Oregon Doubles and Triples Test
Study Oregon-specific double and triple trailer rules, including I-5 and I-84 highway regulations, to pass your CDL endorsement test.
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About the Oregon Doubles and Triples Test
Welcome to the free Oregon CDL Doubles and Triples practice test for 2026. This test is designed to help you prepare for the Oregon Department of Transportation (ODOT) endorsement exam required to operate double or triple trailer combinations on Oregon roads.
Oregon's unique geography and highways—such as I-5 through the Willamette Valley and I-84 along the Columbia River—demand specific knowledge of coupling procedures, braking systems, and weight distribution. Our 20 questions reflect the latest Oregon CDL manual standards.
Each question covers critical topics like air brake checks for multi-trailer setups, Oregon's maximum length limits (105 feet for doubles), and safe driving practices on mountain grades and tight urban curves. You'll also learn about Oregon's special permit requirements for oversize loads.
After completing the test, review your answers with detailed explanations. Passing this practice test is a great way to gauge your readiness before visiting any Oregon DMV office, from Salem to Portland, to take the official exam.
What This Test Covers
- Coupling and Uncoupling Double/Triple Trailers
- Inspecting Air Brake Systems for Multi-Trailer Combinations
- Safe Driving Practices on Oregon Highways (I-5, I-84, US 26)
- Weight, Length, and Axle Limits in Oregon
- Cargo Securement and Load Balance
- Oregon State-Specific Regulations for Doubles and Triples
Study Tips
Start by downloading the official Oregon CDL manual from the Oregon DMV website. Focus on Chapter 6 (Combination Vehicles) and the special section on doubles and triples. Highlight Oregon's unique rules, such as the 105-foot maximum length and the requirement for a separate T endorsement.
Visit your local Oregon DMV office (e.g., 1905 Lana Ave NE, Salem, OR 97314) to get a printed copy of the manual and ask about any recent regulation updates. Practice with our test multiple times, timing yourself to simulate the 25-minute limit. Pay extra attention to air brake pre-trip inspections—Oregon examiners often emphasize those.
Finally, drive or ride along on Oregon highways like I-5 near the Siskiyou Summit or I-84 through the Gorge to visualize real-world challenges. Combine our practice test with the DMV’s official practice tests for best results.
Oregon DMV Information
Oregon DMV
Main Office: 1905 Lana Ave NE, Salem, OR 97314
Phone: (503) 945-5000
Website: www.oregon.gov/odot/dmv
CDL Doubles/Triples Endowment Fees: The T endorsement costs $10 (plus base CDL fees). You must hold a valid Class A CDL and pass a knowledge test. No skills test is required for the T endorsement alone, but you must present it with your Class A license.
Requirements: You must be at least 18 years old for intrastate operation (21 for interstate), provide proof of identity, pass a vision test, and have no disqualifying traffic violations. Oregon requires a self-certification of medical status. Bring your current CDL and fee to any DMV office—walk-in appointments are available in Portland, Salem, Eugene, and other cities.
Frequently Asked Questions
Related Resources
Other Oregon CDL Practice Tests
Test Details
- State: Oregon
- Test: Doubles and Triples Test
- Questions: 93
- Passing Score: 80%
- Time Limit: 60 minutes
- Cost: Free
Need ELDT Training?
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Start Free ELDT TrainingQuick Topics
- Coupling & Uncoupling
- Inspections & Air Brakes
- Oregon Laws & Limits