Special Requirements
All CDL applicants in Texas must pass a Commercial Rules test before they will be permitted to take any other CDL application tests. The Commercial Rules test is based on the information found in Section 14 of the Texas Commercial Motor Vehicle Drivers Handbook. This section covers special requirements for CMV drivers in the state of Texas, including lighting requirements, size and weight restrictions, and rules to enhance a driver’s safety. The test is made up of 20 multiple-choice questions, and applicants will need to correctly answer a minimum of 16 questions to pass.
Number of Question
Passing Score
8. Two ____ clearance lamps are required on the top front corners of any trailer more than 80 inches in width.
Explanation
Two amber clearance lamps are required on the top front corners of any trailer more than 80 inches in width. The top rear corners must be equipped with two red clearance lamps.
9. Flashing lights are permitted on emergency vehicles, snow plows, tow trucks, and:
Explanation
Flashing lights are permitted on emergency vehicles, snow plows, and school buses. Flashing lights are permitted on tow trucks when directed by law enforcement on the scene of an accident.
10. A farm tractor operated on a highway at night should be equipped with ____ on the rear.
Explanation
If operated at night on a highway, a farm tractor must be equipped with a white light on the front of the vehicle that is visible for 1,000 feet. The rear of the tractor must have two red lights visible for 1,000 feet, or one red light visible for 1,000 feet and two red reflectors visible for 600 feet.
11. Between the half hour after sunset and the half hour before sunrise, a driver should make sure their vehicle is carrying:
Explanation
It is important for drivers of commercial motor vehicles to keep emergency equipment in their vehicles. A bus, truck tractor, or truck should carry at least three flares, three red electric lanterns, or three portable red emergency reflectors when being driven at a time between a half hour after sunset and a half hour before sunrise.
12. When passing a two-wheeled vehicle on your right, be sure to leave at least ____ to the left of the vehicle.
Explanation
Use extra caution when passing a two-wheeled vehicle. Be sure to leave at least six feet of space between the two vehicles to ensure everyone's safety.
13. Except for a truck tractor-trailer combination, no combination of vehicles may be more than ____ in total length.
Explanation
You must make sure that your vehicle's measurements do not exceed legal limits. Except for a truck tractor-trailer combination, no combination of vehicles may be more than 65 feet in total length.
14. If you must make an emergency stop on the side of a roadway and your vision is obscured, you should place the first warning signal ____ behind your vehicle.
Explanation
