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 Mississippi Professional Driver’s Manual. Questions come from chapters covering: Driving Safely, Transporting Cargo 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 carrying a wide load, the driver should:
Explanation
Special permits are required for over-length, over-width, and/or overweight loads. They may also be subject to certain driving restrictions.
9. Brake linings should be:
Explanation
Brake linings should not be loose or soaked with oil or grease. They shouldn't be dangerously thin.
10. In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:
Explanation
In vehicles equipped with an automatic tractor protection valve, the valve will pop out if air pressure drops to a level between 20 and 45 psi. When the valve pops out, the protection valve will close, stopping the flow of air.
11. When driving a vehicle equipped with an Anti-Lock Braking System (ABS), you should:
Explanation
When driving a tractor-trailer combination that is equipped with an Anti-Lock Braking System (ABS), you should brake in the same manner that you would if the vehicle was not equipped with ABS.
12. Rough acceleration:
Explanation
When accelerating, speed up smoothly and gradually so the vehicle does not jerk. Rough acceleration can cause mechanical damage.
13. If you plan to slow down, you can warn drivers behind you by:
Explanation
Before slowing down, it is a good idea to flash your brake lights by lightly tapping your brake pedal a few times. This will warn drivers behind you of your plans to slow down.
14. Before coupling, you can secure a second trailer by:
Explanation
If you are attaching a second trailer to a combination but you have doubts about the trailer's brakes, you should use wheel chocks to secure the trailer in place while coupling.
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Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Mississippi, you will need to follow these steps:
1. Obtain a Mississippi Commercial Driver's License (CDL) by passing the CDL knowledge and skills tests.
2. Study the Mississippi CDL Manual and become familiar with the information related to doubles/triples.
3. Schedule an appointment with your local Mississippi Department of Public Safety (DPS) driver license office to take the doubles/triples endorsement test.
4. Bring your current Mississippi CDL and any required documentation to the appointment.
5. Pay the required fee for the endorsement test.
6. Pass the doubles/triples endorsement test with a score of at least 80%.
7. Wait for your updated CDL with the doubles/triples endorsement to arrive in the mail.
It is important to note that you must already have your CDL before applying for a doubles/triples endorsement, and you must pass a knowledge test specific to doubles/triples operations in addition to any other applicable knowledge tests.
1. Obtain a Mississippi Commercial Driver's License (CDL) by passing the CDL knowledge and skills tests.
2. Study the Mississippi CDL Manual and become familiar with the information related to doubles/triples.
3. Schedule an appointment with your local Mississippi Department of Public Safety (DPS) driver license office to take the doubles/triples endorsement test.
4. Bring your current Mississippi CDL and any required documentation to the appointment.
5. Pay the required fee for the endorsement test.
6. Pass the doubles/triples endorsement test with a score of at least 80%.
7. Wait for your updated CDL with the doubles/triples endorsement to arrive in the mail.
It is important to note that you must already have your CDL before applying for a doubles/triples endorsement, and you must pass a knowledge test specific to doubles/triples operations in addition to any other applicable knowledge tests.
To get a CDL Doubles/Triples license in Mississippi, you must meet the following requirements:
1. Be at least 21 years of age.
2. Hold a valid Mississippi CDL.
3. Pass the Mississippi CDL Doubles/Triples knowledge test.
4. Pass a driving test in a vehicle that has doubles/triples trailers.
5. Provide proof of citizenship or lawful permanent residency in the United States.
6. Provide proof of your Social Security number.
7. Have a valid DOT medical certificate.
8. Pay the required fees.
It is important to note that you must already have your CDL before applying for a doubles/triples endorsement, and you must pass a knowledge test specific to doubles/triples operations in addition to any other applicable knowledge tests. Additionally, some employers may have their own additional requirements for drivers operating doubles/triples vehicles.
