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. Each question has four answer choices. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the Texas Commercial Motor Vehicle Drivers Handbook. 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. What color is the low air pressure warning light?
Explanation
A low air pressure warning signal is required in vehicles with air brakes. The warning light is usually red and may be accompanied by a buzzer.
9. Large combination vehicles take the longest amount of time to stop:
Explanation
Large combination vehicles take longer to stop when they are empty than when they are loaded. The decreased weight causes a vehicle's wheels to have decreased traction on the surface of the road.
10. After finishing a pre-trip inspection, 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 to listen for escaping air. Close both shut-off valves before beginning to drive.
11. When checking the engine compartment:
Explanation
Before inspecting the engine compartment, make sure that the parking brakes are on and/or the wheels are chocked. Check the engine compartment before entering the cab and starting the engine.
12. A tractor protection valve is:
Explanation
On combination vehicles with air brakes, the tractor protection valve keeps air in the tractor or truck brake system, should the trailer develop a bad leak or break away from the tractor.
13. Due to the "crack-the-whip" effect:
Explanation
Double and triple trailer combinations are more likely to turn over due to the "crack-the-whip" effect than are other combination vehicles. Drivers should be aware of the rearward amplification of their specific vehicles and steer accordingly.
14. When driving a double, the lightest trailer should be placed:
Explanation
For safest handling when driving a double or triple combination vehicle, the most heavily loaded semi-trailer should be placed in the first position behind the tractor. The lightest trailer should be placed in the rear position.
Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Texas, you will need to follow these steps:
1. Meet the eligibility requirements: You must be at least 18 years old to operate within the state of Texas and 21 years old to operate across state lines. You must also already hold a valid Texas CDL.
2. Study for the Doubles/Triples endorsement test: You will need to obtain a copy of the Texas Commercial Motor Vehicle Drivers Handbook and study the material related to Doubles/Triples.
3. Schedule an appointment: Schedule an appointment at your nearest Texas Department of Public Safety (DPS) Driver License Office. You can do this online or by phone.
4. Bring required documents: On the day of your appointment, you will need to bring your current Texas CDL, proof of citizenship or lawful presence in the United States, and proof of identity.
5. Pass the Doubles/Triples endorsement test: The test is a written exam that covers topics related to driving doubles/triples, such as coupling and uncoupling, inspecting doubles/triples, and driving techniques.
6. Pay the fee: If you pass the test, you will need to pay a fee for the endorsement.
Once you have completed these steps, you will receive a new Texas CDL with the Doubles/Triples endorsement added.
1. Meet the eligibility requirements: You must be at least 18 years old to operate within the state of Texas and 21 years old to operate across state lines. You must also already hold a valid Texas CDL.
2. Study for the Doubles/Triples endorsement test: You will need to obtain a copy of the Texas Commercial Motor Vehicle Drivers Handbook and study the material related to Doubles/Triples.
3. Schedule an appointment: Schedule an appointment at your nearest Texas Department of Public Safety (DPS) Driver License Office. You can do this online or by phone.
4. Bring required documents: On the day of your appointment, you will need to bring your current Texas CDL, proof of citizenship or lawful presence in the United States, and proof of identity.
5. Pass the Doubles/Triples endorsement test: The test is a written exam that covers topics related to driving doubles/triples, such as coupling and uncoupling, inspecting doubles/triples, and driving techniques.
6. Pay the fee: If you pass the test, you will need to pay a fee for the endorsement.
Once you have completed these steps, you will receive a new Texas CDL with the Doubles/Triples endorsement added.
To obtain a CDL Doubles/Triples license in Texas, you must meet the following requirements:
1. Be at least 18 years of age: You must be at least 18 years old to operate within the state of Texas and 21 years old to operate across state lines.
2. Have a valid Texas CDL: You must already hold a valid Texas commercial driver's license (CDL) or be eligible to obtain one.
3. Pass the Doubles/Triples endorsement test: You must pass a written test on doubles/triples, which covers topics such as inspecting doubles/triples, coupling and uncoupling, and driving techniques.
4. Meet medical requirements: You must meet the medical requirements for commercial drivers, as outlined by the Federal Motor Carrier Safety Administration (FMCSA).
5. Provide proper identification: You must provide proof of citizenship or lawful presence in the United States, as well as proof of identity.
6. Pay any required fees: You will need to pay a fee for the Doubles/Triples endorsement, which may vary depending on your location.
