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 South Dakota 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. Air storage tanks:
Explanation
In an air brake system, the air storage tanks hold compressed air to be used by the brakes. The number and size of air tanks varies among vehicles.
9. When you need to stop in an emergency, you should:
Explanation
If you need to make an emergency stop, you can use either the controlled braking method or the stab braking method. It's important to brake in a way that keeps your vehicle traveling in a straight line while still allowing you to turn, if necessary.
10. When passing a row of parked vehicles, a driver should:
Explanation
You should be cautious when passing parked vehicles. A person may step out of a parked vehicle or out from between parked vehicles without looking for oncoming traffic. A driver may begin moving their vehicle before realizing you are there.
11. Using the brakes creates heat. If too much heat is produced:
Explanation
Brakes are designed to take a lot of heat, but drivers should not rely solely on the brakes to slow their vehicle. Brakes may fade and lose their ability to slow down the vehicle if they become too hot, so drivers should also rely on the engine braking effect.
12. Which of the following is not a possible cause of a fire?
Explanation
Possible causes of vehicle fires include spilled fuel or improper use of flares following an crash; under-inflated tires or dual tires that touch; short circuits in the electrical system; smoking around fuel; improper fueling or loose fuel connections; and carrying cargo that is flammable, improperly sealed or loaded, or poorly ventilated.
13. A tank endorsement is:
Explanation
Subject to certain conditions, a tank endorsement is required to operate a tank vehicle that is used to haul either liquids or gases.
14. A speed limit posted on a curve:
Explanation
A posted speed on a curve may be safe to be driven when operating a straight truck or a single-trailer combination but unsafe to be driven in a double or triple.
Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in South Dakota, you must follow these steps:
1. Obtain a South Dakota CDL: You must have a valid South Dakota commercial driver's license (CDL) before you can apply for the Doubles/Triples endorsement.
2. Study the CDL manual: The South Dakota CDL manual contains all the information you need to know to pass the Doubles/Triples endorsement test. Study the manual thoroughly to ensure that you understand all the rules, regulations, and safety requirements for driving doubles and triples.
3. Schedule a knowledge test appointment: Contact your local South Dakota Driver Licensing Office to schedule an appointment for your Doubles/Triples endorsement knowledge test.
4. Take the knowledge test: On the day of your appointment, take the Doubles/Triples endorsement knowledge test. You must answer at least 80% of the questions correctly to pass.
5. Pay the fee: If you pass the knowledge test, you will need to pay a fee for the endorsement.
6. Schedule a skills test appointment: Once you have passed the knowledge test and paid the fee, contact your local South Dakota Driver Licensing Office to schedule an appointment for your Doubles/Triples endorsement skills test.
7. Take the skills test: On the day of your appointment, take the Doubles/Triples endorsement skills test. This will involve driving a vehicle with doubles or triples attached and demonstrating your ability to safely handle these types of loads.
8. Receive your endorsement: If you pass the skills test, you will receive your CDL Doubles/Triples endorsement, which will be added to your South Dakota commercial driver's license.
It's important to note that if you are already employed as a commercial driver, your employer may require additional training or endorsements beyond what is required by law. Be sure to check with your employer before beginning the process of obtaining a CDL Doubles/Triples endorsement.
1. Obtain a South Dakota CDL: You must have a valid South Dakota commercial driver's license (CDL) before you can apply for the Doubles/Triples endorsement.
2. Study the CDL manual: The South Dakota CDL manual contains all the information you need to know to pass the Doubles/Triples endorsement test. Study the manual thoroughly to ensure that you understand all the rules, regulations, and safety requirements for driving doubles and triples.
3. Schedule a knowledge test appointment: Contact your local South Dakota Driver Licensing Office to schedule an appointment for your Doubles/Triples endorsement knowledge test.
4. Take the knowledge test: On the day of your appointment, take the Doubles/Triples endorsement knowledge test. You must answer at least 80% of the questions correctly to pass.
