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Facts verified Oct 24, 2026 against U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th. Dates that have passed are removed automatically.
Facts verified Oct 24, 2026 against U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th. Dates that have passed are removed automatically.
| Item | Detail | Official source |
|---|---|---|
| Passing score | 80% on each knowledge test | U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th |
| Exam fee (Hazmat endorsement (TSA threat assessment)) | $88.25 | tsa.gov |
| Exam fee (Hazmat endorsement, TWIC holder) | $41.00 reduced rate | tsa.gov |
| Retake policy | Retake must use a different test version | U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th |
| Validity (Commercial learner's permit) | Max 1 year from initial issuance without retesting | U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th |
| Renewal (Hazmat endorsement) | Renew every 5 years | tsa.gov |
| Delivery | Written, verbal or automated; foreign language allowed, no interpreter | U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th |
Facts verified Oct 24, 2026 against U.S. Department of Transportation – Federal Motor Carrier Safety Administration (49 CFR Part 383); TSA for the hazmat th. Dates that have passed are removed automatically.
| Truck Driving Per Mile | |
| Majority of Trucking Companies | $0.28 and $0.40 cents per mile |
| Other Companies | $0.45 cents per mile |
| Rookie Truck Drivers | $0.27 and $0.29 per mile |
| CDL Trucking Jobs | Expected Salary |
| Tanker Hauler | $70,000 per year |
| Oversized Load Hauler | $53,125 - $90,000 on average |
| Ice Road Trucker | $250,000 for just 2 months of icy-season work |
| Transport Driver | $53,000 per year on average |
| Hazmat Driver | $52,000 per year (may vary depending on experience) |
| Team Driver | $50,000 per year |
| OTR Driver | Starting annual salary is $40-$45,000 per year |
| Instructor | $51,800 per year |
| Recruiter | $50,000 per year |
| Owner/Operator | The average annual salary is $141,000. |
Prepare for the CDL - Commercial Driver's License exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
Try these questions from our free CDL practice tests. The correct answer and an explanation follow each question.
While driving a large vehicle, it is often difficult to see whether a vehicle is close behind you. Which of the following is a common reason someone may tailgate a driver of a large vehicle?
Answer: C. Bad weather or if the driver of the large vehicle is travelling too slowly.
Tailgating a large vehicle is dangerous and often occurs due to specific driving conditions or driver behavior. Drivers may tailgate in bad weather because visibility is reduced, making them feel they need to be closer to see the vehicle ahead. Additionally, if the large vehicle is traveling too slowly for the tailgater's preference, they might follow too closely out of impatience, increasing the risk of a collision.
You are driving a 40 foot truck at 35 MPH, how much space (in seconds) should you keep in front of you?
Answer: B. 4 seconds
The standard rule for commercial vehicles is to maintain a following distance of at least one second for every 10 feet of vehicle length. For a 40-foot truck, this calculation yields 4 seconds (40 feet / 10 feet per second). Since the speed is 35 MPH (not exceeding 40 MPH), no additional second is required, making 4 seconds the correct safe following distance.
Bus drivers cannot carry more than _______ lbs. of solid Class 6 poisons.
Answer: D. 100
Federal regulations specifically limit the amount of certain hazardous materials that can be transported on a passenger-carrying vehicle like a bus. For solid Class 6 poisons, bus drivers are restricted to carrying no more than 100 pounds. This regulation is in place to minimize the risk to passengers and the public in the event of an incident involving these dangerous substances.
You are driving a 50 foot truck at 38 MPH, how much space (in seconds) should you keep in front of you?
Answer: D. 5 seconds
The standard rule for determining a safe following distance for commercial vehicles is to allow one second for every 10 feet of vehicle length. For a 50-foot truck, this calculation yields 5 seconds (50 feet / 10 feet per second). Since the truck is traveling at 38 MPH, which is not above 40 MPH, no additional second is required, making 5 seconds the correct safe following distance.
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