The vehicle's registration papers must include

a receipt for the license plates.

the weight of the vehicle when empty.

the maximum weight that the vehicle is registered to haul.

When following another vehicle, a CMV must leave

enough space for another vehicle to pass and enter the space between them safely.

five feet between the CMV and the vehicle in front.

a two-second following distance.

enough space to see the left outside mirror of the vehicle ahead.

If you're being tailgated, you should

increase your following distance.

decrease your following distance.

If you're towing a house trailer at night outside the city limits or on a divided highway, your vehicle must be equipped with

three flares or three portable red emergency reflectors.

two flares or two portable red emergency reflectors.

three flares and three portable red emergency reflectors.

What type of lighting does every farm tractor need to have?

Two head lamps; one taillight; two red reflectors; and hazard warning lights (flashers) that show white or amber to the front, and red or amber to the rear

One head lamp; two taillights; two green reflectors; and hazard warning lights (flashers) that show white or amber to the front, and red or amber to the rear

One head lamp; two taillights; two amber reflectors; and hazard warning lights (flashers) that show red to the front, and white to the rear

Two head lamps; two taillights; two white reflectors; and hazard warning lights (flashers) that show red to the front, and white to the rear

If your vehicle becomes disabled on a divided highway at a time when lighted lamps are not required, place red flags

100 feet and 200 feet behind your vehicle.

100 feet and 200 feet in front of your vehicle.

100 feet in front of your vehicle and 200 feet behind it.

200 feet in front of your vehicle and 200 feet behind it.

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20 questions
Pass mark 80%

Texas CDL: Special Requirements Practice Test

20 special requirements questions for the Texas CDL Knowledge Test, out of 75 in the app. Answer each to see whether you got it right and why. The real Texas Special Requirements test has 20 questions and you need 16 correct (80%) to pass.

Facts updated Oct 26, 2026
Official source: law.cornell.edu
Independent, not affiliated with the DMV. How we write our questions

How it works

1Pick an answer20 questions, one tap each.
2See the ruleRight or wrong, every answer is explained.
3Get your scoreCompared with the real 80% pass mark.

