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Dimming Headlights

Iowa Code § 321.415 — low beams within one thousand feet of an oncoming car

  • A driver approaching an oncoming vehicle within one thousand feet aims the beam so the glaring rays are not projected into the oncoming driver's eyes.
  • A driver following another vehicle within four hundred feet, except while passing, does not use the uppermost beam.
  • Motorcycles and motorized bicycles running between sunrise and sunset are outside both rules.
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Sources for this section (1)
  1. Iowa Code § 321.415 — Required usage of lighting devices

Legal information, not legal advice. Verified as of October 2026. Applying it to a particular situation is the work of a licensed Iowa attorney.

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