Note that you may also need to meet other requirements, such as completing a driver training program or obtaining endorsements for other types of commercial vehicles. It's important to check with the Texas Department of Public Safety (DPS) for specific requirements and guidelines.
1. Be at least 18 years of age: You must be at least 18 years old to operate within the state of Texas and 21 years old to operate across state lines.
2. Have a valid Texas CDL: You must already hold a valid Texas commercial driver's license (CDL) or be eligible to obtain one.
3. Pass the Doubles/Triples endorsement test: You must pass a written test on doubles/triples, which covers topics such as inspecting doubles/triples, coupling and uncoupling, and driving techniques.
4. Meet medical requirements: You must meet the medical requirements for commercial drivers, as outlined by the Federal Motor Carrier Safety Administration (FMCSA).
5. Provide proper identification: You must provide proof of citizenship or lawful presence in the United States, as well as proof of identity.
6. Pay any required fees: You will need to pay a fee for the Doubles/Triples endorsement, which may vary depending on your location.
Note that you may also need to meet other requirements, such as completing a driver training program or obtaining endorsements for other types of commercial vehicles. It's important to check with the Texas Department of Public Safety (DPS) for specific requirements and guidelines.
In Texas, there are no specific experience or training requirements to obtain a CDL Doubles/Triples endorsement. However, you must already hold a valid Texas commercial driver's license (CDL) or be eligible to obtain one. You will also need to pass a written test on doubles/triples, which covers topics such as inspecting doubles/triples, coupling and uncoupling, and driving techniques.
That being said, it's highly recommended that you receive training and practice driving doubles/triples before taking the endorsement test. Driving doubles/triples requires different skills and techniques than driving a single commercial vehicle, so it's important to be prepared for the challenges that come with this type of driving. Some individuals may choose to enroll in a driver training program or seek out on-the-job training with an experienced driver to gain the necessary skills and experience.
Additionally, if you are planning to drive across state lines with doubles/triples, you may need to meet additional requirements set by the Federal Motor Carrier Safety Administration (FMCSA), such as completing a training program or obtaining specific endorsements. It is important to check with the FMCSA for specific requirements and guidelines in this case.
That being said, it's highly recommended that you receive training and practice driving doubles/triples before taking the endorsement test. Driving doubles/triples requires different skills and techniques than driving a single commercial vehicle, so it's important to be prepared for the challenges that come with this type of driving. Some individuals may choose to enroll in a driver training program or seek out on-the-job training with an experienced driver to gain the necessary skills and experience.
Additionally, if you are planning to drive across state lines with doubles/triples, you may need to meet additional requirements set by the Federal Motor Carrier Safety Administration (FMCSA), such as completing a training program or obtaining specific endorsements. It is important to check with the FMCSA for specific requirements and guidelines in this case.
Yes, in Texas, you must pass a written test specifically for the Doubles/Triples endorsement in addition to the general knowledge test required for a commercial driver's license (CDL). The Doubles/Triples endorsement test covers topics such as inspecting doubles/triples, coupling and uncoupling, and driving techniques.
You may also need to take additional written tests or exams if you are seeking endorsements for other types of commercial vehicles or driving situations. For example, if you plan to drive a tanker truck, you will need to pass a tanker endorsement test. If you plan to transport hazardous materials, you will need to pass a hazardous materials endorsement test.
It's important to note that the specific requirements for endorsements may vary by state. Therefore, it's important to check with your state's Department of Motor Vehicles (DMV) or Department of Public Safety (DPS) for information on the requirements and testing process for endorsements.
You may also need to take additional written tests or exams if you are seeking endorsements for other types of commercial vehicles or driving situations. For example, if you plan to drive a tanker truck, you will need to pass a tanker endorsement test. If you plan to transport hazardous materials, you will need to pass a hazardous materials endorsement test.
It's important to note that the specific requirements for endorsements may vary by state. Therefore, it's important to check with your state's Department of Motor Vehicles (DMV) or Department of Public Safety (DPS) for information on the requirements and testing process for endorsements.
In Texas, the CDL Doubles/Triples endorsement test is a written exam that covers specific knowledge and skills related to driving double and triple trailer combinations. While there is no actual driving test required for the Doubles/Triples endorsement, you will need to demonstrate knowledge of certain skills and maneuvers during the written exam. The following are some of the skills and maneuvers that may be covered in the exam:
1. Inspection of double and triple trailer combinations, including checking for proper coupling, air brake system, and lighting.
