Oregon CDL — General Knowledge practice
Oregon CDL — General Knowledge: Traffic Laws practice test
Speed limits, turning and signaling rules, headlight and seat-belt requirements, and the everyday laws every driver must follow.
Content reviewed against official driver handbooks · August 12, 2026
12 questions · pass with 10 correct. You get instant feedback and an explanation after every answer.
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12 sample Traffic Laws questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
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1. How much of your work history must you give an employer when applying for a commercial driving job?
Correct answer: Every driving job held during the previous 10 years
You must provide information on every driving job you have held during the previous 10 years.
Source: Oregon Commercial Driver Manual, Section 1.4 - Other CDL Rules
2. Which of the following counts as a serious traffic violation for a CDL holder?
Correct answer: Following another vehicle too closely
Serious traffic violations include following another vehicle too closely, reckless driving, erratic lane changes, and excessive speeding.
Source: Oregon Commercial Driver Manual, Section 1.3.3 - Serious Traffic Violations
3. Under the Move Over Law, what should you do when there is more than one lane in your direction of travel?
Correct answer: Move over one lane when it is safe
If there is more than one lane going your way, you must move over one lane when it is safe to do so.
Source: Oregon Commercial Driver Manual, Section i - Move-Over Law
4. At what blood alcohol concentration is it illegal to operate a commercial motor vehicle?
Correct answer: .04 percent or higher
It is against the law to drive a CMV with a blood alcohol concentration of .04 percent or more.
Source: Oregon Commercial Driver Manual, Section 1.3.2 - Alcohol, Leaving the Scene, and Felony
5. Within what time must you notify your employer after a conviction for a traffic violation (except parking)?
Correct answer: Within 30 days
You must tell your employer within 30 days of a conviction for any traffic violation other than parking.
Source: Oregon Commercial Driver Manual, Section 1.4 - Other CDL Rules
6. When must a commercial driver wear a safety belt?
Correct answer: At all times while operating a CMV
You must be properly restrained by a safety belt at all times while operating a commercial motor vehicle.
Source: Oregon Commercial Driver Manual, Section 1.4 - Other CDL Rules
7. What happens if a CMV driver is found with any detectable alcohol under .04 percent?
Correct answer: Placed out of service for 24 hours
A driver with any detectable amount of alcohol below .04 percent is placed out of service for 24 hours.
Source: Oregon Commercial Driver Manual, Section 1.3.2 - Alcohol, Leaving the Scene, and Felony
8. What does the federal regulation say about texting while driving a commercial vehicle?
Correct answer: Reading or entering text on a device is prohibited
Manually entering or reading text on an electronic device is banned for CMV drivers while driving.
Source: Oregon Commercial Driver Manual, Section 2.9.5 - Texting
9. What does federal rule allow regarding a hand-held mobile phone while driving a CMV?
Correct answer: Holding a phone to talk is prohibited while driving
You are not allowed to hold a mobile phone to talk or to dial by pressing more than a single button while driving a CMV.
Source: Oregon Commercial Driver Manual, Section 2.9.4 - Cell/Mobile Phones
10. What is the disqualification for a second conviction of using a hand-held phone while driving a CMV within three years?
Correct answer: 60 days
A second hand-held phone or texting conviction within three years brings a 60-day disqualification; three or more brings 120 days.
Source: Oregon Commercial Driver Manual, Section 2.9.4 - Cell/Mobile Phones
11. Under Oregon's Move Over Law, what must you do if you cannot safely change lanes for a vehicle with flashing lights?
Correct answer: Slow to at least 5 mph below the posted limit
If moving over is not possible, you must slow to at least 5 mph below the posted speed limit as you pass.
Source: Oregon Commercial Driver Manual, Section i - Move-Over Law
12. How many driver licenses may a commercial driver legally hold?
Correct answer: Only one
You cannot have more than one license; breaking this rule can bring a fine of up to $5,000 or jail.
Source: Oregon Commercial Driver Manual, Section 1.4 - Other CDL Rules
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