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 State of Delaware 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.
1. All air tanks must include:
Air brake system tanks must contain drain valves. These valves are used to drain accumulated oil and water from the tanks and may be either manually or automatically operated.
2. Most drivers are the least alert:
Fatigue and lack of alertness are major hazards when driving at night. Most people are the least alert at night, especially after midnight.
3. When coupling together two trailers, you can secure the second trailer by:
If you are attaching a second trailer to a combination but the trailer is not equipped with spring brakes, you can set the trailer emergency brakes. You can do this by connecting the first and second trailers' emergency lines, charging the air tank, then disconnecting the emergency lines. This should set the emergency brakes, as long as the slack adjusters are properly adjusted.
4. When checking its automatic transmission fluid, the vehicle:
Your vehicle's engine may need to be running in order for you to check the level of its automatic transmission fluid.
5. To avoid becoming an aggressive driver, you should:
To avoid becoming an aggressive driver, begin a trip with realistic expectations of how long the trip will take, allowing extra time for traffic delays. Do not tailgate other vehicles. To avoid upsetting other drivers, do not drive slowly in the left lane and do not gesture at the drivers (even in seemingly minor ways, like shaking your head).
6. When backing with a trailer, turning toward the driver’s side is encouraged because:
When driving in reverse, it is always recommended that a driver backs their vehicle toward its left side. This will allow the driver the best possible view of the rear of their vehicle.
7. Roads are slippery when it first begins to rain because:
Roads are especially slippery when it first begins to rain. Rain water initially mixes with oil and grease on the road to form a slippery film. As the rain continues, this mixture will eventually wash away.
Frequently Asked Questions
1. Meet the eligibility requirements: To apply for a CDL Doubles/Triples endorsement in Delaware, you must be at least 21 years old, have a valid Delaware CDL, and pass a background check.
2. Study for the Doubles/Triples endorsement exam: You need to thoroughly study the Delaware CDL driver's manual and prepare for the Doubles/Triples endorsement exam.
3. Schedule an appointment: Schedule an appointment with your nearest Delaware DMV office for the Doubles/Triples endorsement exam.
4. Take the written exam: On the day of your appointment, you need to take and pass the written exam on Doubles/Triples endorsement.
5. Pay the required fees: Pay the required fees for obtaining the CDL Doubles/Triples endorsement in Delaware.
6. Take a skills test (if required): Depending on your vehicle type and driving experience, you may need to take a skills test before obtaining your CDL Doubles/Triples endorsement in Delaware.
7. Receive your CDL Doubles/Triples endorsement: Once you pass both written and skills exams (if applicable) and pay all required fees, you will receive your CDL Doubles/Triples endorsement in Delaware.
1. Age: You must be at least 21 years old to drive a commercial motor vehicle across state lines or transport hazardous materials.
2. Valid CDL: You must hold a valid commercial driver's license (CDL) issued by the state of Delaware.
3. Clean driving record: You must have a clean driving record with no serious traffic violations or disqualifications within the past two years.
4. Medical certification: You must have a valid medical certificate issued by a certified medical examiner to prove that you are physically fit to drive.
5. Pass knowledge and skills test: You must pass the CDL Doubles/Triples knowledge test and, if required, the skills test to demonstrate that you can safely operate a commercial vehicle with double/triple trailers.
6. Background check: You must undergo a background check for any criminal history or disqualifying offenses.
7. Pay applicable fees: You must pay all applicable fees for obtaining the CDL Doubles/Triples license in Delaware.
Note that in addition to these requirements, you may also need to complete specialized training and obtain additional endorsements depending on the type of cargo you will be transporting.
The Federal Motor Carrier Safety Administration (FMCSA) has established specific training requirements for drivers seeking a CDL Doubles/Triples endorsement. Before applying for a CDL Doubles/Triples endorsement, you must have at least 1 year of experience driving a commercial motor vehicle with a Class A CDL.
You may also need to complete specialized training in handling double/triple trailers, including coupling and uncoupling procedures, pre-trip inspections, and safe driving practices. It is recommended that you enroll in a CDL training program that includes specific training on double/triple trailers.
Note that some employers may also require additional training or experience beyond the FMCSA minimum requirements, so it is important to check with your employer or potential employers to determine their specific requirements.
The Doubles/Triples endorsement knowledge test covers topics such as:
- Coupling and uncoupling procedures
- Inspecting double/triple trailers
- Safe driving practices when operating double/triple trailers
- Specialized rules and regulations for double/triple trailers
You will need to study the Delaware CDL Manual and take the Doubles/Triples endorsement knowledge test at a Delaware DMV location.