2. Proper coupling and uncoupling of double and triple trailer combinations.
3. Maneuvering double and triple trailer combinations safely in various driving situations, including turning, backing up, and changing lanes.
4. Understanding weight distribution and how it affects handling of double and triple trailer combinations.
5. Understanding the safe operation of air brakes on double and triple trailer combinations.
It's important to note that while there is no actual driving test required for the Doubles/Triples endorsement in Texas, you should still receive proper training on how to safely operate double and triple trailer combinations before attempting to take the endorsement test.
1. Inspection of double and triple trailer combinations, including checking for proper coupling, air brake system, and lighting.
2. Proper coupling and uncoupling of double and triple trailer combinations.
3. Maneuvering double and triple trailer combinations safely in various driving situations, including turning, backing up, and changing lanes.
4. Understanding weight distribution and how it affects handling of double and triple trailer combinations.
5. Understanding the safe operation of air brakes on double and triple trailer combinations.
It's important to note that while there is no actual driving test required for the Doubles/Triples endorsement in Texas, you should still receive proper training on how to safely operate double and triple trailer combinations before attempting to take the endorsement test.
No, in Texas, you are required to have a Doubles/Triples endorsement on your commercial driver's license (CDL) in order to operate a double or triple trailer combination. Operating these types of commercial vehicles without the proper endorsement could result in fines, penalties, and even the suspension or revocation of your CDL.
To obtain a Doubles/Triples endorsement in Texas, you must pass a written test specifically for the endorsement. The test covers topics such as inspecting doubles/triples, coupling and uncoupling, and driving techniques. You must also already hold a valid CDL and meet other requirements such as age and medical certification.
It's important to note that the specific requirements for endorsements may vary by state. Therefore, it's important to check with your state's Department of Motor Vehicles (DMV) or Department of Public Safety (DPS) for information on the requirements and testing process for endorsements in your state.
To obtain a Doubles/Triples endorsement in Texas, you must pass a written test specifically for the endorsement. The test covers topics such as inspecting doubles/triples, coupling and uncoupling, and driving techniques. You must also already hold a valid CDL and meet other requirements such as age and medical certification.
It's important to note that the specific requirements for endorsements may vary by state. Therefore, it's important to check with your state's Department of Motor Vehicles (DMV) or Department of Public Safety (DPS) for information on the requirements and testing process for endorsements in your state.
In Texas, you can add the CDL Doubles/Triples endorsement to your existing CDL license by passing the written endorsement test. You do not need to apply for a new CDL license.
To add the Doubles/Triples endorsement, you will need to bring your CDL and proper identification to a Texas Department of Public Safety (DPS) office. You will then need to pass the written test for the Doubles/Triples endorsement. You may also need to pay an additional fee for the endorsement.
It's important to note that in order to add any endorsement to your CDL license, you must already hold a valid CDL. Additionally, you may need to meet other requirements such as age and medical certification. Be sure to check with the Texas DPS for specific requirements and testing procedures for adding endorsements to your CDL license.
To add the Doubles/Triples endorsement, you will need to bring your CDL and proper identification to a Texas Department of Public Safety (DPS) office. You will then need to pass the written test for the Doubles/Triples endorsement. You may also need to pay an additional fee for the endorsement.
It's important to note that in order to add any endorsement to your CDL license, you must already hold a valid CDL. Additionally, you may need to meet other requirements such as age and medical certification. Be sure to check with the Texas DPS for specific requirements and testing procedures for adding endorsements to your CDL license.
Yes, there are restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Texas. These restrictions are in place to ensure the safety of the driver, other motorists, and the general public.
The following are restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Texas:
1. Length Limitations: Drivers with a CDL Doubles/Triples endorsement are restricted to pulling double or triple trailers that are no longer than 28 feet each.
2. Weight Limitations: Drivers with a CDL Doubles/Triples endorsement are restricted to pulling double or triple trailers that have a combined weight of 80,000 pounds or less.
3. Driving Restrictions: Drivers with a CDL Doubles/Triples endorsement are restricted from driving double or triple trailers on certain roads and highways. These restrictions may vary depending on the state and local laws.
4. Endorsement Renewal: The CDL Doubles/Triples endorsement must be renewed every five years to ensure that drivers remain up-to-date on current regulations and laws.
