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 Idaho Commercial Driver’s License 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
1. Alcohol evaporators are:
Explanation
Some air brake systems include an alcohol evaporator. The evaporator introduces alcohol into the braking system to prevent the formation of ice, which can cause damage.
2. Rust around wheel nuts may mean:
Explanation
It is important to inspect your tires before every drive. Rust around wheel nuts may indicate that they are loose.
3. If the emergency air line loses pressure:
Explanation
The tractor protection valve keeps air in the trailer's braking system should the trailer break away or develop a leak. A loss of air pressure in the emergency line will cause the tractor protection valve to open and the emergency trailer brakes to activate.
4. If a vehicle's Anti-Lock Braking System (ABS) is malfunctioning:
Explanation
An Anti-Lock Braking System (ABS) intervenes to reduce brake pressure if there is a risk of wheel lockup. If the ABS isn't working, the vehicle's basic braking functions are not affected. A driver should continue to drive and brake in a normal manner.
5. 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.
6. Alcohol can be removed from your system:
Explanation
The liver removes alcohol from the body at a fixed rate, so the only way to sober up after consuming alcohol is to allow your body time to remove the alcohol on its own.
7. If a trailer begins to skid, it is best for the driver to:
Explanation
If your trailer begins to skid, you should release the brakes to regain traction. The trailer will begin to straighten out once the wheels begin to grip the road again.
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Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Idaho, you need to follow these steps:
1. Obtain a valid Idaho CDL: You must have a valid Idaho Commercial Driver's License (CDL) before you can apply for a Doubles/Triples endorsement.
2. Study the Idaho CDL manual: The Idaho CDL manual has information on the knowledge and skills you need to pass your Doubles/Triples endorsement test. Study this manual thoroughly.
3. Schedule a test appointment: You must schedule an appointment for the Doubles/Triples endorsement test at your local DMV office.
4. Take and pass the written test: When you go for your test, you will be required to take a written test on Doubles/Triples. You must answer at least 80% of the questions correctly to pass.
5. Pay the endorsement fee: After passing your written test, you will be required to pay a fee for the Doubles/Triples endorsement. The fee is $10.
6. Take and pass the skills test: After passing the written test and paying the fee, you will be required to take a skills test that covers operating double/triple trailers. You will need to provide your own vehicle and trailer for this test.
7. Receive your endorsement: If you pass the skills test, you will receive your CDL Doubles/Triples endorsement.
Note: Before taking your skills test, make sure that you have met all of the other requirements for obtaining a CDL in Idaho, including passing a medical exam and providing proof of identity and residency.
1. Obtain a valid Idaho CDL: You must have a valid Idaho Commercial Driver's License (CDL) before you can apply for a Doubles/Triples endorsement.
2. Study the Idaho CDL manual: The Idaho CDL manual has information on the knowledge and skills you need to pass your Doubles/Triples endorsement test. Study this manual thoroughly.
3. Schedule a test appointment: You must schedule an appointment for the Doubles/Triples endorsement test at your local DMV office.
4. Take and pass the written test: When you go for your test, you will be required to take a written test on Doubles/Triples. You must answer at least 80% of the questions correctly to pass.
5. Pay the endorsement fee: After passing your written test, you will be required to pay a fee for the Doubles/Triples endorsement. The fee is $10.
6. Take and pass the skills test: After passing the written test and paying the fee, you will be required to take a skills test that covers operating double/triple trailers. You will need to provide your own vehicle and trailer for this test.
7. Receive your endorsement: If you pass the skills test, you will receive your CDL Doubles/Triples endorsement.
Note: Before taking your skills test, make sure that you have met all of the other requirements for obtaining a CDL in Idaho, including passing a medical exam and providing proof of identity and residency.
To obtain a CDL Doubles/Triples license in Idaho, you must meet the following requirements:
1. Be at least 21 years old: You must be at least 21 years old to operate a commercial vehicle with a Doubles/Triples endorsement.
2. Have a valid Idaho CDL: You must possess a valid Idaho Commercial Driver's License (CDL) before you can apply for the Doubles/Triples endorsement.
3. Pass a medical exam: You must pass a medical examination and carry a valid Medical Examiner's Certificate to show that you are physically fit to operate a commercial vehicle.
4. Provide proof of identity and residency: You must provide proof of your identity and residency in Idaho.
5. Pass the Doubles/Triples written test: You must pass a written test that covers knowledge of double/triple trailer operation and safety.
6. Pass the Doubles/Triples skills test: You must pass a driving skills test that covers the operation of double/triple trailers.
7. Pay the required fees: You must pay all required fees for the Doubles/Triples endorsement.
If you meet all of these requirements, you will be issued a CDL with the Doubles/Triples endorsement in Idaho.
1. Be at least 21 years old: You must be at least 21 years old to operate a commercial vehicle with a Doubles/Triples endorsement.
