CDL General Knowledge TestDriving SafelyMedium
You are driving a commercial vehicle at night and another vehicle is approaching from the opposite direction. What is the recommended distance at which you should dim your headlights?
- A200 feet
- B500 feet
- C100 feet
- D300 feet
Show answer & explanationAnswer & explanation
Correct answer: B. 500 feet
To prevent blinding oncoming drivers, you should dim your high beams when an oncoming vehicle is within 500 feet. This ensures their vision isn't impaired.
Why the other options are wrong
- A. 200 feet is still too close for adequate safety.
- C. 100 feet is too close; the oncoming driver would likely be blinded.
- D. 300 feet is better but not the universally recommended safe distance.
Headlight Dimming Distance (Oncoming)
Dim your high beam headlights when an oncoming vehicle is within 500 feet to prevent blinding the other driver.
- Prevents temporary blindness for other drivers.
- Enhances overall night driving safety.
- Applies to both cars and commercial vehicles.
Memory trick: Five hundred feet, then dim the bright light treat.