In addition to the written test, you may also need to pass a driving skills test that includes maneuvering a commercial vehicle with double/triple trailers. However, this will depend on your specific situation and the type of vehicle you will be operating.
1. Pre-trip inspection: You will need to demonstrate your knowledge of how to inspect a double/triple trailer for safety and compliance with state and federal regulations.
2. Basic control skills: You may need to perform basic maneuvers such as straight-line backing, offset backing, and parallel parking with a double/triple trailer.
3. On-road driving: You will need to demonstrate your ability to safely operate a commercial vehicle with double/triple trailers on public roads. This may include merging onto highways, changing lanes, turning at intersections, and navigating through traffic.
4. Coupling/uncoupling: You may need to demonstrate your ability to properly couple and uncouple double/triple trailers.
During the test, you will be evaluated on your ability to perform these skills safely and effectively. It is important to practice these maneuvers extensively before taking the test, and to follow all state and federal regulations for operating double/triple trailers.
In order to obtain this endorsement, you must pass an additional written test and, depending on the type of vehicle you will be operating, a driving skills test. You must also already hold a Class A CDL.
Operating a commercial vehicle without the required endorsements can result in fines and other penalties, as well as potential suspension or revocation of your CDL. It is important to comply with all state and federal regulations for operating commercial vehicles to ensure safety on the roads and avoid legal trouble.
To add this endorsement, you will need to visit a Delaware DMV office and provide your current CDL license. You will also need to pass the written test for the Doubles/Triples endorsement and pay the appropriate fee. The DMV will issue an updated CDL license with the new endorsement.
It is important to note that if you are adding the Doubles/Triples endorsement to your CDL, you may also need to pass additional driving skills tests if you plan to operate certain types of commercial vehicles. Be sure to check with the Delaware DMV for specific requirements based on your intended use of double/triple trailers.
Firstly, drivers with a CDL Doubles/Triples endorsement may only operate commercial motor vehicles that have two or three separate trailers or semi-trailers attached to the towing vehicle. These trailers must be connected to the towing vehicle in a specific manner that meets state and federal regulations.
Additionally, drivers with this endorsement are required to meet specific length and weight requirements for the commercial vehicle they are operating. These requirements may vary based on the type of vehicle and trailer being used.
It is also important to note that drivers with a CDL Doubles/Triples endorsement are required to display special reflective tape on their vehicles to enhance visibility at night. They must also have additional mirrors on their vehicles to improve vision.
Finally, drivers with this endorsement must adhere to all applicable state and federal regulations related to commercial vehicle operation, including hours-of-service limits, weight restrictions, and other safety rules. Violations of these regulations can result in fines, penalties, and suspension or revocation of your CDL license.
- The maximum gross vehicle weight (GVW) for a commercial vehicle with two trailers is 80,000 pounds.
- The maximum GVW for a commercial vehicle with three trailers is 120,000 pounds.
- The maximum length for a commercial vehicle that is towing two 28-foot trailers is 65 feet.
- The maximum length for a commercial vehicle that is towing two 48-foot trailers is 115 feet.
- The maximum length for a commercial vehicle that is towing three 28-foot trailers is 99 feet.
It's important to note that these limits are subject to change, and there may be other restrictions based on the specific type of commercial vehicle being used. It's always best to check with the Delaware DMV or a qualified CDL training school for the most up-to-date information on weight and length limits.
1. Properly secure your load: When hauling multiple trailers, it's essential to ensure that each trailer is properly secured and balanced. An unbalanced load can cause the trailer to sway or tip over, which can be dangerous.
2. Maintain proper speed: When driving double/triple trailers, it's important to maintain a safe and reasonable speed that takes into account the extra weight and length of the vehicle. Always obey posted speed limits and adjust your speed according to road conditions.
3. Use extra caution when turning: Turning with a double/triple trailer requires extra caution and skill. Make sure to use your turn signals, slow down before turning, and take wide turns to avoid swinging the trailer into other lanes or objects.
4. Check your mirrors frequently: With multiple trailers attached to your vehicle, your visibility can be limited. Check your mirrors frequently to ensure that you are aware of your surroundings and any potential hazards.
5. Follow hours-of-service regulations: Double/triple trailers can be more challenging to maneuver, which can lead to driver fatigue. Always follow hours-of-service regulations to ensure that you are well-rested and alert when operating these vehicles.
6. Maintain your vehicle: Regular maintenance is crucial for ensuring the safe operation of double/triple trailers. Make sure that all brakes, tires, lights, and other essential components are in good working order before hitting the road.
By following these safety considerations and regulations, you can help ensure the safe operation of double/triple trailers with a CDL Doubles/Triples endorsement in Delaware.