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 or four possible answer choices. Test questions come from the Alabama 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
1. What happens when the wheels of a trailer lock up?
Explanation
A trailer tends to swing around, potentially resulting in a trailer jackknife, if its wheels lock up.
2. Before beginning a trip, you should:
Explanation
Before a trip, you should ensure that air reaches all air brakes on all trailers by opening up the rear emergency line and service line shut-off valves and listening for escaping air. Close both shut-off valves before beginning to drive.
3. When operating a vehicle with a dual brake system, a driver should:
Explanation
Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum pressure of 100 psi in both the primary and secondary systems.
4. To help prevent rollovers, you should:
Explanation
To lower the risk of a rollover, load your cargo as closely to the ground as possible. To further reduce this risk, take curves and corners slowly.
5. To avoid a collision with a hazard on the roadway:
Explanation
Swerving out of the way of a hazard is sometimes safer than trying to stop before reaching the hazard. You can usually turn away from something more quickly than you can come to a complete stop.
6. If using air tanks with manually operated drains, how often should you drain the tanks?
Explanation
To prevent the build up of oil and water in a vehicle's air tanks, manually operated air tank drains should be used at the end of each day of driving.
7. Having ABS on only one axle:
Explanation
If you have an Anti-Lock Braking System (ABS) equipped on only the tractor, only the trailer, or only one axle, you will still have more control over the vehicle when braking than you would without ABS. You should brake normally.
Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Alabama, you need to follow these steps:
1. Meet the eligibility requirements: You must be at least 21 years old, possess a valid Alabama CDL, and have a clean driving record.
2. Study the Alabama CDL Driver's Manual: You can download it from the Alabama Department of Public Safety website or obtain a printed copy from any driver's license office.
3. Pass the CDL Doubles/Triples Knowledge Test: You must pass a written test on doubles/triples operation to obtain the endorsement. You can schedule an appointment for the test at your nearest driver's license office.
4. Pay the fee: There is a fee for adding endorsements to your CDL in Alabama. Check with your local driver's license office for the exact amount.
5. Pass the CDL Doubles/Triples Skills Test: Once you have passed the knowledge test and paid the fee, you will need to pass a skills test that involves driving a combination vehicle with doubles or triples attached. You can schedule an appointment for this test at your nearest driver's license office.
6. Receive your endorsement: If you pass both tests and meet all other requirements, you will be issued a new CDL with the Doubles/Triples endorsement added to it.
Note: If you are not currently licensed to operate combination vehicles, you will need to obtain that endorsement first before being eligible for the Doubles/Triples endorsement.
1. Meet the eligibility requirements: You must be at least 21 years old, possess a valid Alabama CDL, and have a clean driving record.
2. Study the Alabama CDL Driver's Manual: You can download it from the Alabama Department of Public Safety website or obtain a printed copy from any driver's license office.
3. Pass the CDL Doubles/Triples Knowledge Test: You must pass a written test on doubles/triples operation to obtain the endorsement. You can schedule an appointment for the test at your nearest driver's license office.
4. Pay the fee: There is a fee for adding endorsements to your CDL in Alabama. Check with your local driver's license office for the exact amount.
5. Pass the CDL Doubles/Triples Skills Test: Once you have passed the knowledge test and paid the fee, you will need to pass a skills test that involves driving a combination vehicle with doubles or triples attached. You can schedule an appointment for this test at your nearest driver's license office.
6. Receive your endorsement: If you pass both tests and meet all other requirements, you will be issued a new CDL with the Doubles/Triples endorsement added to it.
Note: If you are not currently licensed to operate combination vehicles, you will need to obtain that endorsement first before being eligible for the Doubles/Triples endorsement.
