply with these laws can result in fines, penalties, or even the suspension or revocation of your CDL license.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Missouri.
Some of the safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement include:
1. Maneuvering: It's important to be able to maneuver and control your vehicle safely. This includes making turns, backing up, and parking.
2. Coupling and uncoupling: You must be able to properly couple and uncouple your vehicle and trailers.
3. Weight distribution: You must ensure that the weight is properly distributed in your trailers, so that there is no overloading or underloading of any axle.
4. Inspection: You must inspect your vehicle and trailers before every trip to ensure that they are in good working condition.
5. Speed limits: You may need to drive at reduced speeds, especially when navigating curves, hills, or other challenging road conditions.
6. Special road restrictions: You may be restricted from certain roads or highways that are not suitable for double/triple trailers.
7. Additional safety equipment: You may be required to have additional safety equipment on your vehicle, such as extra mirrors or lights.
It's important to note that these safety considerations and regulations are in place to ensure the safety of drivers, other motorists, and pedestrians on the road. It's important to follow all Missouri traffic laws and regulations when operating a double/triple trailer.
Additionally, if you violate any of these safety considerations or regulations while operating a double/triple trailer, you may be subject to fines, penalties, or even the suspension or revocation of your CDL license.
Some of the safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement include:
1. Maneuvering: It's important to be able to maneuver and control your vehicle safely. This includes making turns, backing up, and parking.
2. Coupling and uncoupling: You must be able to properly couple and uncouple your vehicle and trailers.
3. Weight distribution: You must ensure that the weight is properly distributed in your trailers, so that there is no overloading or underloading of any axle.
4. Inspection: You must inspect your vehicle and trailers before every trip to ensure that they are in good working condition.
5. Speed limits: You may need to drive at reduced speeds, especially when navigating curves, hills, or other challenging road conditions.
6. Special road restrictions: You may be restricted from certain roads or highways that are not suitable for double/triple trailers.
7. Additional safety equipment: You may be required to have additional safety equipment on your vehicle, such as extra mirrors or lights.
It's important to note that these safety considerations and regulations are in place to ensure the safety of drivers, other motorists, and pedestrians on the road. It's important to follow all Missouri traffic laws and regulations when operating a double/triple trailer.
Additionally, if you violate any of these safety considerations or regulations while operating a double/triple trailer, you may be subject to fines, penalties, or even the suspension or revocation of your CDL license.