Start the test

0/20 answered0 correctPass mark 80%

1Question 1 of 20
Reflectors must be mounted at least ____ inches from the ground.
Not quite. The answer is 24
Reflectors must be mounted not less than 24 inches nor more than 60 inches in height above the ground on every pole trailer and on trucks, buses, truck tractors, trailers, or semitrailers that are 80 or more inches wide.
Source: Lighting and Reflectors, 14.2 Special Requirements (Equipment), Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
2Question 2 of 20
When towing another vehicle with a chain or cable, you must attach _________ to the connection.
Not quite. The answer is a white flag
When one vehicle is towing another, the connection must not be longer than 15 feet. If a chain, rope, or cable is used as the connection, there must be a white flag at least 12 inches square attached to it.
Source: 6. Load Limits, 14.3 Special Requirements – Limitations, Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
3Question 3 of 20
Each semitrailer or trailer may not exceed a length of _______ when operated in a tractor, semitrailer, and trailer combination.
Not quite. The answer is 28½ feet
A semitrailer or trailer may not exceed a length of 28½ feet when operated in a tractor, semitrailer, and trailer combination.
Source: 4. Maximum Lengths, 14.3 Special Requirements – Limitations (Note Exceptions), Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
4Question 4 of 20
The maximum length for a single motor vehicle other than a truck tractor is usually
Not quite. The answer is 45 feet.
The maximum length for a single motor vehicle other than a truck tractor is usually 45 feet although there are some exceptions.
Source: 4. Maximum Lengths, 14.3 Special Requirements – Limitations (Note Exceptions), Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
5Question 5 of 20
Every farm tractor must be equipped with how many head lamps?
Not quite. The answer is two
Every farm tractor and every self-propelled unit of farm equipment or implement of husbandry manufactured or assembled after January 1, 1972, shall be equipped with the following lamps and reflectors: two head lamps; one taillight mounted as far to the left as is practicable; two red reflectors; and vehicular hazard warning lights (flashers) which show white or amber to the front, and red or amber to the rear. These lights must be activated when the vehicle is being operated on any roadway.
Source: 10. Lighting Requirements for Farm Tractors and Implements of Husbandry, 14.2 Special Requirements (Equipment), Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
6Question 6 of 20
No vehicle, including the load that it is hauling, may be more than ______ tall.
Not quite. The answer is 14 feet
No vehicle, including the load it is hauling, may be more than 14 feet in height from the ground to the top of the load. If it is taller, you must apply to the Texas Department of Transportation for a special permit.
Source: 2. Height, 14.3 Special Requirements – Limitations (Note Exceptions), Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
7Question 7 of 20
If you don't have a special permit, the load on your truck may not extend more than ______ beyond the front of your vehicle or more than ______ beyond the rear.
Not quite. The answer is 3 feet; 4 feet
No vehicle may carry a load extending more than three feet beyond the front or more than four feet beyond the rear, unless a special permit is obtained.
Source: 8. Extensions over Front and Rear, 14.3 Special Requirements – Limitations, Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
8Question 8 of 20
The vehicle's registration papers must include
Not quite. The answer is all of the above.
These papers act as a receipt for the license plates. The papers must show the weight of the vehicle when empty and how much it is registered to haul.
Source: 14.1 Special Requirements (Papers, Permits), Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
9Question 9 of 20
When following another vehicle, a CMV must leave
Not quite. The answer is enough space for another vehicle to pass and enter the space between them safely.
When a CMV is following another vehicle, it must keep far enough back to allow another vehicle to overtake it and enter the space between them safely.
Source: 2. Following, 14.5 Special Requirements – Operating Rules, Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
10Question 10 of 20
If you're being tailgated, you should
Not quite. The answer is increase your following distance.
If you're being tailgated, increase your following distance to give both you and the tailgater more time to react to hazards ahead. This will also make it easier for the tailgater to pass you.
Source: 14.8 Special Requirements – Federal Regulations, Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
11Question 11 of 20
When one vehicle is towing another, the connection between these vehicles must not be longer than
Not quite. The answer is 15 feet.
When one vehicle is towing another, the connection must not be longer than 15 feet. If a chain, rope, or cable is used as the connection, there must be a white flag at least 12 inches square attached to it.
Source: 6. Load Limits, 14.3 Special Requirements – Limitations, Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
12Question 12 of 20
When driving during the summer, be especially alert for
Not quite. The answer is construction areas.
When driving in the summer, be on the lookout for lost, fatigued drivers on vacation; construction zones; and overloaded vehicles with obstructed visibility. Clues to tourist vehicles include car-top luggage and out-of-state license plates.
Source: 14.8 Special Requirements – Federal Regulations, Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
13Question 13 of 20
If you're towing a house trailer at night outside the city limits or on a divided highway, your vehicle must be equipped with
Not quite. The answer is three flares or three portable red emergency reflectors.
If you are towing a house trailer outside the city limits or on a divided highway at any time from a half hour after sunset to a half hour before sunrise, your vehicle must be equipped with three flares, three portable red emergency reflectors, or three red electric lanterns. At other times, your vehicle must have two red flags instead.
Source: Flares, Fusees, or Reflectors; 14.2 Special Requirements (Equipment); Section 14: Special Requirements for Texas Commercial Motor Vehicles; Texas Commercial Motor Vehicle Drivers Handbook
14Question 14 of 20
Any trailer or semitrailer whose width is _________ must be equipped with clearance lamps, side marker lamps, and side reflectors.
Not quite. The answer is 80 inches or more
Any trailer or semitrailer whose width is 80 inches or more must be equipped with clearance lamps, side marker lamps, and side reflectors. These lamps and reflectors must be amber in color, except for the rear clearance lamps and the rear side marker lamps, all of which should be red in color.
Source: 14.2 Special Requirements (Equipment), Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
15Question 15 of 20
What type of lighting does every farm tractor need to have?
Not quite. The answer is Two head lamps; one taillight; two red reflectors; and hazard warning lights (flashers) that show white or amber to the front, and red or amber to the rear
Every farm tractor and every self-propelled unit of farm equipment or implement of husbandry manufactured or assembled after January 1, 1972, must be equipped with the following lamps and reflectors: two head lamps; one taillight mounted as far to the left as is practicable; two red reflectors; and vehicular hazard warning lights (flashers) that show white or amber to the front, and red or amber to the rear. These lights must be activated when the vehicle is being operated on any public roadway.
Source: 10. Lighting Requirements for Farm Tractors and Implements of Husbandry, 14.2 Special Requirements (Equipment), Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
16Question 16 of 20
On a farm tractor, the color of the front hazard lights (flashers) should be
Not quite. The answer is white or amber.
Every farm tractor and implement of husbandry manufactured since 1972 must have hazard warning lights (flashers) that show white or amber to the front and red or amber to the rear. These lights must be activated when the vehicle is being operated on any roadway.
Source: 10. Lighting Requirements for Farm Tractors and Implements of Husbandry, 14.2. Special Requirements (Equipment), Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
17Question 17 of 20
The red lights on the rear of a farm tractor or roadway maintenance vehicle must be visible for at least
Not quite. The answer is 1,000 feet.
When operated on a roadway at night, all animal-drawn vehicles, implements of husbandry, road machinery, road rollers, and farm tractors not otherwise required to have lamps or lighting devices must have a white light on the front visible for 1,000 feet and two red lights on the rear visible for 1,000 feet, or one red light to the rear visible for 1,000 feet and two red reflectors visible for 600 feet.
Source: 6. Special Regulations for Certain Vehicles, 14.2. Special Requirements (Equipment), Section 14: Special Requirements for Texas Commercial Motor Vehicles, Texas Commercial Motor Vehicle Drivers Handbook
18Question 18 of 20
If your vehicle becomes disabled on a divided highway at a time when lighted lamps are not required, place red flags
Not quite. The answer is 100 feet and 200 feet behind your vehicle.
The first thing the driver of a disabled vehicle must do is put out the proper flares, flags, or reflectors. On a divided highway or one-way roadway when lighted lamps are not required, the driver should place red flags 100 feet and 200 feet behind the vehicle. (Note: Section 14.2 of the Texas Commercial Motor Vehicle Drivers Handbook incorrectly shows the red flags being placed 110 feet and 210 feet behind the vehicle.)
Source: TRANSP § 547.505
19Question 19 of 20
The rear of every bus or truck manufactured after model year 1959 must be equipped with
Not quite. The answer is two stoplights.
The rear of every bus or truck manufactured after model year 1959 must be equipped with two taillamps and two stop lamps. (A bus or truck manufactured in 1959 or earlier need be equipped with only one of each.)
Source: Prologue, Texas Commercial Motor Vehicle Drivers Handbook
20Question 20 of 20
On numbered rural US or state highways in Texas, what is the maximum daytime speed limit for pickup trucks with a manufacturer's rated carrying capacity of up to 2,000 pounds?
Not quite. The answer is 70 mph
On numbered US or state highways in Texas, the daytime speed limit for most types of motor vehicles is 70 mph. However, school buses are limited to 60 mph if they have passed a commercial motor vehicle inspection, or 50 mph otherwise.
Source: TRANSP § 545.352