To get a CDL Doubles/Triples license in Alabama, you must meet the following requirements:
1. Age requirement: You must be at least 21 years old to apply for a CDL Doubles/Triples license in Alabama.
2. Valid driver's license: You must have a valid Alabama driver's license.
3. Commercial Learner’s Permit (CLP): You must obtain a CLP before applying for the final CDL Doubles/Triples license.
4. Experience: You must have at least one year of driving experience with a valid CDL.
5. Clean driving record: You must have a clean driving record with no serious traffic violations or DUI convictions.
6. Pass the CDL Doubles/Triples Knowledge Test: You must pass a written test on doubles/triples operation to obtain the endorsement.
7. Pass the CDL Doubles/Triples Skills Test: You must pass a skills test that involves driving a combination vehicle with doubles or triples attached.
8. Pay the fee: There is a fee for adding endorsements to your CDL in Alabama. Check with your local driver's license office for the exact amount.
Note: It is important to note that if you are not currently licensed to operate combination vehicles, you will need to obtain that endorsement first before being eligible for the Doubles/Triples endorsement.
1. Age requirement: You must be at least 21 years old to apply for a CDL Doubles/Triples license in Alabama.
2. Valid driver's license: You must have a valid Alabama driver's license.
3. Commercial Learner’s Permit (CLP): You must obtain a CLP before applying for the final CDL Doubles/Triples license.
4. Experience: You must have at least one year of driving experience with a valid CDL.
5. Clean driving record: You must have a clean driving record with no serious traffic violations or DUI convictions.
6. Pass the CDL Doubles/Triples Knowledge Test: You must pass a written test on doubles/triples operation to obtain the endorsement.
7. Pass the CDL Doubles/Triples Skills Test: You must pass a skills test that involves driving a combination vehicle with doubles or triples attached.
8. Pay the fee: There is a fee for adding endorsements to your CDL in Alabama. Check with your local driver's license office for the exact amount.
Note: It is important to note that if you are not currently licensed to operate combination vehicles, you will need to obtain that endorsement first before being eligible for the Doubles/Triples endorsement.
Yes, to obtain a CDL Doubles/Triples endorsement in Alabama, you must have previous experience driving combination vehicles and receive appropriate training for doubles/triples operation.
Alabama state law requires you to have one year of experience operating a commercial motor vehicle with a valid CDL before you can apply for a Doubles/Triples endorsement. Additionally, the state requires you to pass a written test on doubles/triples operation and a skills test that involves driving a combination vehicle with doubles or triples attached.
It is important to note that operating combination vehicles with doubles or triples attached can be more challenging than driving single commercial vehicles, and it is highly recommended that you receive additional training specific to doubles/triples operation before attempting the CDL Doubles/Triples endorsement tests. This training can be obtained through commercial driving schools, trucking companies, or other recognized training programs.
Alabama state law requires you to have one year of experience operating a commercial motor vehicle with a valid CDL before you can apply for a Doubles/Triples endorsement. Additionally, the state requires you to pass a written test on doubles/triples operation and a skills test that involves driving a combination vehicle with doubles or triples attached.
It is important to note that operating combination vehicles with doubles or triples attached can be more challenging than driving single commercial vehicles, and it is highly recommended that you receive additional training specific to doubles/triples operation before attempting the CDL Doubles/Triples endorsement tests. This training can be obtained through commercial driving schools, trucking companies, or other recognized training programs.
Yes, to obtain a CDL Doubles/Triples endorsement in Alabama, you must pass an additional written test on doubles/triples operation.
The doubles/triples endorsement test covers topics such as:
- Coupling and uncoupling of doubles/triples
- Inspecting doubles/triples
- Checking air brakes
- Checking electrical and safety equipment
- Driving techniques specific to operating combination vehicles with doubles or triples attached
In addition to the doubles/triples endorsement test, you must also pass the general knowledge test and any other required endorsement tests (such as the hazardous materials endorsement) before you can obtain your CDL Doubles/Triples license.
It is important to study and prepare thoroughly for the doubles/triples endorsement test, as it is specific to operating combination vehicles and requires additional knowledge beyond the general CDL knowledge exam. You can find study materials and resources on the Alabama Department of Public Safety website or through commercial driving schools or training programs.
