CDL Practice Test

CDL Night Driving Practice Questions

Night Driving makes up 1 of every 50 questions on a Tigertest CDL practice test. Here are 10 of the 30 questions on it, each with the answer and the reason.

Updated 2026-11-10 by the Tigertest team. Covers the CDL general knowledge exam. 80% to pass on the real test.

1. 1. When should you use your headlights while driving?

   • A.Only when visibility becomes completely dark with no ambient light
   • B.From sunset to sunrise and during any poor visibility conditions
   • C.Only in heavily populated urban areas with insufficient street lighting
   • D.From one hour after sunset to one hour before sunrise

   Answer: B. Use your headlights at night and whenever visibility is poor. State laws set the exact times, commonly from 30 minutes after sunset to 30 minutes before sunrise, so having them on from sunset to sunrise always meets the rule.

2. 2. Your headlights should illuminate the road ahead for at least?

   • A.200 feet
   • B.500 feet
   • C.100 feet
   • D.350 feet

   Answer: D. Headlights should illuminate at least 350 feet ahead to provide adequate stopping distance at highway speeds.

3. 3. When should you dim your high beam headlights?

   • A.Within 500 feet of oncoming traffic or a vehicle you follow
   • B.Only in heavy traffic with multiple vehicles in close proximity
   • C.When driving in city limits only with adequate street lighting
   • D.Never dim them as they provide the best visibility available

   Answer: A. The CDL manual says to dim your high beams within 500 feet of an oncoming vehicle and when following another vehicle within 500 feet, so you do not blind other drivers.

4. 4. At night, your speed should be?

   • A.Slightly faster to get home sooner
   • B.10 mph below the posted speed limit on any road
   • C.Slow enough to stop within your sight distance
   • D.The same as during the day, since headlights show the road

   Answer: C. Night driving requires speeds that allow you to stop within the distance illuminated by your headlights.

5. 5. If you're blinded by oncoming headlights, you should?

   • A.Flash your high beams at the other driver
   • B.Close your eyes briefly
   • C.Look toward the right edge of the road
   • D.Look directly at the bright lights

   Answer: C. Looking toward the right edge of the road helps avoid the glare while maintaining some forward vision until your eyes recover.

6. 6. How long does it take your eyes to adjust to darkness?

   • A.Up to 10 minutes
   • B.About 30 seconds
   • C.About 1 minute
   • D.About 5 minutes

   Answer: A. Complete night vision adjustment can take up to 10 minutes, during which driving ability is significantly reduced.

7. 7. What should you do to prepare for night driving?

   • A.Wear sunglasses for reduced glare
   • B.Turn on interior lights for better visibility
   • C.Increase following distance only
   • D.Clean headlights, windshield, and mirrors

   Answer: D. Clean windows and lights are essential for maximum visibility during night driving conditions.

8. 8. The most dangerous time for drowsy driving is?

   • A.Just after sunrise
   • B.Early morning hours
   • C.Late evening after dinner
   • D.Noon to 2 PM

   Answer: B. Your body's circadian rhythm makes drowsiness most likely in the early morning hours, between midnight and 6 AM, when your body expects to be asleep.

9. 9. Signs of drowsy driving include?

   • A.Improved concentration and enhanced focus on driving tasks
   • B.Frequent blinking and yawning
   • C.Increased alertness and heightened awareness of road conditions
   • D.Better reaction times and improved decision-making capabilities overall

   Answer: B. Frequent blinking, yawning, and head nodding are early warning signs of dangerous drowsiness while driving.

10. 10. If you become drowsy while driving, you should?

    • A.Open windows for fresh air
    • B.Drink coffee and continue driving
    • C.Turn up the radio volume
    • D.Stop in a safe place and rest

    Answer: D. The only safe solution for drowsiness is adequate rest; temporary measures like coffee or fresh air are not reliable solutions.