1. Be at least 21 years of age.
2. Hold a valid Mississippi CDL.
3. Pass the Mississippi CDL Doubles/Triples knowledge test.
4. Pass a driving test in a vehicle that has doubles/triples trailers.
5. Provide proof of citizenship or lawful permanent residency in the United States.
6. Provide proof of your Social Security number.
7. Have a valid DOT medical certificate.
8. Pay the required fees.
It is important to note that you must already have your CDL before applying for a doubles/triples endorsement, and you must pass a knowledge test specific to doubles/triples operations in addition to any other applicable knowledge tests. Additionally, some employers may have their own additional requirements for drivers operating doubles/triples vehicles.
Mississippi does not have a specific requirement for training or experience to obtain a CDL Doubles/Triples endorsement. However, it is highly recommended that you receive specialized training in operating doubles/triples trailers before attempting to take the endorsement test. This will help ensure that you have the necessary skills and knowledge to safely operate these larger and more complex vehicles.
Additionally, some employers may require or prefer that applicants have prior experience operating doubles/triples trailers. It is important to check with your potential employers about their specific requirements before pursuing this endorsement.
Additionally, some employers may require or prefer that applicants have prior experience operating doubles/triples trailers. It is important to check with your potential employers about their specific requirements before pursuing this endorsement.
Yes, to obtain a CDL Doubles/Triples endorsement in Mississippi, you must pass an additional written test specific to doubles/triples trailers. This test covers topics such as:
1. Inspecting double/triple trailers
2. Coupling and uncoupling double/triple trailers
3. Driving double/triple trailers
4. Checking air brakes on double/triple trailers
The test will consist of multiple-choice questions, and you must answer at least 80% of the questions correctly to pass.
It is important to note that you must already have a valid CDL before applying for a doubles/triples endorsement and taking the additional written test.
1. Inspecting double/triple trailers
2. Coupling and uncoupling double/triple trailers
3. Driving double/triple trailers
4. Checking air brakes on double/triple trailers
The test will consist of multiple-choice questions, and you must answer at least 80% of the questions correctly to pass.
It is important to note that you must already have a valid CDL before applying for a doubles/triples endorsement and taking the additional written test.
In Mississippi, the CDL Doubles/Triples endorsement test includes a skills test that you must pass in addition to the written test. During the skills test, you will need to demonstrate your ability to:
1. Inspect the double/triple trailer: You will be asked to inspect the trailer for safety, making sure all parts are in good working order.
2. Couple and uncouple the double/triple trailer: You will need to show that you can properly connect and disconnect the double/triple trailer from the tractor.
3. Navigate turns and curves: You will need to show that you can safely navigate turns and curves while driving with a double/triple trailer.
4. Back up: You will need to show that you can safely back up the double/triple trailer into a designated area.
5. Drive on the road: You will need to demonstrate your ability to drive safely on the road with a double/triple trailer.
It is important to note that these are just general guidelines for what you can expect during the skills test. The exact maneuvers and skills required may vary depending on the testing location and examiner.
1. Inspect the double/triple trailer: You will be asked to inspect the trailer for safety, making sure all parts are in good working order.
2. Couple and uncouple the double/triple trailer: You will need to show that you can properly connect and disconnect the double/triple trailer from the tractor.
3. Navigate turns and curves: You will need to show that you can safely navigate turns and curves while driving with a double/triple trailer.
4. Back up: You will need to show that you can safely back up the double/triple trailer into a designated area.
5. Drive on the road: You will need to demonstrate your ability to drive safely on the road with a double/triple trailer.
It is important to note that these are just general guidelines for what you can expect during the skills test. The exact maneuvers and skills required may vary depending on the testing location and examiner.
No, you cannot legally operate a double/triple trailer without a CDL Doubles/Triples endorsement in Mississippi. To operate a commercial vehicle with a double/triple trailer, you must first obtain a CDL and then pass the additional written and skills tests required for the Doubles/Triples endorsement.
Driving a double/triple trailer requires additional skills and knowledge compared to driving a single trailer. The Doubles/Triples endorsement is designed to ensure that drivers have the necessary skills and knowledge to safely operate these vehicles on the road.