5. Pay the fee: If you pass the knowledge test, you will need to pay a fee for the endorsement.
6. Schedule a skills test appointment: Once you have passed the knowledge test and paid the fee, contact your local South Dakota Driver Licensing Office to schedule an appointment for your Doubles/Triples endorsement skills test.
7. Take the skills test: On the day of your appointment, take the Doubles/Triples endorsement skills test. This will involve driving a vehicle with doubles or triples attached and demonstrating your ability to safely handle these types of loads.
8. Receive your endorsement: If you pass the skills test, you will receive your CDL Doubles/Triples endorsement, which will be added to your South Dakota commercial driver's license.
It's important to note that if you are already employed as a commercial driver, your employer may require additional training or endorsements beyond what is required by law. Be sure to check with your employer before beginning the process of obtaining a CDL Doubles/Triples endorsement.
To get a CDL Doubles/Triples license in South Dakota, you must meet the following requirements:
1. Age: You must be at least 18 years old to drive intrastate (within South Dakota) and 21 years old to drive interstate (across state lines) with a CDL Doubles/Triples license.
2. Valid CDL: You must have a valid South Dakota commercial driver's license (CDL) to apply for the Doubles/Triples endorsement.
3. Clean driving record: You must have a clean driving record with no serious traffic violations or DUI convictions in the past three years.
4. Medical certification: You must pass a medical examination and be certified by the Department of Transportation (DOT) to operate commercial vehicles.
5. Pass a knowledge test: You must pass a knowledge test on the rules and regulations for driving doubles and triples.
6. Pass a skills test: You must pass a skills test that demonstrates your ability to safely operate a commercial vehicle with doubles or triples attached.
Additionally, you may be required to complete additional training or obtain other endorsements before you can apply for a CDL Doubles/Triples license, depending on your employer's requirements or the type of load you will be transporting.
1. Age: You must be at least 18 years old to drive intrastate (within South Dakota) and 21 years old to drive interstate (across state lines) with a CDL Doubles/Triples license.
2. Valid CDL: You must have a valid South Dakota commercial driver's license (CDL) to apply for the Doubles/Triples endorsement.
3. Clean driving record: You must have a clean driving record with no serious traffic violations or DUI convictions in the past three years.
4. Medical certification: You must pass a medical examination and be certified by the Department of Transportation (DOT) to operate commercial vehicles.
5. Pass a knowledge test: You must pass a knowledge test on the rules and regulations for driving doubles and triples.
6. Pass a skills test: You must pass a skills test that demonstrates your ability to safely operate a commercial vehicle with doubles or triples attached.
Additionally, you may be required to complete additional training or obtain other endorsements before you can apply for a CDL Doubles/Triples license, depending on your employer's requirements or the type of load you will be transporting.
In South Dakota, there are no specific experience or training requirements to obtain a CDL Doubles/Triples endorsement. However, it's highly recommended that you have experience driving commercial vehicles with large loads before attempting to obtain this endorsement.
Additionally, some employers may require additional training or endorsements beyond what is required by law to operate doubles and triples. For example, some employers may require that you complete a specialized training program or obtain a HazMat endorsement before you can operate a vehicle with doubles or triples.
It's important to check with your employer or potential employers to determine their specific requirements and ensure that you have the necessary training and endorsements to operate the types of vehicles and loads that you will be responsible for.
Additionally, some employers may require additional training or endorsements beyond what is required by law to operate doubles and triples. For example, some employers may require that you complete a specialized training program or obtain a HazMat endorsement before you can operate a vehicle with doubles or triples.
It's important to check with your employer or potential employers to determine their specific requirements and ensure that you have the necessary training and endorsements to operate the types of vehicles and loads that you will be responsible for.
Yes, to obtain a CDL Doubles/Triples endorsement in South Dakota, you will need to pass an additional written test. This test will cover the specific rules and regulations for driving vehicles with multiple trailers.
