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 15 multiple choice questions. Each question has three answer choices. To pass, the applicant must answer at least 12 questions correctly. Test questions come from the California Commercial Driver 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.
1. If a trailer is not at the proper height during coupling:
Before coupling together a tractor and a trailer, you should make sure the trailer is at the proper height. If the trailer is too low, the trailer nose may be damaged. If the trailer is too high, it may not be able to couple correctly.
2. While driving, a driver should:
It is essential that you are aware of what is happening on all sides of your vehicle at all times. Scan the road ahead and make regular checks of the mirrors on both sides of your vehicle while you are driving.
3. What should you do if your vehicle gets stuck on railroad tracks?
If your CMV gets stuck on railroad tracks, you should immediately leave the vehicle and get away from the tracks. Check the signposts or signal housing at the crossing for emergency contact information and call 911, or another appropriate emergency number.
4. Which of the following is not a type of distraction?
Distractions that can affect safe driving can be classified as physical (such as reaching for an object), mental (such as talking with passenger), or both (such as talking on a hand-held phone).
5. After finishing a pre-trip inspection, you should:
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.
Frequently Asked Questions
1. Obtain a California CDL: You must have a valid California Commercial Driver's License (CDL) before you can apply for a Doubles/Triples endorsement.
2. Pass the CDL Doubles/Triples knowledge test: The next step is to pass the written test for the Doubles/Triples endorsement. You can prepare for the test by studying the California Commercial Driver Handbook.
3. Schedule a DMV appointment: After passing the knowledge test, schedule an appointment with your local DMV office. You can make an appointment online or by calling their customer service line.
4. Pay the fee: There is a fee for adding a Doubles/Triples endorsement to your CDL. You can pay this fee at the DMV when you take your skills test.
5. Pass the CDL Doubles/Triples skills test: During your DMV appointment, you will need to take a skills test that includes a pre-trip inspection and a driving test using a vehicle with doubles/triples attached.
6. Receive your endorsement: If you pass the skills test, the DMV will add the Doubles/Triples endorsement to your CDL.
Remember to bring all necessary documents and identification to your DMV appointment, including your current CDL and proof of insurance for any vehicle you plan to use during your skills test.
1. Age: You must be at least 18 years old to drive intrastate (within California) or 21 years old to drive interstate (across state lines).
2. Valid CDL: You must have a valid California Commercial Driver's License (CDL) before you can apply for a 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 obtain a medical certificate from a certified medical examiner.
5. Pass the CDL Doubles/Triples knowledge test: You must pass the written test for the Doubles/Triples endorsement, which covers safety regulations and procedures specific to driving vehicles with doubles/triples.
6. Pass the CDL Doubles/Triples skills test: You must pass a skills test that includes a pre-trip inspection and a driving test using a vehicle with doubles/triples attached.
7. Pay the fee: There is a fee for adding a Doubles/Triples endorsement to your CDL.
Additionally, you may need to provide proof of residency in California and proof of insurance for any vehicle you plan to use during your skills test.
The Federal Motor Carrier Safety Administration (FMCSA) requires that you have experience operating a commercial motor vehicle (CMV) with a single trailer before you can operate a CMV with doubles/triples. Therefore, to obtain a Doubles/Triples endorsement, you must have at least one year of experience driving a CMV with a single trailer.
In addition to experience, it is highly recommended that you receive specific training on how to operate a CMV with doubles/triples. This training should cover topics such as proper coupling and uncoupling procedures, handling characteristics of doubles/triples, and driving techniques for safe operation.
You can receive this training from a qualified driving school or from your employer if you work for a trucking company. You may also consider taking additional courses or obtaining certifications related to driving commercial vehicles to improve your skills and knowledge.
The test covers topics specific to driving with double or triple trailers, such as coupling and uncoupling procedures, weight distribution, and the use of air brakes. You must pass this test to obtain the endorsement.
In addition to the written test, you will also need to pass a skills test that specifically evaluates your ability to operate a CMV with doubles/triples. This skills test includes a pre-trip inspection of the vehicle and a driving test that evaluates your ability to handle the increased length and weight of the vehicle.
It is important to note that you must already have a valid CDL before you can take the written and skills tests for the Doubles/Triples endorsement. Furthermore, you must also have at least one year of experience driving a commercial motor vehicle with a single trailer before you can apply for the Doubles/Triples endorsement.
1. Pre-trip inspection: You will need to demonstrate your ability to perform a thorough pre-trip inspection of the CMV and its double or triple trailers, identifying any issues that could impact the safety of the vehicle or its cargo.
