Colorado Doubles and Triples Test
From Raton Pass to the Eisenhower Tunnel, Colorado’s mountain roads demand you know how to handle double and triple trailers — this test gets you ready.
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Need the Doubles and Triples endorsement? This free practice test covers what the Colorado DMV will ask — coupling, stability, and mountain driving.
Key Topics
- •Coupling procedures
- •Trailer stability
- •Mountain driving
About the Colorado Doubles and Triples Test
Topics Covered
- ✓Coupling and uncoupling procedures — Colorado's steep loading ramps and uneven lots make the sequence critical; miss a step and you're in trouble.
- ✓Trailer stability and rollover prevention — Front Range winds can push empty trailers sideways; you need to know how to adjust speed and load.
- ✓Off-tracking on mountain curves — Double and triple trailers cut wider than single trailers; on I-70's tight bends, that can put you in the next lane.
- + 3 more topics
📘 Study Tips & State Info
Colorado DMV examiners focus on the sequence — they want you to recite coupling and uncoupling steps in order, not just the high points. Practice saying them out loud until you can do it without thinking. For the test, remember: always chock the trailer wheels and always test the air brake system before moving.
Pay extra attention to the sections on trailer sway and emergency braking. Colorado's mountain passes and crosswinds mean you'll face questions about what to do when a trailer starts to whip. The manual talks about reducing speed and not using the trailer brakes alone — that's a common test question.
Also, know Colorado's specific chain laws. If you're hauling doubles or triples on I-70 during winter, you'll need chains. The test might ask when they're required and how to install them safely.
Colorado requires the Doubles and Triples endorsement for any Class A CDL holder who operates combination vehicles with two or three trailers. You take this written test after passing General Knowledge and Combination Vehicles. The test fee is $28, and you can pay at the DMV office or through the myDMV portal.
You'll find CDL testing at many Colorado DMV offices, including Denver, Colorado Springs, Fort Collins, Grand Junction, and Pueblo. Appointments are strongly recommended — walk-ins wait hours. You'll need a valid Medical Examiner's Certificate and your current CDL or CLP before testing.
Colorado also has a separate skills test for the Doubles and Triples endorsement. You must demonstrate coupling, uncoupling, and a road drive with actual double or triple trailers. The written test is the first step, so pass it here before scheduling your road test.
About the Colorado Doubles and Triples Test
Colorado's not flat. If you're pulling doubles or triples here, you'll face steep grades on I-70 through Glenwood Canyon, crosswinds on I-25 near the Wyoming border, and tight curves on US-6 over Loveland Pass. The Colorado Doubles and Triples test makes sure you understand how these trailers behave in those conditions.
This endorsement is for Class A CDL holders who plan to tow two or three trailers. Colorado follows federal standards but adds state-specific rules about length limits, chain requirements, and axle weight restrictions. You'll get 20 questions and need 16 correct to pass.
The test covers coupling and uncoupling step by step — Colorado examiners expect you to know the exact sequence, especially on uneven ground. You'll also get questions on trailer sway, off-tracking in tight turns, and how to brake on long downgrades without overheating your brakes.
Our practice test matches the real thing. Same question format, same time limit, same Colorado focus. Use it to find your weak spots before you walk into the DMV.
Topics Covered
Study Tips
Colorado DMV examiners focus on the sequence — they want you to recite coupling and uncoupling steps in order, not just the high points. Practice saying them out loud until you can do it without thinking. For the test, remember: always chock the trailer wheels and always test the air brake system before moving.
Pay extra attention to the sections on trailer sway and emergency braking. Colorado's mountain passes and crosswinds mean you'll face questions about what to do when a trailer starts to whip. The manual talks about reducing speed and not using the trailer brakes alone — that's a common test question.
Also, know Colorado's specific chain laws. If you're hauling doubles or triples on I-70 during winter, you'll need chains. The test might ask when they're required and how to install them safely.
Colorado Specific Information
Colorado requires the Doubles and Triples endorsement for any Class A CDL holder who operates combination vehicles with two or three trailers. You take this written test after passing General Knowledge and Combination Vehicles. The test fee is $28, and you can pay at the DMV office or through the myDMV portal.
You'll find CDL testing at many Colorado DMV offices, including Denver, Colorado Springs, Fort Collins, Grand Junction, and Pueblo. Appointments are strongly recommended — walk-ins wait hours. You'll need a valid Medical Examiner's Certificate and your current CDL or CLP before testing.
Colorado also has a separate skills test for the Doubles and Triples endorsement. You must demonstrate coupling, uncoupling, and a road drive with actual double or triple trailers. The written test is the first step, so pass it here before scheduling your road test.