California Permit Test Coach
Safe drivingQuestion 184 of 229

Which headlights should you use in heavy fog?

  1. High beams
  2. Parking lights only
  3. Fog lights only
  4. Low beams
Show answer

Correct answer: Low beams

High beams reflect back off the fog and cause glare. Never use only parking or fog lights.

Source: California Driver's Handbook (DL 600, California DMV, 2025), Section 8. Safe Driving: Fog or Heavy Smoke, page 64

Practice safe driving

Questions last reviewed: 18 October 2026