🎓 Prepared by students from Boğaziçi University

When Must You Use Headlights?

Headlight usage is a fundamental traffic safety rule. You must use headlights during darkness, low visibility conditions, and in tunnels to be visible to other drivers.

Short answer

You must use headlights at night (dusk to dawn), in fog, rain, snow, darkness, low visibility, and in all tunnels — staying visible keeps everyone safe.

Headlight Usage Conditions

1
Night/Darkness
From dusk to dawn, always use headlights.
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2
Low Visibility
Fog, rain, snow, or poor weather.
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3
Tunnels
All tunnels require headlights.
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4
Following
Use low beam to avoid dazzling.

Step-by-step worked examples

At 6:30 PM in winter, when must you switch on headlights?

Winter dusk occurs around 17:00–17:30
At 6:30 PM, darkness is falling
You must switch on low-beam headlights immediately.

You approach a fog bank on the highway. When must lights be on?

Fog reduces visibility below normal daylight
Fog qualifies as low-visibility condition
Switch on headlights + hazard lights (if stopped)

Entering a 2 km tunnel at 14:00 on a sunny day. Lights required?

Tunnels have no natural light, regardless of time
Turkish law mandates headlights in ALL tunnels
Yes, use low-beam headlights.

Flashcards

Quick quiz

Q1.Turkish law requires headlights in tunnels…

Correct answer: C. All tunnels are dark regardless of time. Lights are always mandatory.

Q2.You're driving in dense fog at 15:00. Should headlights be on?

Correct answer: B. Fog is low visibility. You must use dipped headlights for safety.

Q3.What time must headlights be on in winter?

Correct answer: B. Dusk–dawn varies by season; roughly 17:00–08:00 in winter.

Q4.In heavy rain, low beam or high beam?

Correct answer: B. Dipped lights reduce glare on wet surfaces; high beam reflects off rain.

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Common mistakes

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Thinking tunnels only need lights at night. — Correct: All tunnels require lights 24/7.

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Using full beam (high beam) in fog. — Correct: Fog reflects full beam; use dipped (low) beam.

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Assuming rain during day doesn't need lights. — Correct: Low visibility from rain requires headlights.

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Forgetting to use low beam for oncoming traffic. — Correct: Always use dipped beam when approaching other cars.

FAQ

When must you use headlights in Turkey?

At night (dusk to dawn), in all tunnels, and in low-visibility conditions (fog, rain, snow, dust).

Do tunnels always require headlights?

Yes — Turkish law mandates headlights in all tunnels, regardless of time of day.

What is dipped headlight and when to use it?

Dipped (low) beam is the standard setting for normal driving and approaching traffic. Full beam is only for empty roads at night.

Is it illegal to drive with lights during day in bad weather?

No — in fact, it is required. Low visibility (fog, rain, snow) mandates headlights for safety.