The doubles/triples endorsement test covers topics such as:
- Coupling and uncoupling of doubles/triples
- Inspecting doubles/triples
- Checking air brakes
- Checking electrical and safety equipment
- Driving techniques specific to operating combination vehicles with doubles or triples attached
In addition to the doubles/triples endorsement test, you must also pass the general knowledge test and any other required endorsement tests (such as the hazardous materials endorsement) before you can obtain your CDL Doubles/Triples license.
It is important to study and prepare thoroughly for the doubles/triples endorsement test, as it is specific to operating combination vehicles and requires additional knowledge beyond the general CDL knowledge exam. You can find study materials and resources on the Alabama Department of Public Safety website or through commercial driving schools or training programs.
To obtain a CDL Doubles/Triples endorsement in Alabama, you must pass a skills test that involves driving a combination vehicle with doubles or triples attached. During the test, you will need to demonstrate specific skills and maneuvers, including:
1. Pre-trip inspection: You will need to conduct a thorough inspection of your vehicle, including the coupling and uncoupling of doubles or triples.
2. Straight line backing: You will need to back the combination vehicle in a straight line for a specific distance.
3. Off-set backing: You will need to back the combination vehicle into a space that is offset to the left or right.
4. Alley docking: You will need to back the combination vehicle into an alley that is narrower than the vehicle itself.
5. Coupling and uncoupling of doubles/triples: You will need to demonstrate proper coupling and uncoupling procedures when attaching or detaching doubles or triples.
6. Driving skills: You will need to demonstrate safe driving skills specific to operating combination vehicles with doubles or triples attached, such as maintaining proper following distance, turning safely, and changing lanes correctly.
It is important to note that the skills test for the Doubles/Triples endorsement is more complex than the standard CDL skills test and requires additional knowledge and experience in operating combination vehicles. It is highly recommended that you receive additional training specific to doubles/triples operation before attempting the CDL Doubles/Triples endorsement test.
1. Pre-trip inspection: You will need to conduct a thorough inspection of your vehicle, including the coupling and uncoupling of doubles or triples.
2. Straight line backing: You will need to back the combination vehicle in a straight line for a specific distance.
3. Off-set backing: You will need to back the combination vehicle into a space that is offset to the left or right.
4. Alley docking: You will need to back the combination vehicle into an alley that is narrower than the vehicle itself.
5. Coupling and uncoupling of doubles/triples: You will need to demonstrate proper coupling and uncoupling procedures when attaching or detaching doubles or triples.
6. Driving skills: You will need to demonstrate safe driving skills specific to operating combination vehicles with doubles or triples attached, such as maintaining proper following distance, turning safely, and changing lanes correctly.
It is important to note that the skills test for the Doubles/Triples endorsement is more complex than the standard CDL skills test and requires additional knowledge and experience in operating combination vehicles. It is highly recommended that you receive additional training specific to doubles/triples operation before attempting the CDL Doubles/Triples endorsement test.
No, you cannot legally operate double/triple trailers without a CDL Doubles/Triples endorsement in Alabama.
The Federal Motor Carrier Safety Administration (FMCSA) requires drivers to have a CDL Doubles/Triples endorsement in order to operate combination vehicles with doubles or triples attached. This endorsement is required for any commercial motor vehicle that has more than one trailer or semi-trailer attached to it.
Driving a combination vehicle with doubles or triples attached requires additional knowledge and skills beyond those required for a standard commercial driver's license. The Doubles/Triples endorsement test covers topics such as coupling and uncoupling, inspecting doubles and triples, and driving techniques specific to combination vehicles with doubles or triples attached.
If you are caught operating a combination vehicle with doubles or triples attached without a CDL Doubles/Triples endorsement, you could face fines and other penalties. It is important to obtain the proper endorsements and training before operating any commercial motor vehicle.