The doubles/triples endorsement test will cover topics such as:
- Coupling and uncoupling procedures
- Inspecting double/triple trailers
- Safe driving practices when operating double/triple trailers
- Handling and maneuvering double/triple trailers
- Emergency procedures when driving double/triple trailers
You will need to score at least 80% on the test to pass and obtain the doubles/triples endorsement. It's important to study the South Dakota CDL manual thoroughly and take practice tests to ensure that you are prepared for the exam.
The doubles/triples endorsement test will cover topics such as:
- Coupling and uncoupling procedures
- Inspecting double/triple trailers
- Safe driving practices when operating double/triple trailers
- Handling and maneuvering double/triple trailers
- Emergency procedures when driving double/triple trailers
You will need to score at least 80% on the test to pass and obtain the doubles/triples endorsement. It's important to study the South Dakota CDL manual thoroughly and take practice tests to ensure that you are prepared for the exam.
In South Dakota, the CDL Doubles/Triples endorsement test consists of a written exam and a skills test. The skills test will assess your ability to safely operate vehicles with multiple trailers.
During the skills test, you will be required to demonstrate the following maneuvers:
1. Pre-trip inspection: You will need to perform a thorough inspection of the vehicle, including all trailers and coupling devices.
2. Coupling and uncoupling: You will need to show that you can properly couple and uncouple the trailers.
3. Straight-line backing: You will be asked to back up your vehicle in a straight line for a specified distance.
4. Offset backing: You will be asked to back up your vehicle into a space that is offset from your starting position.
5. Alley docking: You will be asked to maneuver your vehicle into an alley-like space between two barriers.
6. Road driving: You will be asked to drive your vehicle on public roads while demonstrating safe driving practices with multiple trailers.
It's important to practice these maneuvers before taking the skills test, as they require precision and skill. Additionally, it's important to follow all safety procedures and regulations during the test.
During the skills test, you will be required to demonstrate the following maneuvers:
1. Pre-trip inspection: You will need to perform a thorough inspection of the vehicle, including all trailers and coupling devices.
2. Coupling and uncoupling: You will need to show that you can properly couple and uncouple the trailers.
3. Straight-line backing: You will be asked to back up your vehicle in a straight line for a specified distance.
4. Offset backing: You will be asked to back up your vehicle into a space that is offset from your starting position.
5. Alley docking: You will be asked to maneuver your vehicle into an alley-like space between two barriers.
6. Road driving: You will be asked to drive your vehicle on public roads while demonstrating safe driving practices with multiple trailers.
It's important to practice these maneuvers before taking the skills test, as they require precision and skill. Additionally, it's important to follow all safety procedures and regulations during the test.
No, in South Dakota, you are required to have a CDL Doubles/Triples endorsement to operate vehicles with multiple trailers. The endorsement is required for any combination of vehicles that consists of a tractor-trailer pulling two or more trailers.
If you operate double/triple trailers without the proper endorsement, you could face fines, penalties, and even the suspension or revocation of your CDL. Additionally, operating these vehicles without the proper training and knowledge could result in accidents, injuries, and fatalities.
It's important to take the necessary steps to obtain the proper endorsements before operating any commercial vehicle. This includes studying the South Dakota CDL manual and passing the required written and skills tests.
If you operate double/triple trailers without the proper endorsement, you could face fines, penalties, and even the suspension or revocation of your CDL. Additionally, operating these vehicles without the proper training and knowledge could result in accidents, injuries, and fatalities.
It's important to take the necessary steps to obtain the proper endorsements before operating any commercial vehicle. This includes studying the South Dakota CDL manual and passing the required written and skills tests.
You can add the CDL Doubles/Triples endorsement to your existing CDL license in South Dakota. To add the endorsement, you will need to pass a written exam and a skills test specific to the endorsement.