2. Have a valid Idaho CDL: You must possess a valid Idaho Commercial Driver's License (CDL) before you can apply for the Doubles/Triples endorsement.
3. Pass a medical exam: You must pass a medical examination and carry a valid Medical Examiner's Certificate to show that you are physically fit to operate a commercial vehicle.
4. Provide proof of identity and residency: You must provide proof of your identity and residency in Idaho.
5. Pass the Doubles/Triples written test: You must pass a written test that covers knowledge of double/triple trailer operation and safety.
6. Pass the Doubles/Triples skills test: You must pass a driving skills test that covers the operation of double/triple trailers.
7. Pay the required fees: You must pay all required fees for the Doubles/Triples endorsement.
If you meet all of these requirements, you will be issued a CDL with the Doubles/Triples endorsement in Idaho.
Yes, you need specific experience and training to obtain a CDL Doubles/Triples endorsement in Idaho.
You must have at least one year of driving experience with a commercial driver's license before you can apply for the Doubles/Triples endorsement. This experience must include driving a vehicle with a Class A CDL, which is required for operating double/triple trailers.
Additionally, you must complete specialized training in double/triple trailer operation before taking the Doubles/Triples skills test. The training must be provided by a certified trainer and include at least 32 hours of instruction, including:
- A minimum of 8 hours of classroom instruction on double/triple trailer safety and operation
- A minimum of 24 hours of behind-the-wheel training and practice operating double/triple trailers
You must provide proof of completion of this specialized training to apply for the Doubles/Triples endorsement.
It is important to note that some employers may require additional training or experience beyond what is required by law to operate double/triple trailers.
You must have at least one year of driving experience with a commercial driver's license before you can apply for the Doubles/Triples endorsement. This experience must include driving a vehicle with a Class A CDL, which is required for operating double/triple trailers.
Additionally, you must complete specialized training in double/triple trailer operation before taking the Doubles/Triples skills test. The training must be provided by a certified trainer and include at least 32 hours of instruction, including:
- A minimum of 8 hours of classroom instruction on double/triple trailer safety and operation
- A minimum of 24 hours of behind-the-wheel training and practice operating double/triple trailers
You must provide proof of completion of this specialized training to apply for the Doubles/Triples endorsement.
It is important to note that some employers may require additional training or experience beyond what is required by law to operate double/triple trailers.
Yes, there is an additional written test that you must pass to obtain a CDL Doubles/Triples endorsement. In Idaho, the written test for the Doubles/Triples endorsement is a separate exam from the general knowledge test that is required for all CDL applicants.
The written test for the Doubles/Triples endorsement covers topics such as:
- Coupling and uncoupling trailers
- Inspecting double/triple trailers
- Checking air brakes on double/triple trailers
- Driving double/triple trailers safely
- Handling emergency situations with double/triple trailers
You must pass this written test with a score of at least 80% to qualify for the Doubles/Triples endorsement.
It is important to study and prepare for this exam, as it covers specialized knowledge that is specific to operating double/triple trailers and not covered on the general knowledge exam. There are several resources available to help prepare for the exam, including study guides and practice tests.
The written test for the Doubles/Triples endorsement covers topics such as:
- Coupling and uncoupling trailers
- Inspecting double/triple trailers
- Checking air brakes on double/triple trailers
- Driving double/triple trailers safely
- Handling emergency situations with double/triple trailers
You must pass this written test with a score of at least 80% to qualify for the Doubles/Triples endorsement.
It is important to study and prepare for this exam, as it covers specialized knowledge that is specific to operating double/triple trailers and not covered on the general knowledge exam. There are several resources available to help prepare for the exam, including study guides and practice tests.
To obtain a CDL Doubles/Triples endorsement in Idaho, you must pass a skills test that includes specific maneuvers related to operating double/triple trailers. The skills test consists of three parts: pre-trip inspection, basic control skills, and on-road driving.
Here are the specific skills and maneuvers you will need to demonstrate during the CDL Doubles/Triples endorsement test:
1. Pre-trip inspection: You will be required to perform a pre-trip inspection of your double/triple combination vehicle and demonstrate your knowledge of the vehicle's components, including brakes, coupling devices, lighting systems, and safety equipment.
2. Basic control skills: You will need to demonstrate basic control skills with your double/triple combination vehicle, including straight-line backing, offset backing, and parallel parking.
3. On-road driving: You will need to demonstrate your ability to safely operate a double/triple combination vehicle on public roads. This includes merging onto highways, changing lanes, turning corners, and handling other traffic situations.
During all parts of the test, you will be evaluated on your ability to safely operate the double/triple combination vehicle and follow all traffic laws and regulations. You must successfully complete all parts of the test with a passing score in order to obtain the CDL Doubles/Triples endorsement.