The Federal Motor Carrier Safety Administration (FMCSA) requires drivers to have a CDL Doubles/Triples endorsement in order to operate combination vehicles with doubles or triples attached. This endorsement is required for any commercial motor vehicle that has more than one trailer or semi-trailer attached to it.
Driving a combination vehicle with doubles or triples attached requires additional knowledge and skills beyond those required for a standard commercial driver's license. The Doubles/Triples endorsement test covers topics such as coupling and uncoupling, inspecting doubles and triples, and driving techniques specific to combination vehicles with doubles or triples attached.
If you are caught operating a combination vehicle with doubles or triples attached without a CDL Doubles/Triples endorsement, you could face fines and other penalties. It is important to obtain the proper endorsements and training before operating any commercial motor vehicle.
You can add the CDL Doubles/Triples endorsement to your existing CDL license in Alabama by passing the required skills test and paying the endorsement fee. You do not need to apply for a new license.
To add the endorsement, you will need to pass both a written knowledge test and a skills test specific to combination vehicles with doubles or triples attached. Once you have passed both tests, you will need to pay the fee for the endorsement and it will be added to your existing CDL license.
It is important to note that you must have a valid CDL and meet all other requirements for obtaining a Doubles/Triples endorsement before you can take the tests. Additionally, you may need additional training specific to doubles/triples operation before attempting the CDL Doubles/Triples endorsement test.
Overall, adding a Doubles/Triples endorsement to your existing CDL license may be a more efficient option than applying for a new license, but it requires passing additional tests and meeting specific requirements.
To add the endorsement, you will need to pass both a written knowledge test and a skills test specific to combination vehicles with doubles or triples attached. Once you have passed both tests, you will need to pay the fee for the endorsement and it will be added to your existing CDL license.
It is important to note that you must have a valid CDL and meet all other requirements for obtaining a Doubles/Triples endorsement before you can take the tests. Additionally, you may need additional training specific to doubles/triples operation before attempting the CDL Doubles/Triples endorsement test.
Overall, adding a Doubles/Triples endorsement to your existing CDL license may be a more efficient option than applying for a new license, but it requires passing additional tests and meeting specific requirements.
Yes, drivers with a CDL Doubles/Triples endorsement are subject to certain restrictions and limitations in Alabama.
One of the main restrictions is related to the length and weight of the combination vehicle. In Alabama, the maximum length for a combination vehicle with doubles or triples is 28 feet for each trailer, and the maximum weight is 80,000 pounds total. Drivers with a Doubles/Triples endorsement must adhere to these limits when operating these types of vehicles.
Another restriction is related to driving on certain roads and highways. Some roads and highways are designated as off-limits for combination vehicles with doubles or triples. Drivers with a Doubles/Triples endorsement must be aware of these restrictions and plan their routes accordingly.
It is also important to note that operating a combination vehicle with doubles or triples attached requires additional skills and knowledge beyond those required for a standard commercial driver's license. Drivers with a Doubles/Triples endorsement must be proficient in areas such as coupling and uncoupling, inspecting doubles and triples, and driving techniques specific to combination vehicles.
Overall, while a CDL Doubles/Triples endorsement allows drivers to operate combination vehicles with doubles or triples attached, there are restrictions and limitations that must be followed in Alabama.
One of the main restrictions is related to the length and weight of the combination vehicle. In Alabama, the maximum length for a combination vehicle with doubles or triples is 28 feet for each trailer, and the maximum weight is 80,000 pounds total. Drivers with a Doubles/Triples endorsement must adhere to these limits when operating these types of vehicles.
Another restriction is related to driving on certain roads and highways. Some roads and highways are designated as off-limits for combination vehicles with doubles or triples. Drivers with a Doubles/Triples endorsement must be aware of these restrictions and plan their routes accordingly.
It is also important to note that operating a combination vehicle with doubles or triples attached requires additional skills and knowledge beyond those required for a standard commercial driver's license. Drivers with a Doubles/Triples endorsement must be proficient in areas such as coupling and uncoupling, inspecting doubles and triples, and driving techniques specific to combination vehicles.
