Utah CDL — General Knowledge practice
Traffic Laws
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 · July 7, 2026
14 questions · pass with 11 correct. You get instant feedback and an explanation after every answer.
Study questions with answers
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.
1. Which of these counts as a serious traffic violation for a commercial driver?
Correct answer: Following another vehicle too closely
Serious violations include excessive speeding of 15 mph or more over the limit, reckless driving, improper lane changes, and following too closely.
Source: Utah CDL Manual — Section 1: Introduction (Serious Traffic Violations)
2. What is the minimum disqualification for two serious traffic violations in a CMV within three years?
Correct answer: At least 60 days
Two serious traffic violations in a commercial vehicle within a three-year period cost the CDL for at least 60 days.
Source: Utah CDL Manual — Section 1: Introduction (Serious Traffic Violations)
3. While driving a CMV, how may a commercial driver legally handle a mobile phone?
Correct answer: Only hands-free and located close to the driver
You may only use a hands-free phone kept close by; holding the phone or dialing by pressing more than a single button is prohibited.
Source: Utah CDL Manual — Section 2: Driving Safely (Cell/Mobile Phones)
4. May a driver whose personal license is suspended get a hardship license to keep driving a CMV?
Correct answer: No, a hardship license is not allowed
No hardship license is available; if your personal-vehicle privilege is revoked, canceled, or suspended, you cannot obtain a hardship license to operate a commercial vehicle.
Source: Utah CDL Manual — Section 1: Introduction (Traffic Violations in Personal Vehicle)
5. For a driver who racks up three or more serious violations inside three years, how long is the disqualification?
Correct answer: At least 120 days
Three or more serious violations within three years result in loss of the CDL for at least 120 days.
Source: Utah CDL Manual — Section 1: Introduction (Serious Traffic Violations)
6. After how many convictions for hand-held phone use while driving a CMV is a CDL disqualified?
Correct answer: After two or more convictions
The CDL is disqualified after two or more convictions of a state hand-held phone law while operating a CMV, with 60 days for the second and 120 for three or more.
Source: Utah CDL Manual — Section 2: Driving Safely (Cell/Mobile Phones)
7. Within how many days must you notify your licensing agency of a traffic conviction in another jurisdiction?
Correct answer: Within 30 days
A conviction for any moving violation in another jurisdiction must be reported to your licensing agency inside 30 days, parking tickets excepted.
Source: Utah CDL Manual — Section 1: Introduction (Other CDL Rules)
8. How fast over the posted limit qualifies as excessive speeding among serious violations?
Correct answer: 15 mph or more over
The manual defines excessive speeding as at least 15 mph past the posted limit, one listed serious violation.
Source: Utah CDL Manual — Section 1: Introduction (Serious Traffic Violations)
9. Where must hazardous-materials shipping papers be kept while you are driving?
Correct answer: In a door pouch or in clear view within reach
On the road the documents belong in a door pouch or plainly visible within reach, and they should rest on the seat when you step out.
Source: Utah CDL Manual — Section 2: Driving Safely (Communicate the Risk)
10. In which setting does speeding rank as the leading cause of injuries and fatalities?
Correct answer: Roadway work zones
In roadway work zones, speeding traffic is the top cause of injury and death, so posted work-zone limits must always be obeyed.
Source: Utah CDL Manual — Section 2: Driving Safely (Roadway Work Zones)
11. What is the minimum disqualification for a first railroad-highway grade crossing violation?
Correct answer: At least 60 days
A first grade-crossing violation costs the CDL for at least 60 days, rising to 120 days for a second and one year for a third within three years.
Source: Utah CDL Manual — Section 1: Introduction (Grade Crossing Violations)
12. A driver's first breach of an out-of-service order brings what minimum disqualification?
Correct answer: At least 90 days
A first out-of-service order violation costs the CDL for at least 90 days.
Source: Utah CDL Manual — Section 1: Introduction (Out-of-Service Orders)
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Every Utah question is written from the official Utah driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free