Here are the specific skills and maneuvers you will need to demonstrate during the CDL Doubles/Triples endorsement test:
1. Pre-trip inspection: You will be required to perform a pre-trip inspection of your double/triple combination vehicle and demonstrate your knowledge of the vehicle's components, including brakes, coupling devices, lighting systems, and safety equipment.
2. Basic control skills: You will need to demonstrate basic control skills with your double/triple combination vehicle, including straight-line backing, offset backing, and parallel parking.
3. On-road driving: You will need to demonstrate your ability to safely operate a double/triple combination vehicle on public roads. This includes merging onto highways, changing lanes, turning corners, and handling other traffic situations.
During all parts of the test, you will be evaluated on your ability to safely operate the double/triple combination vehicle and follow all traffic laws and regulations. You must successfully complete all parts of the test with a passing score in order to obtain the CDL Doubles/Triples endorsement.
No, you cannot operate double/triple trailers without a CDL Doubles/Triples endorsement. In Idaho, a CDL with a Doubles/Triples endorsement is required to operate a combination of two or more trailers with a gross vehicle weight rating (GVWR) of more than 26,000 pounds.
It is important to note that operating double/triple trailers requires specialized skills and knowledge beyond those needed to operate a standard commercial vehicle. This is why Idaho requires an additional written test and skills test specifically for the Doubles/Triples endorsement.
Additionally, if you are caught operating a double/triple combination vehicle without the proper CDL endorsement, you may face fines, penalties, and even suspension or revocation of your CDL. So it's important to make sure you have the proper endorsements before operating any commercial vehicle.
It is important to note that operating double/triple trailers requires specialized skills and knowledge beyond those needed to operate a standard commercial vehicle. This is why Idaho requires an additional written test and skills test specifically for the Doubles/Triples endorsement.
Additionally, if you are caught operating a double/triple combination vehicle without the proper CDL endorsement, you may face fines, penalties, and even suspension or revocation of your CDL. So it's important to make sure you have the proper endorsements before operating any commercial vehicle.
You can add the CDL Doubles/Triples endorsement to your existing CDL license without needing to apply for a new license. To add the endorsement, you will need to pass the required written test and skills test for the Doubles/Triples endorsement.
Here are the steps to add the CDL Doubles/Triples endorsement to your existing CDL license in Idaho:
1. Study for the Idaho CDL Doubles/Triples endorsement written test. You can find study materials and practice tests on the Idaho Transportation Department website.
2. Schedule an appointment at a local Idaho DMV office to take the written test for the Doubles/Triples endorsement. Be sure to bring your current CDL and any necessary identification documents.
3. Pass the written test for the Doubles/Triples endorsement.
4. Schedule an appointment at a local Idaho DMV office to take the skills test for the Doubles/Triples endorsement. You will need to provide your own double/triple combination vehicle for the skills test.
5. Pass the skills test for the Doubles/Triples endorsement.
6. Pay any necessary fees and receive your updated CDL with the Doubles/Triples endorsement added.
It's important to note that you must already hold a valid Class A CDL license in order to add the Doubles/Triples endorsement, as it is only available for Class A vehicles in Idaho.
Here are the steps to add the CDL Doubles/Triples endorsement to your existing CDL license in Idaho:
1. Study for the Idaho CDL Doubles/Triples endorsement written test. You can find study materials and practice tests on the Idaho Transportation Department website.
2. Schedule an appointment at a local Idaho DMV office to take the written test for the Doubles/Triples endorsement. Be sure to bring your current CDL and any necessary identification documents.
3. Pass the written test for the Doubles/Triples endorsement.
4. Schedule an appointment at a local Idaho DMV office to take the skills test for the Doubles/Triples endorsement. You will need to provide your own double/triple combination vehicle for the skills test.
5. Pass the skills test for the Doubles/Triples endorsement.
6. Pay any necessary fees and receive your updated CDL with the Doubles/Triples endorsement added.
It's important to note that you must already hold a valid Class A CDL license in order to add the Doubles/Triples endorsement, as it is only available for Class A vehicles in Idaho.
Yes, there are restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Idaho. Here are a few of the most important ones to keep in mind:
1. You can only operate double/triple trailers if you have the Doubles/Triples endorsement on your CDL.
2. You cannot exceed the maximum weight limits for your vehicle combination. In Idaho, the maximum weight limit for double/triple trailers is 129,000 pounds.
3. You must obey all traffic laws and regulations, especially those related to turning and lane changes. Double/triple trailer combinations require more space and time to maneuver than single vehicles, so it's important to be extra cautious on the road.
4. You must maintain a safe following distance from other vehicles. Double/triple trailer combinations require more stopping distance than single vehicles.
5. You must properly secure your cargo to prevent shifting or loss of load.
6. You may be required to have additional endorsements or certifications depending on the type of cargo you are hauling (e.g., hazardous materials).