It's important to follow these restrictions and limitations as failure to do so could result in fines, penalties, and even the suspension or revocation of your CDL.
The following are restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Texas:
1. Length Limitations: Drivers with a CDL Doubles/Triples endorsement are restricted to pulling double or triple trailers that are no longer than 28 feet each.
2. Weight Limitations: Drivers with a CDL Doubles/Triples endorsement are restricted to pulling double or triple trailers that have a combined weight of 80,000 pounds or less.
3. Driving Restrictions: Drivers with a CDL Doubles/Triples endorsement are restricted from driving double or triple trailers on certain roads and highways. These restrictions may vary depending on the state and local laws.
4. Endorsement Renewal: The CDL Doubles/Triples endorsement must be renewed every five years to ensure that drivers remain up-to-date on current regulations and laws.
It's important to follow these restrictions and limitations as failure to do so could result in fines, penalties, and even the suspension or revocation of your CDL.
In Texas, drivers with a CDL Doubles/Triples endorsement are subject to weight and length limits when operating double or triple trailers. The maximum weight and length limits for double/triple trailers are as follows:
1. Weight Limitations: The combined weight of the double or triple trailers cannot exceed 80,000 pounds.
2. Length Limitations: The maximum length of each trailer is 28 feet.
It's important to note that these weight and length limits are subject to change, and may vary depending on the state and local laws. Drivers with a CDL Doubles/Triples endorsement should always be aware of the weight and length limitations in their area, and comply with all regulations to ensure their own safety, as well as the safety of other drivers on the road.
1. Weight Limitations: The combined weight of the double or triple trailers cannot exceed 80,000 pounds.
2. Length Limitations: The maximum length of each trailer is 28 feet.
It's important to note that these weight and length limits are subject to change, and may vary depending on the state and local laws. Drivers with a CDL Doubles/Triples endorsement should always be aware of the weight and length limitations in their area, and comply with all regulations to ensure their own safety, as well as the safety of other drivers on the road.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Texas. These regulations are in place to ensure the safety of the driver, other motorists, and the general public. Here are some safety considerations and regulations that drivers should follow:
1. Proper Training: Drivers with a CDL Doubles/Triples endorsement should receive proper training before operating double or triple trailers. This training should cover topics such as coupling and uncoupling, turning, backing up, and emergency maneuvers.
2. Inspections: Drivers should perform pre-trip inspections on their double or triple trailers to ensure that they are in good working condition before hitting the road.
3. Weight Distribution: Drivers should ensure that the weight is properly distributed between the trailers to prevent swaying or tipping.
4. Speed Limits: Drivers should follow posted speed limits and adjust their speed based on weather and road conditions.
5. Turning: Turning with double or triple trailers requires more space than turning with a single trailer. Drivers should be aware of their turning radius and allow for extra space when making turns.
6. Braking Distance: Double or triple trailers require more time and distance to come to a complete stop than single trailers. Drivers should allow for extra braking distance when driving with double or triple trailers.
7. Lane Changes: Drivers should use extra caution when changing lanes with double or triple trailers, as they require more space than single trailers.
It's important that drivers with a CDL Doubles/Triples endorsement follow these safety considerations and regulations to ensure their own safety, as well as the safety of other drivers on the road.
1. Proper Training: Drivers with a CDL Doubles/Triples endorsement should receive proper training before operating double or triple trailers. This training should cover topics such as coupling and uncoupling, turning, backing up, and emergency maneuvers.
2. Inspections: Drivers should perform pre-trip inspections on their double or triple trailers to ensure that they are in good working condition before hitting the road.
3. Weight Distribution: Drivers should ensure that the weight is properly distributed between the trailers to prevent swaying or tipping.
4. Speed Limits: Drivers should follow posted speed limits and adjust their speed based on weather and road conditions.
5. Turning: Turning with double or triple trailers requires more space than turning with a single trailer. Drivers should be aware of their turning radius and allow for extra space when making turns.
6. Braking Distance: Double or triple trailers require more time and distance to come to a complete stop than single trailers. Drivers should allow for extra braking distance when driving with double or triple trailers.
7. Lane Changes: Drivers should use extra caution when changing lanes with double or triple trailers, as they require more space than single trailers.
It's important that drivers with a CDL Doubles/Triples endorsement follow these safety considerations and regulations to ensure their own safety, as well as the safety of other drivers on the road.
