Texas Special Requirements CDL Practice Test 2026: Section 14 Master Guide

If you are preparing for your commercial license in the Lone Star State, studying the standard federal handbook is not enough. You will face a unique hurdle that drivers in other states don't have: The Texas Special Requirements Test.

Also known as "Section 14" or the "Texas CVO (Commercial Vehicle Operation) Rules," this exam covers state-specific laws that often differ from or add to federal regulations. Many experienced drivers transfer to Texas and fail this specific test because they assume the rules are the same everywhere. They aren't.

This Texas Special Requirements CDL Practice Test 2026 guide provides a deep dive into the specific lighting, equipment, and operational laws you must memorize to pass the Texas DPS exam.

1. What is the "Texas Special Requirements" Test?

The Texas Special Requirements CDL practice test focuses on the unique laws codified in the Texas Transportation Code. While the "General Knowledge" test covers federal safety rules (like air brakes and cargo securement), the "Special Requirements" test covers Texas-specific infrastructure and equipment laws.

Who must take it?

• Anyone applying for a Class A or Class B CDL in Texas.
• Anyone driving a commercial vehicle that doesn't strictly fall under federal jurisdiction but is regulated by Texas (e.g., certain farm vehicles).

Test Format:

• Questions: 20 multiple-choice questions.
• Passing Score: 70% (You must answer 14 out of 20 correctly). Note: Most other tests require 80%, but Section 14 technically allows a slightly lower threshold, though you should aim for 100%.

2. Critical Vehicle Equipment Rules (The #1 Failure Point)

The majority of questions on the Texas Special Requirements CDL practice test come from the equipment regulations found in Section 14. Texas has very specific measurements for lights, reflectors, and mud flaps.

A. Lighting and Reflectors

You must know exactly what color lights go where, and how high they must be mounted.

• Clearance Lamps: Every bus or truck 80 inches or more in overall width must have:
  • Front: Two amber clearance lamps.
  • Rear: Two red clearance lamps.
• Reflectors: Every commercial motor vehicle must have two red reflectors on the rear.
  • Mounting Height: Reflectors must be mounted at a height of not less than 24 inches nor more than 60 inches above the ground.
• Side Marker Lamps:
  • Front: Amber.
  • Rear: Red.

The "Farm Tractor" Exception: Every farm tractor and every self-propelled unit of farm equipment traveling after sunset must have two headlamps, one taillight, and two red reflectors.

B. Mud Flaps (Safety Guards)

This is a classic Texas question.

• Requirement: All trucks and trailers with four or more tires on the rear axle must have safety guards (mud flaps) behind the rear wheels.
• The "8-Inch" Rule: These flaps must be suspended within 8 inches of the roadway surface. If they are higher than 8 inches, you can be ticketed and will fail the exam questions.

C. Vehicle Height and Width

This is where Texas differs from the East Coast.

• Maximum Height: 14 feet. (Federal standard is usually 13'6").
• Maximum Width: 102 inches (8.5 feet).
• Maximum Length:
  • Single motor vehicle: 45 feet.
  • Semi-trailer: 59 feet.
  • Double trailers: 28.5 feet each.

Exam Tip: If a question asks for the maximum height in Texas, always choose 14 feet. Do not get confused by federal interstate standards.

3. Operational Laws: Driving in Texas

The Texas Special Requirements CDL practice test also covers how you must operate the vehicle.

Coasting (Illegal!)

It is illegal in Texas to coast downhill with the transmission in neutral or with the clutch disengaged.

• The Law: You must keep the vehicle in gear to maintain engine braking control.
• Why? Coasting removes your ability to accelerate instantly if needed and puts 100% of the braking load on the service brakes, leading to brake fade.

Following Distance

Texas law specifies following distances for commercial vehicles that differ slightly from the "seconds rule" in the general manual.

• The Rule: When one truck is following another truck or vehicle, you must maintain a distance large enough to allow another vehicle to enter and occupy the space safely.
• Crowding: You are legally prohibited from following another vehicle closer than is "reasonable and prudent."

Railroad Crossings

• Hazardous Materials: Any vehicle carrying placarded HazMat must stop within 15 to 50 feet of the nearest rail.
• Buses: School buses and passenger buses must also stop.
• Shifting: You must NOT shift gears while crossing the tracks. Select a gear that will take you all the way across before you start.

4. Registration and Weight Limits

You need to know the paperwork requirements.

Registration Papers (Cab Card)

• Requirement: You must always have the receipt for license plates (current registration) in the cab.
• Weight Limits: The maximum gross weight for a vehicle in Texas is 80,000 lbs unless you have an oversize/overweight permit.

Load Extensions

• Front: A load may not extend more than 3 feet beyond the front of the vehicle.
• Rear: A load may not extend more than 4 feet beyond the rear.
  • Exception: If it extends more than 4 feet, you must use a red flag (12 inches square) during the day or a red light at night.

5. Special Exemptions: Farm & Ranch

Texas loves its farmers, and the Texas Special Requirements section has many questions about waivers.

Class A Exempt (Form CDL-2)

A farmer can operate a Class A vehicle combination (e.g., a dually pulling a large cattle trailer) without a CDL if:

1. The vehicle is controlled and operated by the farmer or family.
2. It is used to transport agricultural products, machinery, or supplies to/from the farm.
3. It is NOT used for hire (common carrier).
4. It is used within 150 miles of the farm.

Cotton Vehicles: Special license plates and width exemptions apply to vehicles transporting seed cotton modules. These vehicles can be up to 10 feet wide (instead of the standard 8.5 feet) without a special permit, provided they are registered correctly.

6. Texas Special Requirements CDL Practice Test Questions (2026)

Test your knowledge with these high-probability questions derived from Section 14.

7. Conclusion: How to Prepare

The Texas Special Requirements CDL practice test is not difficult if you study the specific numbers (14 feet, 8 inches, 150 miles).

Do not rely solely on your general trucking knowledge. Texas has its own rules.

• Step 1: Read Section 14 of the Texas CDL Handbook.
• Step 2: Use our Texas CDL Practice Test for the General Knowledge portion.
• Step 3: Use the quiz above to master the Special Requirements.

By mastering these details, you will walk out of the DPS office with your permit in hand, ready to start your driving career in one of the best states for truckers.

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