It's important to remember that driving double/triple trailer combinations requires specialized skills and knowledge beyond those needed for standard commercial vehicles. Always follow safety protocols and stay up-to-date on Idaho's laws and regulations for commercial drivers with a Doubles/Triples endorsement.
1. You can only operate double/triple trailers if you have the Doubles/Triples endorsement on your CDL.
2. You cannot exceed the maximum weight limits for your vehicle combination. In Idaho, the maximum weight limit for double/triple trailers is 129,000 pounds.
3. You must obey all traffic laws and regulations, especially those related to turning and lane changes. Double/triple trailer combinations require more space and time to maneuver than single vehicles, so it's important to be extra cautious on the road.
4. You must maintain a safe following distance from other vehicles. Double/triple trailer combinations require more stopping distance than single vehicles.
5. You must properly secure your cargo to prevent shifting or loss of load.
6. You may be required to have additional endorsements or certifications depending on the type of cargo you are hauling (e.g., hazardous materials).
It's important to remember that driving double/triple trailer combinations requires specialized skills and knowledge beyond those needed for standard commercial vehicles. Always follow safety protocols and stay up-to-date on Idaho's laws and regulations for commercial drivers with a Doubles/Triples endorsement.
In Idaho, the maximum weight limit for double/triple trailers with a CDL Doubles/Triples endorsement is 129,000 pounds. This weight limit includes the weight of the tractor, trailer(s), and any cargo being transported.
The maximum length limit for double/triple trailers with a CDL Doubles/Triples endorsement is 28 feet for each individual trailer. The overall maximum length of the double/triple trailer combination, including the tractor, cannot exceed 105 feet.
It's important to note that weight and length limits can vary by state and may also depend on the type of cargo being transported. Always check with your state's Department of Transportation or other regulatory agency to ensure that you are in compliance with all weight and length restrictions.
The maximum length limit for double/triple trailers with a CDL Doubles/Triples endorsement is 28 feet for each individual trailer. The overall maximum length of the double/triple trailer combination, including the tractor, cannot exceed 105 feet.
It's important to note that weight and length limits can vary by state and may also depend on the type of cargo being transported. Always check with your state's Department of Transportation or other regulatory agency to ensure that you are in compliance with all weight and length restrictions.
Yes, there are several safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Idaho. Here are some of the most important ones:
1. Ensure proper weight distribution: When hauling double/triple trailers, it's important to ensure that the weight is evenly distributed across all trailers. Uneven weight distribution can create instability and increase the risk of a rollover.
2. Use caution when turning: Turning with a double/triple trailer requires extra care and attention. Always use your turn signals, and make wide turns to avoid hitting curbs or other obstacles.
3. Maintain a safe following distance: Double/triple trailer combinations require more stopping distance than single vehicles, so it's important to maintain a safe following distance from other vehicles.
4. Secure your cargo properly: Improperly secured cargo can shift or fall off the trailer, creating a safety hazard for other drivers on the road.
5. Be prepared for emergencies: Double/triple trailer combinations are more complex than single vehicles, so it's important to be prepared for emergencies such as brake failure or tire blowouts. Always carry emergency supplies such as flares, reflective triangles, and a fire extinguisher.
6. Stay up-to-date on regulations: Regulations related to commercial driving can change frequently, so it's important to stay up-to-date on all applicable regulations and requirements.
Remember that driving double/triple trailers requires specialized skills and knowledge beyond those needed for standard commercial vehicles. Always follow safety protocols and stay up-to-date on Idaho's laws and regulations for commercial drivers with a Doubles/Triples endorsement.
1. Ensure proper weight distribution: When hauling double/triple trailers, it's important to ensure that the weight is evenly distributed across all trailers. Uneven weight distribution can create instability and increase the risk of a rollover.
2. Use caution when turning: Turning with a double/triple trailer requires extra care and attention. Always use your turn signals, and make wide turns to avoid hitting curbs or other obstacles.
3. Maintain a safe following distance: Double/triple trailer combinations require more stopping distance than single vehicles, so it's important to maintain a safe following distance from other vehicles.
4. Secure your cargo properly: Improperly secured cargo can shift or fall off the trailer, creating a safety hazard for other drivers on the road.
5. Be prepared for emergencies: Double/triple trailer combinations are more complex than single vehicles, so it's important to be prepared for emergencies such as brake failure or tire blowouts. Always carry emergency supplies such as flares, reflective triangles, and a fire extinguisher.
6. Stay up-to-date on regulations: Regulations related to commercial driving can change frequently, so it's important to stay up-to-date on all applicable regulations and requirements.
Remember that driving double/triple trailers requires specialized skills and knowledge beyond those needed for standard commercial vehicles. Always follow safety protocols and stay up-to-date on Idaho's laws and regulations for commercial drivers with a Doubles/Triples endorsement.