2. Coupling and uncoupling: You will need to demonstrate your ability to properly couple and uncouple double or triple trailers, including checking that all connections are secure and performing air brake tests to ensure that the brake system is functioning properly.
3. Straight line backing: You will need to demonstrate your ability to safely back up a CMV with double or triple trailers in a straight line for a distance of at least 100 feet.
4. Off-set backing: You will need to demonstrate your ability to safely back up a CMV with double or triple trailers in an off-set configuration, where the trailer is positioned at an angle to the tractor.
5. Parallel parking: You will need to demonstrate your ability to safely parallel park a CMV with double or triple trailers, positioning the vehicle within a designated space without hitting any obstacles.
6. Turning and merging: You will need to demonstrate your ability to safely navigate turns and merge onto highways while driving a CMV with double or triple trailers, considering the increased length and weight of the vehicle.
These are just some examples of the skills and maneuvers you may be asked to perform during the CDL Doubles/Triples endorsement test. The specific requirements may vary depending on the state and testing location.
The Doubles/Triples endorsement is an additional knowledge and skills test that drivers must pass in addition to the general CDL knowledge and skills tests. Without this endorsement, a driver is not authorized to operate a CMV with double or triple trailers, even if they hold a valid CDL.
It is important to note that driving a CMV with double or triple trailers requires additional skills and knowledge compared to driving a single trailer. The additional weight and length of the vehicle can make it more difficult to maneuver, especially in tight spaces. The Doubles/Triples endorsement ensures that drivers have the necessary skills and knowledge to handle these types of vehicles safely.
To add the Doubles/Triples endorsement, you will need to pass a written knowledge test and a skills test that specifically evaluates your ability to safely operate a commercial motor vehicle (CMV) with double or triple trailers. You will also need to provide proof of your identity, residency, and legal presence in the United States.
Once you have passed the required tests and provided all necessary documentation, the California Department of Motor Vehicles (DMV) will add the Doubles/Triples endorsement to your existing CDL license. You will receive a new license with the endorsement added.
It is important to note that adding an endorsement may come with additional fees. The exact fees may vary depending on your location and other factors. It is recommended that you check with your local DMV office for specific fee information.
One restriction is that drivers with a Doubles/Triples endorsement are not allowed to operate triple trailers on California highways. Additionally, drivers with a Doubles/Triples endorsement must have a minimum age of 21 years old to operate a CMV with double or triple trailers.
Another restriction is that drivers with a Doubles/Triples endorsement must always ensure that the trailers are properly connected and secured. They must also make sure that the trailers do not exceed weight and length limits set by law.
Drivers with a Doubles/Triples endorsement must also be aware of their surroundings at all times, especially when turning or changing lanes. The additional length and weight of the vehicle can make it more difficult to maneuver, and drivers must exercise caution to avoid accidents.
It is important for drivers with a Doubles/Triples endorsement to always be aware of any other restrictions or requirements that may apply, as these can vary depending on the state in which they are driving.
The maximum weight limit for double and triple trailers is 80,000 pounds. However, the weight distribution between the axles of the tractor and trailers must be in compliance with the state's weight laws.
The maximum length limit for double trailers is 28 feet for each trailer, or a total of 56 feet overall. For triple trailers, the maximum length limit is 28 feet for each trailer, or a total of 75 feet overall.
It is important to note that different states may have different weight and length limits for double and triple trailers. Drivers with a CDL Doubles/Triples endorsement should always be aware of the specific regulations in the states in which they are operating their commercial vehicles.
1. Properly securing cargo: Drivers with a CDL Doubles/Triples endorsement must ensure that the cargo they are hauling is properly secured to prevent it from shifting or falling off the trailers during transit.
2. Checking brakes and lighting: It is important for drivers to regularly check the brakes and lighting systems of their double/triple trailers to ensure that they are in good working condition.
3. Maintaining safe following distances: Due to the increased length of double/triple trailers, it is important for drivers to maintain safe following distances to allow themselves enough time and space to react in case of an emergency.
4. Making wider turns: Drivers should make wider turns when driving double/triple trailers to ensure that their vehicles do not swing into other lanes or hit curbs or other objects.
5. Avoiding high winds and inclement weather: Double/triple trailers can be more difficult to control in high winds or inclement weather conditions, so drivers with a CDL Doubles/Triples endorsement should avoid driving in such conditions whenever possible.
6. Obeying weight and length limits: Drivers must ensure that their double/triple trailers do not exceed the weight and length limits set by law.
7. Staying alert and focused: Driving double/triple trailers can be more challenging than driving standard commercial vehicles, so it is important for drivers to stay alert, focused, and well-rested at all times.