Questions people ask

Is this Texas CDL: Special Requirements Practice Test like the real Texas CDL Knowledge Test?

The questions are written in the same style as the real test, from official sources, with an explanation for each answer. The real test has 20 questions; this free test has 20.

How many questions are on the Texas CDL Knowledge Test?

The General Knowledge test has 20 questions. Each class and endorsement adds its own test.

What score do you need to pass the Texas CDL Knowledge Test?

You need 16 out of 20 correct (80%).

How old do you have to be to take the Texas CDL Knowledge Test?

You can take it from age 18.

Where can I practice more questions?

The Driving Exam Prep app has the full question bank for your test, a step-by-step roadmap, a mistakes review and a readiness score against the real pass mark.

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Texas CDL: Special Requirements Practice Test

Reflectors must be mounted at least ____ inches from the ground.

When towing another vehicle with a chain or cable, you must attach _________ to the connection.

Each semitrailer or trailer may not exceed a length of _______ when operated in a tractor, semitrailer, and trailer combination.

The maximum length for a single motor vehicle other than a truck tractor is usually

Every farm tractor must be equipped with how many head lamps?

No vehicle, including the load that it is hauling, may be more than ______ tall.

If you don't have a special permit, the load on your truck may not extend more than beyond the front of your vehicle or more than beyond the rear.

The vehicle's registration papers must include

When following another vehicle, a CMV must leave

If you're being tailgated, you should

When one vehicle is towing another, the connection between these vehicles must not be longer than

When driving during the summer, be especially alert for

If you're towing a house trailer at night outside the city limits or on a divided highway, your vehicle must be equipped with

Any trailer or semitrailer whose width is _________ must be equipped with clearance lamps, side marker lamps, and side reflectors.

What type of lighting does every farm tractor need to have?

On a farm tractor, the color of the front hazard lights (flashers) should be

The red lights on the rear of a farm tractor or roadway maintenance vehicle must be visible for at least

If your vehicle becomes disabled on a divided highway at a time when lighted lamps are not required, place red flags

The rear of every bus or truck manufactured after model year 1959 must be equipped with

On numbered rural US or state highways in Texas, what is the maximum daytime speed limit for pickup trucks with a manufacturer's rated carrying capacity of up to 2,000 pounds?

More topic

Questions people ask

Official sources

Keep going

Your license is one lesson closer.

Reflectors must be mounted at least ____ inches from the ground.

When towing another vehicle with a chain or cable, you must attach _________ to the connection.

Each semitrailer or trailer may not exceed a length of _______ when operated in a tractor, semitrailer, and trailer combination.

The maximum length for a single motor vehicle other than a truck tractor is usually

Every farm tractor must be equipped with how many head lamps?

No vehicle, including the load that it is hauling, may be more than ______ tall.

If you don't have a special permit, the load on your truck may not extend more than ______ beyond the front of your vehicle or more than ______ beyond the rear.

The vehicle's registration papers must include

When following another vehicle, a CMV must leave

If you're being tailgated, you should

When one vehicle is towing another, the connection between these vehicles must not be longer than

When driving during the summer, be especially alert for

If you're towing a house trailer at night outside the city limits or on a divided highway, your vehicle must be equipped with

Any trailer or semitrailer whose width is _________ must be equipped with clearance lamps, side marker lamps, and side reflectors.

What type of lighting does every farm tractor need to have?

On a farm tractor, the color of the front hazard lights (flashers) should be

The red lights on the rear of a farm tractor or roadway maintenance vehicle must be visible for at least

If your vehicle becomes disabled on a divided highway at a time when lighted lamps are not required, place red flags

The rear of every bus or truck manufactured after model year 1959 must be equipped with

On numbered rural US or state highways in Texas, what is the maximum daytime speed limit for pickup trucks with a manufacturer's rated carrying capacity of up to 2,000 pounds?

More topic

Questions people ask

Official sources

Keep going

Your license is one lesson closer.

If you don't have a special permit, the load on your truck may not extend more than beyond the front of your vehicle or more than beyond the rear.