Headlight dimming — Wyoming Permit Test

Headlight dimming on the Wyoming permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.

The rules

You should dim your high beams at least 500 feet before meeting an oncoming vehicle.

High beams blind the oncoming driver, and a blinded driver can drift into your lane.

You should dim at least 500 feet (about four to five seconds) before meeting an oncoming vehicle.
Wyoming Rules of the Road Driver License Manual, p.78

When you are within 300 feet of the rear of a vehicle you are approaching, dim your lights to their lowest beam.

Your high beams glare off the mirrors of the car ahead and blind its driver.

If you are within 300 feet from the rear of a vehicle you are approaching, dim your lights to their lowest beam.
Wyoming Rules of the Road Driver License Manual, p.78

A clean windshield, inside and out, helps reduce glare from oncoming vehicles, and clean headlights give more light.

Dirt and film on the glass scatter oncoming light into a blinding haze.

A clean windshield, inside and out, will help reduce the amount of glare from oncoming vehicles.
Wyoming Rules of the Road Driver License Manual, p.78

Staring at the spot your headlights make can cause eyestrain, fatigue and lack of concentration, so keep your eyes moving at night.

Eyes fixed on one bright spot miss the deer or walker at the edge of the road.

Eyestrain, fatigue and lack of concentration can be the result of staring at the spot created by your headlights.
Wyoming Rules of the Road Driver License Manual, p.78

On the test

How far ahead of an oncoming vehicle should you dim your high beams?

At least 500 feet. High beams blind the oncoming driver, and a blinded driver can drift into your lane. Wyoming Rules of the Road Driver License Manual, p.78: “You should dim at least 500 feet (about four to five seconds) before meeting an oncoming vehicle.”

How this works

Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.

You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.

Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.

What it costs

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Where these come from

Every rule here is checked against Wyoming Rules of the Road Driver License Manual, published by the Wyoming Department of Transportation, and against the state code itself. Last checked 2026-10-04.