To add the endorsement, you can visit a South Dakota driver exam station or authorized third-party tester and provide the necessary documentation, such as your current CDL license and proof of passing the written exam. You will then need to pass the skills test for the Doubles/Triples endorsement.
Once you have passed both tests, your CDL license will be updated to include the Doubles/Triples endorsement. There may be additional fees associated with adding the endorsement to your CDL license.
It's important to note that if your CDL license is nearing expiration, you may need to renew your license before adding the endorsement. Additionally, if you have any restrictions on your CDL license, such as a vision restriction, you may need to have those restrictions removed before adding the endorsement.
To add the endorsement, you can visit a South Dakota driver exam station or authorized third-party tester and provide the necessary documentation, such as your current CDL license and proof of passing the written exam. You will then need to pass the skills test for the Doubles/Triples endorsement.
Once you have passed both tests, your CDL license will be updated to include the Doubles/Triples endorsement. There may be additional fees associated with adding the endorsement to your CDL license.
It's important to note that if your CDL license is nearing expiration, you may need to renew your license before adding the endorsement. Additionally, if you have any restrictions on your CDL license, such as a vision restriction, you may need to have those restrictions removed before adding the endorsement.
Yes, there are some restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in South Dakota. These restrictions are put in place to ensure the safety of the driver, other motorists, and pedestrians.
Here are some of the restrictions and limitations for drivers with a Doubles/Triples endorsement:
1. Maximum length: The total length of the combination of vehicles may not exceed 110 feet.
2. Maximum weight: The maximum weight of the combination of vehicles may not exceed 80,000 pounds.
3. Maximum number of trailers: The maximum number of trailers that can be towed is two.
4. Special driving skills: Drivers with a Doubles/Triples endorsement must have special driving skills and knowledge to operate these vehicles safely on the road.
5. Special equipment requirements: Vehicles with multiple trailers require additional safety equipment, such as additional mirrors and lighting.
It's important for drivers with a Doubles/Triples endorsement to understand and follow these restrictions and limitations to ensure their safety and the safety of others on the road. Violating these restrictions could result in fines, penalties, or even the suspension or revocation of their CDL license.
Here are some of the restrictions and limitations for drivers with a Doubles/Triples endorsement:
1. Maximum length: The total length of the combination of vehicles may not exceed 110 feet.
2. Maximum weight: The maximum weight of the combination of vehicles may not exceed 80,000 pounds.
3. Maximum number of trailers: The maximum number of trailers that can be towed is two.
4. Special driving skills: Drivers with a Doubles/Triples endorsement must have special driving skills and knowledge to operate these vehicles safely on the road.
5. Special equipment requirements: Vehicles with multiple trailers require additional safety equipment, such as additional mirrors and lighting.
It's important for drivers with a Doubles/Triples endorsement to understand and follow these restrictions and limitations to ensure their safety and the safety of others on the road. Violating these restrictions could result in fines, penalties, or even the suspension or revocation of their CDL license.
In South Dakota, drivers with a CDL Doubles/Triples endorsement are subject to certain weight and length limits when operating double/triple trailers. These limits are in place to ensure the safety of the driver, other motorists, and pedestrians.
Here are the maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement in South Dakota:
1. Maximum length: The total length of the combination of vehicles may not exceed 110 feet.
2. Maximum weight: The maximum weight of the combination of vehicles may not exceed 80,000 pounds.
It's important to note that these limits apply to the combination of vehicles, including the tractor and trailers. Drivers must also ensure that each trailer in the combination is properly attached and secured.
Additionally, drivers with a Doubles/Triples endorsement must have special driving skills and knowledge to operate these vehicles safely on the road. They must also follow all traffic laws and regulations, including special equipment requirements for vehicles with multiple trailers.
Violating these weight and length limits could result in fines, penalties, or even the suspension or revocation of their CDL license.