Driving a commercial vehicle without the proper license and endorsements is illegal and can result in fines, penalties, and even loss of driving privileges. It is important to obtain all necessary endorsements before operating any commercial vehicle.
Driving a double/triple trailer requires additional skills and knowledge compared to driving a single trailer. The Doubles/Triples endorsement is designed to ensure that drivers have the necessary skills and knowledge to safely operate these vehicles on the road.
Driving a commercial vehicle without the proper license and endorsements is illegal and can result in fines, penalties, and even loss of driving privileges. It is important to obtain all necessary endorsements before operating any commercial vehicle.
In Mississippi, you can add the CDL Doubles/Triples endorsement to your existing CDL license. You will need to pass the written test and the skills test for the Doubles/Triples endorsement, and then pay the required fee to add the endorsement to your CDL license.
To add an endorsement to your CDL license, you will need to visit a Mississippi Department of Public Safety (DPS) office and bring the following documents:
1. Your current CDL license
2. Your Social Security card
3. Proof of residency (e.g., utility bill, bank statement)
4. Medical certification
5. Payment for the required fee
Once you have passed the required tests and paid the fee, the endorsement will be added to your CDL license and you will be legally authorized to operate a double/triple trailer.
To add an endorsement to your CDL license, you will need to visit a Mississippi Department of Public Safety (DPS) office and bring the following documents:
1. Your current CDL license
2. Your Social Security card
3. Proof of residency (e.g., utility bill, bank statement)
4. Medical certification
5. Payment for the required fee
Once you have passed the required tests and paid the fee, the endorsement will be added to your CDL license and you will be legally authorized to operate a double/triple trailer.
Yes, there are certain restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Mississippi. Here are some of the restrictions and limitations:
1. Combination of Vehicles: With a Doubles/Triples endorsement, you are authorized to operate a combination of vehicles that includes two or three trailers. However, the total weight of the combination cannot exceed 80,000 pounds.
2. Length Restrictions: The maximum length of each trailer is 28 feet, and the maximum overall length of the combination cannot exceed 65 feet.
3. Special Skills: Operating double/triple trailers requires special skills and knowledge. It is important to be aware of the unique handling characteristics of these combinations, such as increased stopping distance, reduced maneuverability, and wider turns.
4. Endorsement Renewal: The Doubles/Triples endorsement must be renewed every four years along with your CDL license.
5. Endorsement Suspension/Revocation: Your Doubles/Triples endorsement can be suspended or revoked if you violate traffic laws or engage in unsafe driving practices.
It is important to obey these restrictions and limitations to ensure your safety and the safety of others on the road. Violating these restrictions can result in fines, penalties, and even loss of driving privileges.
1. Combination of Vehicles: With a Doubles/Triples endorsement, you are authorized to operate a combination of vehicles that includes two or three trailers. However, the total weight of the combination cannot exceed 80,000 pounds.
2. Length Restrictions: The maximum length of each trailer is 28 feet, and the maximum overall length of the combination cannot exceed 65 feet.
3. Special Skills: Operating double/triple trailers requires special skills and knowledge. It is important to be aware of the unique handling characteristics of these combinations, such as increased stopping distance, reduced maneuverability, and wider turns.
4. Endorsement Renewal: The Doubles/Triples endorsement must be renewed every four years along with your CDL license.
5. Endorsement Suspension/Revocation: Your Doubles/Triples endorsement can be suspended or revoked if you violate traffic laws or engage in unsafe driving practices.
It is important to obey these restrictions and limitations to ensure your safety and the safety of others on the road. Violating these restrictions can result in fines, penalties, and even loss of driving privileges.
In Mississippi, drivers with a CDL Doubles/Triples endorsement are authorized to operate a combination of vehicles that includes two or three trailers, but there are weight and length limits that must be followed. Here are the maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement in Mississippi:
1. Maximum Weight Limit: The total weight of the combination vehicle cannot exceed 80,000 pounds. This includes the weight of the tractor, trailers, cargo, and any other equipment or accessories.
2. Maximum Length Limit: The maximum length of each trailer is 28 feet. The maximum overall length of the combination vehicle cannot exceed 65 feet.
