Colorado CDL — General Knowledge practice
Colorado 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
14 questions · pass with 11 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. A single vehicle rated at 26,001 pounds or more GVWR, or one towing a unit not over 10,000 pounds, fits which license group?
Correct answer: Class B
Class B covers heavy straight vehicles: a single unit of 26,001 pounds or more, or such a vehicle towing a trailer rated at 10,000 pounds or less.
Source: Colorado CDL Manual, Section 1 (CDL Classifications)
2. What does the manual require of a driver regarding the safety belt while operating a CMV?
Correct answer: Be properly restrained by it at all times while driving
A driver must stay buckled by the safety belt the entire time a CMV is in operation; those thrown from a vehicle without one are far more likely to die.
Source: Colorado CDL Manual, Section 1.4 (Other CDL Rules)
3. Which group of endorsements is the only set permitted on a Commercial Learner's Permit (CLP)?
Correct answer: Passenger, school bus, and tank vehicle
A CLP may carry only three endorsements: passenger, tank vehicle, and school bus.
Source: Colorado CDL Manual, Section 1 (CDL Endorsements)
4. Federal rules limit how a CDL driver may use a hand-held mobile phone while driving. What is allowed?
Correct answer: A hands-free phone that can be reached and operated with a single button
A driver may not hold a phone to talk or press more than one button to dial; only a hands-free phone placed close by and operable in one touch may be used.
Source: Colorado CDL Manual, Section 1.4 (Other CDL Rules)
5. A CDL is required to drive any vehicle designed to carry how many people, counting the driver?
Correct answer: 16 or more people including the driver
Any vehicle designed to seat 16 people or more, counting the driver, comes under the CDL rule.
Source: Colorado CDL Manual, Section 1 (Introduction)
6. According to the manual, what is the youngest age at which a person may seek a CDL learner permit or hold a CDL?
Correct answer: 18 years of age
The minimum age is 18 to seek a CDL learner permit or to be issued a CDL; those aged 18 to 20 are held to intrastate driving only.
Source: Colorado CDL Manual, Section 1 (Legal Age)
7. A tank (N) endorsement is required when a tank's single rated capacity tops 119 gallons and the combined capacity reaches at least what amount?
Correct answer: 1,000 gallons or more
The tank (N) endorsement applies once a tank's individual rating exceeds 119 gallons and the combined rating hits 1,000 gallons or above.
Source: Colorado CDL Manual, Section 1 (CDL Endorsements)
8. While operating a commercial motor vehicle, sending or reading text messages is treated how under federal rules?
Correct answer: Prohibited while driving the vehicle
Texting while driving a CMV is prohibited, and repeated convictions bring a driver disqualification and civil penalties.
Source: Colorado CDL Manual, Section 2.9.5 (Texting)
9. In what language must all segments of the CDL skills test be conducted?
Correct answer: English only
The manual states that all CDL skills tests must be taken in English only.
Source: Colorado CDL Manual, Section 1.1.2 (Skills Tests)
10. A CDL is required for a single vehicle whose manufacturer-rated loaded weight (GVWR) is at least what figure?
Correct answer: 26,001 pounds
A single unit rated at 26,001 pounds GVWR or above calls for a CDL.
Source: Colorado CDL Manual, Section 1 (CDL Classifications)
11. The passenger (P) endorsement is required for anyone who drives a vehicle designed to carry at least how many people, including the driver?
Correct answer: 16 or more people including the driver
A driver must add the passenger endorsement to operate a vehicle with a design capacity of 16 or more people, including the driver.
Source: Colorado CDL Manual, Section 1 (CDL Endorsements)
12. Which description matches a Class A vehicle group?
Correct answer: A combination rated at 26,001 pounds or more towing a unit over 10,000 pounds
Class A is a combination with a GCWR of 26,001 pounds or more, provided the unit being towed is rated over 10,000 pounds GVWR.
Source: Colorado CDL Manual, Section 1 (CDL Classifications)
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