What Are Reduced Visibility Driving Rules?
Reduced visibility from rain, fog or snow requires immediate safety adjustments. Turkish law mandates headlights on, reduced speed and increased following distance to prevent collisions.
In reduced visibility (rain, fog, snow), drivers must use headlights, reduce speed to at least half the normal limit, and keep a safe distance. Turkish law requires these adjustments to prevent accidents.
- •Headlights optional
- •Standard speed limit
- •1–2 second gap
- •Headlights mandatory
- •Speed ≤50% limit
- •3–4 second gap
Step-by-step worked examples
Heavy rain with 80 km/h speed limit. Safe speed?
Heavy rain = visibility cut in half Reduce speed by 30–40% Safe speed: 50–60 km/h Headlights on (low beam) Maintain 100+ m distance
Fog reduces visibility to 30 m. Must do what?
Visibility < 50 m = extreme caution Use dipped headlights immediately Reduce speed to 30–40 km/h or less Increase distance to 150–200 m Avoid overtaking and sharp turns
Nighttime fog with rain. Which lights?
Fog + night = worst conditions Dipped (low-beam) headlights on Fog lights if equipped Tail lights + brake lights always Hazard lights only if stopped
Flashcards
Quick quiz
Q1.Fog visibility 20 m. Safe to drive 90 km/h?
Q2.Rain (no fog). Which lights?
Q3.Following distance in heavy rain, 100 km/h?
Q4.Why is high-beam bad in fog?
The full card deck, worked steps and AI-tutor support for “What Are Reduced Visibility Driving Rules?” are in Notek — study by hand before your exam.
Common mistakes
Using high-beam in fog to see further. — Correct: Always use dipped headlights in fog; high-beam creates dangerous glare.
Assuming posted speed limit is safe in rain. — Correct: Reduce speed 20–40% in heavy rain/fog, regardless of posted limit.
Following normal distance in reduced visibility. — Correct: Double or triple distance — braking takes much longer in wet/poor visibility.
Relying only on fog lights. — Correct: Fog lights are supplementary; dipped headlights are mandatory.
FAQ
What are reduced visibility driving rules?
Headlights on, speed reduced 20–50%, following distance 100–200 m, avoid overtaking. Applies in rain, fog, snow.
Do I need fog lights in rain?
No, but dipped headlights are mandatory. Fog lights are optional, supplementary only.
Can I overtake in heavy rain?
Only if visibility is sufficient to see oncoming traffic clearly; in most heavy rain, it is not.
Why is speed reduction so critical?
Braking distance increases exponentially with speed on wet roads. At double speed, stopping takes 4× longer.