Louisiana Doubles and Triples Test
Learn to handle doubles on I-10 through the Atchafalaya Basin where wind and rain test your trailer control — this test covers exactly what you'll face.
Select Test Mode
This is the Louisiana Doubles and Triples endorsement test. 20 questions, 80% to pass, 25 minutes.
Key Topics
- •Coupling sequence and air line checks
- •Trailer stability and rollover prevention
- •Jackknife avoidance and braking techniques
About the Louisiana Doubles and Triples Test
Topics Covered
- ✓Coupling and uncoupling procedures – Louisiana's humidity and heat can cause air line fittings to stick, so you must check seals and connections every time.
- ✓Trailer stability and rollover prevention – On I-10 through the Atchafalaya Basin, high winds and sudden rain can shift your load; you need to know how weight distribution keeps you upright.
- ✓Jackknife causes and prevention – Louisiana's oil field roads often have tight turns and loose gravel; one quick brake can send your trailer sideways if you don't understand the physics.
- + 3 more topics
📘 Study Tips & State Info
Louisiana DMV examiners are sticklers for the coupling sequence. They want it in order: inspect equipment, back under, lock the fifth wheel, connect air and electrical, raise landing gear, tug test, final checks. Memorize that order cold. The test will give you scenarios where one step is missing and ask you what went wrong.
Think about how each rule applies to Louisiana roads. When the manual says 'reduce speed on curves,' picture the cloverleaf interchange at I-10 and I-12 in Baton Rouge. When it talks about crosswinds, think about driving doubles across the Lake Pontchartrain Causeway or the Atchafalaya Basin Bridge. That mental connection makes the answers stick better than rote memorization.
One more thing: Louisiana's test includes questions about tire condition and inflation. Our heat and humidity wear tires faster, and blowouts are more common. Know the minimum tread depth and how to inspect for cuts or bulges. Examiners here emphasize tire safety because they see the aftermath on the interstate.
The Louisiana Office of Motor Vehicles (OMV) handles all CDL written tests and skills exams. You'll take the Doubles and Triples test at any OMV office that offers CDL testing, or at approved third-party testing sites. Appointments are strongly recommended — walk-ins wait hours, especially in Baton Rouge, New Orleans, and Lafayette. Bring your current CDL permit, a valid Medical Examiner's Certificate, and proof of residency.
Fees: The Doubles and Triples endorsement costs $15 on top of your regular CDL license fee. If you're adding it to an existing CDL, you'll pay the endorsement fee but no additional test fee for the written exam. Skills test fees vary by location — OMV charges $50, third-party sites charge more.
Louisiana allows double trailers up to 28 feet each on designated highways (check the CDL manual for the full list). Triples are allowed only on specific interstate segments with special permits. The written test covers both doubles and triples, but most Louisiana drivers only pull doubles. You still need to know the triples material for the exam.
About the Louisiana Doubles and Triples Test
The Doubles and Triples endorsement is required for any Class A CDL holder in Louisiana who wants to pull two or three trailers. You'll see these rigs on I-10, I-12, and I-49, especially hauling oil field equipment out of Lafayette or container freight from the Port of New Orleans. The test covers coupling and uncoupling, trailer stability, and how to avoid rollovers — skills you need when you're pulling 100 feet of metal through Louisiana humidity and sudden thunderstorms.
Louisiana follows federal CDL testing standards, so the 20-question written exam is the same format as other states. But the road conditions here aren't the same. You've got the Atchafalaya Basin Bridge — 18 miles of concrete over swamp with crosswinds that can push a double trailer sideways. You've got I-10 east of Baton Rouge where summer downpours leave standing water in the right lane. The test expects you to know how trailer weight distribution and speed affect stability in those situations.
Coupling and uncoupling procedures are a big part of this test. Louisiana examiners want the exact sequence: back under, check the fifth wheel, connect air lines and electrical, raise the landing gear, and do a tug test. They'll ask about what happens if you skip a step — like forgetting to close the emergency gladhand seal. The manual is clear on every step, and the test follows it to the letter.
You don't need this endorsement for a Class B license. Only Class A drivers who plan to pull doubles or triples. Most Louisiana carriers running doubles are in the oil field, logistics, or long-haul freight. If you're working for a company that runs doubles on I-20 or I-49, you'll need this endorsement on your CDL.
Topics Covered
Study Tips
Louisiana DMV examiners are sticklers for the coupling sequence. They want it in order: inspect equipment, back under, lock the fifth wheel, connect air and electrical, raise landing gear, tug test, final checks. Memorize that order cold. The test will give you scenarios where one step is missing and ask you what went wrong.
Think about how each rule applies to Louisiana roads. When the manual says 'reduce speed on curves,' picture the cloverleaf interchange at I-10 and I-12 in Baton Rouge. When it talks about crosswinds, think about driving doubles across the Lake Pontchartrain Causeway or the Atchafalaya Basin Bridge. That mental connection makes the answers stick better than rote memorization.
One more thing: Louisiana's test includes questions about tire condition and inflation. Our heat and humidity wear tires faster, and blowouts are more common. Know the minimum tread depth and how to inspect for cuts or bulges. Examiners here emphasize tire safety because they see the aftermath on the interstate.
Louisiana Specific Information
The Louisiana Office of Motor Vehicles (OMV) handles all CDL written tests and skills exams. You'll take the Doubles and Triples test at any OMV office that offers CDL testing, or at approved third-party testing sites. Appointments are strongly recommended — walk-ins wait hours, especially in Baton Rouge, New Orleans, and Lafayette. Bring your current CDL permit, a valid Medical Examiner's Certificate, and proof of residency.
Fees: The Doubles and Triples endorsement costs $15 on top of your regular CDL license fee. If you're adding it to an existing CDL, you'll pay the endorsement fee but no additional test fee for the written exam. Skills test fees vary by location — OMV charges $50, third-party sites charge more.
Louisiana allows double trailers up to 28 feet each on designated highways (check the CDL manual for the full list). Triples are allowed only on specific interstate segments with special permits. The written test covers both doubles and triples, but most Louisiana drivers only pull doubles. You still need to know the triples material for the exam.