Here are the maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement in South Dakota:
1. Maximum length: The total length of the combination of vehicles may not exceed 110 feet.
2. Maximum weight: The maximum weight of the combination of vehicles may not exceed 80,000 pounds.
It's important to note that these limits apply to the combination of vehicles, including the tractor and trailers. Drivers must also ensure that each trailer in the combination is properly attached and secured.
Additionally, drivers with a Doubles/Triples endorsement must have special driving skills and knowledge to operate these vehicles safely on the road. They must also follow all traffic laws and regulations, including special equipment requirements for vehicles with multiple trailers.
Violating these weight and length limits could result in fines, penalties, or even the 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 South Dakota. These regulations are in place to ensure the safety of the driver, other motorists, and pedestrians on the road.
Here are some of the important safety considerations and regulations that drivers with a CDL Doubles/Triples endorsement should be aware of:
1. Special driving skills: Drivers with a Doubles/Triples endorsement must have special driving skills and knowledge to operate these vehicles safely on the road. They must be able to maneuver the combination of vehicles in tight spaces, such as when backing up or turning.
2. Additional equipment requirements: Vehicles with multiple trailers require additional safety equipment, such as additional mirrors and lighting. Drivers must ensure that all required equipment is properly installed and functioning before operating the vehicle.
3. Weight distribution: Drivers must ensure that the weight of the cargo is distributed evenly between the trailers to prevent instability and unsafe driving conditions.
4. Proper maintenance: Regular maintenance is essential for ensuring that all components of the vehicle are functioning properly. Drivers must perform regular inspections and address any issues promptly.
5. Speed restrictions: Drivers with a Doubles/Triples endorsement must adhere to speed limits on all roads, including highways and interstates. They should also adjust their speed based on road conditions, such as inclement weather or heavy traffic.
6. Following distance: Drivers should maintain a safe following distance between their vehicle and other vehicles on the road, especially when traveling at high speeds or in adverse weather conditions.
7. Special maneuvers: Drivers with a Doubles/Triples endorsement should avoid sudden lane changes, abrupt stops, or sharp turns that can cause instability in the combination of vehicles.
It's important for drivers with a Doubles/Triples endorsement to understand and follow these safety considerations and regulations to ensure their safety and the safety of others on the road. Violating these regulations could result in fines, penalties, or even the suspension or revocation of their CDL license.
Here are some of the important safety considerations and regulations that drivers with a CDL Doubles/Triples endorsement should be aware of:
1. Special driving skills: Drivers with a Doubles/Triples endorsement must have special driving skills and knowledge to operate these vehicles safely on the road. They must be able to maneuver the combination of vehicles in tight spaces, such as when backing up or turning.
2. Additional equipment requirements: Vehicles with multiple trailers require additional safety equipment, such as additional mirrors and lighting. Drivers must ensure that all required equipment is properly installed and functioning before operating the vehicle.
3. Weight distribution: Drivers must ensure that the weight of the cargo is distributed evenly between the trailers to prevent instability and unsafe driving conditions.
4. Proper maintenance: Regular maintenance is essential for ensuring that all components of the vehicle are functioning properly. Drivers must perform regular inspections and address any issues promptly.
5. Speed restrictions: Drivers with a Doubles/Triples endorsement must adhere to speed limits on all roads, including highways and interstates. They should also adjust their speed based on road conditions, such as inclement weather or heavy traffic.
6. Following distance: Drivers should maintain a safe following distance between their vehicle and other vehicles on the road, especially when traveling at high speeds or in adverse weather conditions.
7. Special maneuvers: Drivers with a Doubles/Triples endorsement should avoid sudden lane changes, abrupt stops, or sharp turns that can cause instability in the combination of vehicles.
It's important for drivers with a Doubles/Triples endorsement to understand and follow these safety considerations and regulations to ensure their safety and the safety of others on the road. Violating these regulations could result in fines, penalties, or even the suspension or revocation of their CDL license.