Overall, while a CDL Doubles/Triples endorsement allows drivers to operate combination vehicles with doubles or triples attached, there are restrictions and limitations that must be followed in Alabama.
In Alabama, the maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement are as follows:
- The maximum weight for a combination vehicle with doubles or triples is 80,000 pounds total.
- The maximum length for a combination vehicle with doubles or triples is 28 feet for each trailer.
It is important to note that these weight and length limits may vary by state, and drivers with a CDL Doubles/Triples endorsement must comply with the specific regulations of the state in which they are operating. Additionally, drivers with a Doubles/Triples endorsement must be aware of any additional restrictions or limitations related to driving on certain roads and highways.
- The maximum weight for a combination vehicle with doubles or triples is 80,000 pounds total.
- The maximum length for a combination vehicle with doubles or triples is 28 feet for each trailer.
It is important to note that these weight and length limits may vary by state, and drivers with a CDL Doubles/Triples endorsement must comply with the specific regulations of the state in which they are operating. Additionally, drivers with a Doubles/Triples endorsement must be aware of any additional restrictions or limitations related to driving on certain roads and highways.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement. Here are some of the key requirements and guidelines:
1. Extra training: Drivers with a CDL Doubles/Triples endorsement must complete additional training beyond the standard commercial driver's license requirements. This includes training on coupling and uncoupling, inspecting doubles/triples, and safe driving techniques for combination vehicles.
2. Inspections: Drivers must inspect the coupling mechanism, safety chains, tires, brakes, and lighting systems of each trailer before driving.
3. Speed limits: In general, drivers should drive at a speed that is appropriate for the road conditions and traffic flow. However, some states may have lower speed limits for combination vehicles with doubles/triples.
4. Braking distances: Combination vehicles with doubles/triples require longer stopping distances than single vehicles. Drivers should maintain a safe following distance and allow extra time to brake.
5. Turning: Combination vehicles with doubles/triples have a wider turning radius than single vehicles. Drivers should use caution when turning and be aware of their surroundings.
6. Lane changes: Drivers should use extra caution when changing lanes with a combination vehicle, as the longer length can make it more difficult to see other vehicles.
7. Road restrictions: Some roads or highways may be off-limits for combination vehicles with doubles/triples. Drivers should plan their routes carefully to avoid these restrictions.
Overall, drivers with a CDL Doubles/Triples endorsement must be well-trained and experienced in order to operate combination vehicles safely and effectively. They must also be aware of the specific regulations and safety considerations that apply to their driving situation in order to avoid accidents or other issues on the road.
1. Extra training: Drivers with a CDL Doubles/Triples endorsement must complete additional training beyond the standard commercial driver's license requirements. This includes training on coupling and uncoupling, inspecting doubles/triples, and safe driving techniques for combination vehicles.
2. Inspections: Drivers must inspect the coupling mechanism, safety chains, tires, brakes, and lighting systems of each trailer before driving.
3. Speed limits: In general, drivers should drive at a speed that is appropriate for the road conditions and traffic flow. However, some states may have lower speed limits for combination vehicles with doubles/triples.
4. Braking distances: Combination vehicles with doubles/triples require longer stopping distances than single vehicles. Drivers should maintain a safe following distance and allow extra time to brake.
5. Turning: Combination vehicles with doubles/triples have a wider turning radius than single vehicles. Drivers should use caution when turning and be aware of their surroundings.
6. Lane changes: Drivers should use extra caution when changing lanes with a combination vehicle, as the longer length can make it more difficult to see other vehicles.
7. Road restrictions: Some roads or highways may be off-limits for combination vehicles with doubles/triples. Drivers should plan their routes carefully to avoid these restrictions.
Overall, drivers with a CDL Doubles/Triples endorsement must be well-trained and experienced in order to operate combination vehicles safely and effectively. They must also be aware of the specific regulations and safety considerations that apply to their driving situation in order to avoid accidents or other issues on the road.
