TruckingTruth logo

CDL Practice Test: Driving Rules & Regulations

These CDL practice questions are from our High Road Training Program, a CDL test preparation course designed to help you learn the CDL manual.

Our High Road Training Program has the entire CDL manual built right in along with multiple choice questions, a scoring system, and a review system to help reinforce the materials. It's highly effective, super easy to use, and free! Let me tall ya....using The High Road is a thousand times easier than trying to read the entire CDL manual cover to cover.

Click Here To Learn More

CDL Practice Test: Driving Rules & Regulations

Driving Rules & Regulations Questions

Click On The Picture To Begin

Good Luck!

What is the maximum trailer length allowed?
  • 53 feet
  • 50 feet
  • 60 feet
  • 48 feet
This is a question from page 4 - click here to look up the answer

Quote From Page 9 Of The Illinois CDL Manual:

Length

No vehicle with or without a load, other than a semitrailer, shall exceed a length of 42 feet. Semitrailers may have an overall length of 53 feet, including the load being carried.

Next
Special lighting for commercial vehicles are required between what times?
  • Sunset to sunrise
  • Special lighting is recommended, but not legally required
  • One hour before sunset to one hour after sunrise
  • Special lighting must always be present on commercial vehicles
This is a question from page 5 - click here to look up the answer

Quote From Page 10 Of The Illinois CDL Manual:

Lighting equipment is required on vehicles operated outside the limits of cities, towns or villages between sunset and sunrise.

TruckingTruth's Advice:

Any burnt out lights or improperly displayed lights is one way law enforcement officers decide which trucks to inspect. So it is very important you always check your lights and have extra bulbs available in case any of them burn out.

Prev
Next
Excessive speeding is considered a serious traffic violation. All of the following are grounds for excessive speeding except:
  • Failure to reduce speed to avoid an accident
  • Exceeding the speed limit by 10 mph
  • Exceeding the speed limit in a school zone
  • Driving too fast for conditions
This is a question from page 3 - click here to look up the answer

Quote From Page 8 Of The Illinois CDL Manual:

Excessive Speeding Excessive speeding involving any single offense for any speed of 15 mph or more above the posted speed limit.

  • Failure to reduce speed to avoid an accident.
  • Driving too fast for conditions.
  • Exceeding the speed limit in a school zone.

TruckingTruth's Advice:

As a serious traffic violation, excessive speeding carries additional consequences. Two serious traffic violations within a three-year period results in a two-month disqualification. Three serious traffic violations in the same period results in a four-month disqualification.

Prev
Next
What is the maximum allowable weight on a tandem axle?
  • 20,000 pounds
  • 34,000 pounds
  • 80,000 pounds
  • 40,000 pounds
This is a question from page 4 - click here to look up the answer

Quote From Page 10 Of The Illinois CDL Manual:

Weight

The maximum weight limits on both designated and non-designated streets and highways are:

  • 20,000 pounds on a single axle.
  • 34,000 pounds on a tandem, and
  • Up to 80,000 pounds of total weight on a 5-axle combination, depending upon axle spacing.
Prev
Next
The operator of a commercial motor vehicle can be criminally charged with driving under the influence of alcohol with a BAC of:
  • .05
  • .02
  • .08
  • .04
This is a question from page 3 - click here to look up the answer

Quote From Page 8 Of The Illinois CDL Manual:

A CDL holder may not operate a commercial vehicle with a BAC of .04 or more or a noncommercial vehicle with a BAC of .08 or more.

TruckingTruth's Advice:

It is important to note that any CDL holder found operating a commercial vehicle with any level of alcohol in his or her system will be placed out of service for a minimum of 24hrs. Drivers will not be criminally charged unless their BAC is .04 or higher, but commercial drivers are not allowed to operate commercial vehicles with even a trace amount of alcohol in their system.

And don't even think about having any alcohol anywhere in the cab of the truck at anytime - not even in the side box. If you get caught with it, it will likely be the end of your job, and possibly worse.

Prev
Next
If you are caught violating a DOT out of service order, you will receive a driving disqualification for:
  • A minimum of 6 months
  • A minimum of 1 year
  • A minimum of 9 months
  • A minimum of 3 months
This is a question from page 3 - click here to look up the answer

Quote From Page 8 Of The Illinois CDL Manual:

A conviction for violation of an out-of-service order results in disqualification for a minimum six months

TruckingTruth's Advice:

The department of transportation may put drivers out-of-service for several reasons, including equipment problems, hours of service violations, alcohol violations, and any other reason they deem fit. Do not violate the out-of-service order as that is a very serious offense and could ruin your career.

Prev
Next
Traffic violations which are deemed "serious" by the DOT carry additional consequences. What is an example of a serious traffic violation?
  • Following Too Closely
  • All of these are serious traffic violations
  • Excessive Speeding
  • Improper Lane Usage
This is a question from page 3 - click here to look up the answer

Quote From Page 9 Of The Illinois CDL Manual:

The following are listed as serious traffic violations:

  • Excessive Speeding
  • Reckless Driving
  • No Valid CDL
  • Following Too Closely
  • Improper Lane Usage
  • Conviction Involving a Fatal Accident
  • Multiple Licenses
Prev
Next
Following too closely is considered a serious traffic violation. Which of these is considered following too closely?
  • Failure of a truck to leave sufficient distance for being overtaken by another vehicle
  • Less than 8 seconds of following distance
  • Less than 400ft of following distance
  • Less than 12 seconds of following distance
This is a question from page 3 - click here to look up the answer

Quote From Page 9 Of The Illinois CDL Manual:

Following Too Closely:

  • Following the vehicle ahead too closely.
  • Failure of a truck to leave sufficient distance for being overtaken by another vehicle.

TruckingTruth's Advice:

While the CDL manual specifically states "failure of a truck to leave sufficient distance for being overtaken by another vehicle" there are many scenarios in which a driver can be charged with following too closely. But that is the answer you'll most likely see if asked on an exam.

Following too closely is considered a serious traffic violation and carries with it additional consequences. Two serious traffic violations within a three-year period results in a two-month disqualification. Three serious traffic violations in the same period results in a four-month disqualification.

Following too closely is one of the most dangerous things you can do. Keeping plenty of following distance is absolutely critical to safe driving.

Prev
Finish
Please select an option
[1,1,2,2,4,1,2,1]
8

Ready For A Quiz? Pick A Category:

Join Us!

We have an awesome set of tools that will help you understand the trucking industry and prepare for a great start to your trucking career. Not only are they fantastic, but everything we offer here at TruckingTruth is 100% free - no strings attached! So sign up now and get instant access to our member's section, including:
High Road Training Program Logo
  • The High Road Training Program
  • The High Road Article Series
  • The Friendliest Trucker's Forum Ever!
  • Private messaging for more personal questions
  • Email Updates When New Articles Are Posted

About Us

Picture Of Brett Aquila
TruckingTruth was founded by Brett Aquila (that's me!), a 15 year truck driving veteran, in January 2007. After 15 years on the road I wanted to help people understand the trucking industry and everything that came with the career and lifestyle of an over the road trucker. We'll help you make the right choices and prepare you for a great start to your trucking career.