roadwise.Open study app

Alaska driving lesson · Railroads, Night, Weather & Emergencies

Night driving & headlight law

A 3-minute lesson from the Alaska course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
Railroads, Night, Weather & Emergencies
Checkpoint questions
6
Source pages
31, 66, 67

Per mile driven, night driving has a higher fatal crash rate than daytime driving, because you can't see as far, as soon, or as much. Alaska's lighting law sets exact times and distances for your headlights.

Headlight law

Headlight law
RuleRequirement
Headlights on1/2 hour after sunset to 1/2 hour before sunrise
Daytime headlightsWhen visibility is 1,000 feet or less
Dim for oncoming vehicle500 feet or more away
Dim when following300 feet or more behind
Handbook p. 67 ↗

Know the rule

Daytime headlights are required when fog, rain, snow, smoke, or dust cuts visibility to 1,000 feet or less.

Handbook p. 67 ↗

Know the rule

Parking lights mean a parked vehicle. Never drive using only parking lights, day or night.

Handbook p. 67 ↗
Dim headlights for oncoming traffic
Dim your lights when meeting or overtaking

Glare recovery time

The time it takes your pupils to readjust after oncoming headlights pass. During it you are virtually driving blind; it varies by person and is worse in older drivers.

Handbook p. 66 ↗
Headlight aim (correct vs incorrect)
Wrong and right: don't stare into oncoming headlights

Know the rule

When meeting vehicles at night, don't stare at their headlights. Use quick glances to check the oncoming vehicle's lane position, your own position, the right edge of the road, and objects ahead.

Handbook p. 67 ↗

Know the rule

Turn on headlights at dusk and in poor daytime visibility so others see you, and use low beams in rain, fog, snow or dust.

Handbook p. 67 ↗

Night safety tips:

  • Keep headlights working and lenses clean (check high and low beams on a garage wall)
  • Keep your windshield clean
  • Wear sunglasses in bright sun to protect night vision, but never wear them in the dark
  • Tinted windshields and front windows hurt night vision; tint must meet 13 AAC 04.223
  • Never use lights marked "off-road use only" on the roadway; they worsen glare for others
  • Even moderate drinking may reduce vision and reaction time
  • Prescription and nonprescription medicines can affect driving; read labels
  • Carry a flashlight and flares
Handbook p. 66 ↗

Put it into practice

You're on high beams on a dark highway and see a car's taillights ahead. Dim to low beams by the time you're 300 feet behind it. For an oncoming car, dim at 500 feet or more.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

When must headlights be turned on in the evening?
  1. 1/2 hour after sunset
  2. At sunset exactly
  3. 1 hour after sunset
  4. 15 minutes after sunset

Answer: 1/2 hour after sunset

Headlights must be on starting a half hour after sunset.

Handbook p. 67 ↗
At what visibility distance in daytime fog, rain, snow, or dust must headlights be turned on?
  1. 500 feet or less
  2. 2,000 feet or less
  3. 1,000 feet or less
  4. 300 feet or less

Answer: 1,000 feet or less

Headlights must be on in daytime whenever visibility drops to 1,000 feet or less.

Handbook p. 67 ↗
At what distance must you dim your headlights when approaching an oncoming vehicle?
  1. 200 feet or more
  2. 1,000 feet or more
  3. 300 feet or more
  4. 500 feet or more

Answer: 500 feet or more

Dim your headlights when you are 500 feet or more from an oncoming vehicle.

Handbook p. 67 ↗
At what distance must you dim your headlights when following another vehicle going the same direction?
  1. 300 feet or more
  2. 500 feet or more
  3. 100 feet or more
  4. 1,000 feet or more

Answer: 300 feet or more

Dim headlights at 300 feet or more when following a vehicle in the same direction.

Handbook p. 67 ↗
What is glare recovery time?
  1. The time it takes headlights to warm up
  2. The time it takes your pupil to readjust after being exposed to bright headlights
  3. The time your wipers take to clear the windshield
  4. The delay before high beams switch off automatically

Answer: The time it takes your pupil to readjust after being exposed to bright headlights

Glare recovery time is how long your pupil takes to readjust after glare from oncoming lights.

Handbook p. 66 ↗
What should you do with parking lights when your vehicle is in motion?
  1. Use them instead of headlights at night to save power
  2. Use them only during daytime fog
  3. Never use only parking lights while moving
  4. They are required whenever headlights are on

Answer: Never use only parking lights while moving

Parking lights denote a parked vehicle and should never be the only light used while moving.

Handbook p. 67 ↗
Take the lesson checkpoint in the app

More in Railroads, Night, Weather & Emergencies