Mississippi Doubles and Triples Test
If you're hauling double trailers across the Delta on US-49, you need to know how they handle in crosswinds and on those two-lane stretches — this test gets you ready.
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Mississippi's Doubles and Triples test is 20 questions, 80% to pass. Use this practice test to nail the endorsement — no fluff, just what you'll see at the DPS office.
Key Topics
- •Coupling and uncoupling sequence
- •Trailer sway and crosswind handling
- •Braking and off-tracking
About the Mississippi Doubles and Triples Test
Topics Covered
- ✓Coupling and uncoupling double and triple trailers — Mississippi examiners watch for the exact sequence, especially when you're hooked to a pup trailer on a gravel lot.
- ✓Trailer stability and sway control — critical on I-55 when a gust from a passing 18-wheeler hits your second trailer.
- ✓Braking with multiple trailers — how to avoid brake fade on the long downhill grades near the Natchez Trace Parkway.
- + 3 more topics
📘 Study Tips & State Info
Memorize the coupling steps in order. Mississippi examiners love asking "what do you do first?" and "what do you check next?" The sequence is not negotiable — one step out of order and you fail the real test. Use the mnemonic "Chock, Connect, Charge, Check" to lock it in.
Focus on how wind affects doubles. Mississippi has plenty of open farmland in the Delta and coastal gusts from the Gulf. Know that a light-loaded second trailer is more likely to sway than a full one. The test will ask about reducing speed in high winds and when to pull over. Also, understand that off-tracking is worse with triples — you'll need to swing wider at intersections. Picture a tight turn on a two-lane road with a ditch on both sides, like you see on MS-16. That's where knowing your off-tracking pays off.
Finally, the Mississippi CDL handbook has a specific section on Doubles and Triples. Read it, but then take our practice tests until you consistently score 90% or better. The real test pulls from the same pool of questions, so repetition works.
Mississippi's CDL testing is handled by the Department of Public Safety (DPS). You'll take the Doubles and Triples written test at any DPS driver license station that offers CDL exams. Major locations include Jackson (Pearl), Gulfport, Tupelo, Hattiesburg, and Southaven. Appointments are required for the skills test but not for the written portion — though walk-in wait times can be long, especially on Monday mornings.
You must already hold a Class A CLP or CDL to add this endorsement. Bring your current license, medical certificate, and proof of residency. The test fee is $5 for the endorsement (as of 2025), but check with your local office because fees can change. Mississippi does not allow triple trailers on most highways — they're restricted to certain interstates and require a special permit. Even so, the written test covers triples because federal standards require it.
One thing that trips up Mississippi drivers: the DPS often asks about the maximum length for double trailers. In Mississippi, the maximum overall length for a double trailer combination is 28 feet per trailer (the standard "pup" size). Know that. Also, be ready for a question about the required distance between trailers — it's 12 inches maximum gap between the rear of the front trailer and the front of the rear trailer.
About the Mississippi Doubles and Triples Test
The Doubles and Triples endorsement is a separate written test you take after your Class A permit. It's not part of the Combination Vehicles test — it's extra, and you only need it if you plan to pull more than one trailer. In Mississippi, that means timber haulers, poultry feed trucks, and freight moving through the state's distribution hubs.
You'll answer 20 questions on coupling and uncoupling double and triple trailers, how to prevent trailer sway, and the special braking and turning techniques these rigs demand. The test follows federal standards, but Mississippi examiners know the local roads. They expect you to understand how a set of doubles handles on a two-lane highway like US-49 through the Delta, or how crosswinds from a Gulf storm can push your trailers on I-10 near Biloxi.
You need 16 correct to pass — that's 80%. The test isn't hard if you study the right material. The Mississippi CDL handbook covers everything, but we've boiled it down to what actually shows up on the exam. Our practice test mirrors the real thing: same question format, same time limit, same pass score.
Don't waste time on generic online tests. Mississippi's roads aren't flat and straight everywhere — the bridges over the Mississippi River, the curves on I-55 south of Jackson, the fog in the Pine Belt — all of it affects how you drive doubles. This test prepares you for that reality.
Topics Covered
Study Tips
Memorize the coupling steps in order. Mississippi examiners love asking "what do you do first?" and "what do you check next?" The sequence is not negotiable — one step out of order and you fail the real test. Use the mnemonic "Chock, Connect, Charge, Check" to lock it in.
Focus on how wind affects doubles. Mississippi has plenty of open farmland in the Delta and coastal gusts from the Gulf. Know that a light-loaded second trailer is more likely to sway than a full one. The test will ask about reducing speed in high winds and when to pull over. Also, understand that off-tracking is worse with triples — you'll need to swing wider at intersections. Picture a tight turn on a two-lane road with a ditch on both sides, like you see on MS-16. That's where knowing your off-tracking pays off.
Finally, the Mississippi CDL handbook has a specific section on Doubles and Triples. Read it, but then take our practice tests until you consistently score 90% or better. The real test pulls from the same pool of questions, so repetition works.
Mississippi Specific Information
Mississippi's CDL testing is handled by the Department of Public Safety (DPS). You'll take the Doubles and Triples written test at any DPS driver license station that offers CDL exams. Major locations include Jackson (Pearl), Gulfport, Tupelo, Hattiesburg, and Southaven. Appointments are required for the skills test but not for the written portion — though walk-in wait times can be long, especially on Monday mornings.
You must already hold a Class A CLP or CDL to add this endorsement. Bring your current license, medical certificate, and proof of residency. The test fee is $5 for the endorsement (as of 2025), but check with your local office because fees can change. Mississippi does not allow triple trailers on most highways — they're restricted to certain interstates and require a special permit. Even so, the written test covers triples because federal standards require it.
One thing that trips up Mississippi drivers: the DPS often asks about the maximum length for double trailers. In Mississippi, the maximum overall length for a double trailer combination is 28 feet per trailer (the standard "pup" size). Know that. Also, be ready for a question about the required distance between trailers — it's 12 inches maximum gap between the rear of the front trailer and the front of the rear trailer.