It is important to note that these limits apply specifically to double/triple trailers. If you are operating a different type of commercial vehicle, there may be different weight and length limits that apply. It is important to be aware of all applicable regulations and restrictions to ensure safe and legal operation of your commercial vehicle.
1. Maximum Weight Limit: The total weight of the combination vehicle cannot exceed 80,000 pounds. This includes the weight of the tractor, trailers, cargo, and any other equipment or accessories.
2. Maximum Length Limit: The maximum length of each trailer is 28 feet. The maximum overall length of the combination vehicle cannot exceed 65 feet.
It is important to note that these limits apply specifically to double/triple trailers. If you are operating a different type of commercial vehicle, there may be different weight and length limits that apply. It is important to be aware of all applicable regulations and restrictions to ensure safe and legal operation of your commercial vehicle.
Yes, there are specific safety considerations and regulations that apply to driving double/triple trailers with a CDL Doubles/Triples endorsement in Mississippi. Here are some of the key safety considerations and regulations:
1. Special Skills and Training: Operating a combination of vehicles that includes two or three trailers requires special skills and training. Drivers with a Doubles/Triples endorsement must demonstrate knowledge and competence in handling these longer, heavier vehicles.
2. Reduced Maneuverability: Double/triple trailers have reduced maneuverability compared to single trailers, especially when it comes to turning and backing up. Drivers must be aware of the unique handling characteristics of double/triple trailers and adjust their driving accordingly.
3. Increased Stopping Distance: Double/triple trailers require a longer stopping distance than single trailers due to their increased weight and momentum. Drivers must maintain a safe following distance and adjust their speed based on road conditions.
4. Coupling and Uncoupling: Drivers with a Doubles/Triples endorsement must be able to properly couple and uncouple the trailers in their combination vehicle. This includes inspecting the equipment, verifying that it is secure, and following proper procedures for connecting and disconnecting the trailers.
5. Pre-Trip Inspections: Drivers must perform pre-trip inspections before operating their combination vehicle, including checking the brakes, lights, tires, coupling devices, and other equipment.
6. Endorsement Renewal: The Doubles/Triples endorsement must be renewed every four years along with your CDL license.
7. Endorsement Suspension/Revocation: Your Doubles/Triples endorsement can be suspended or revoked if you violate traffic laws or engage in unsafe driving practices.
By following these safety considerations and regulations, drivers with a CDL Doubles/Triples endorsement can help ensure safe operation of their combination vehicle on the roadways of Mississippi.
1. Special Skills and Training: Operating a combination of vehicles that includes two or three trailers requires special skills and training. Drivers with a Doubles/Triples endorsement must demonstrate knowledge and competence in handling these longer, heavier vehicles.
2. Reduced Maneuverability: Double/triple trailers have reduced maneuverability compared to single trailers, especially when it comes to turning and backing up. Drivers must be aware of the unique handling characteristics of double/triple trailers and adjust their driving accordingly.
3. Increased Stopping Distance: Double/triple trailers require a longer stopping distance than single trailers due to their increased weight and momentum. Drivers must maintain a safe following distance and adjust their speed based on road conditions.
4. Coupling and Uncoupling: Drivers with a Doubles/Triples endorsement must be able to properly couple and uncouple the trailers in their combination vehicle. This includes inspecting the equipment, verifying that it is secure, and following proper procedures for connecting and disconnecting the trailers.
5. Pre-Trip Inspections: Drivers must perform pre-trip inspections before operating their combination vehicle, including checking the brakes, lights, tires, coupling devices, and other equipment.
6. Endorsement Renewal: The Doubles/Triples endorsement must be renewed every four years along with your CDL license.
7. Endorsement Suspension/Revocation: Your Doubles/Triples endorsement can be suspended or revoked if you violate traffic laws or engage in unsafe driving practices.
By following these safety considerations and regulations, drivers with a CDL Doubles/Triples endorsement can help ensure safe operation of their combination vehicle on the roadways of Mississippi.
