171. ひょう
ひょうは、視界を低下させ、路面を滑りやすくし、突然危険な運転条件を作ります。道路上にたまると氷や小石のようにタイヤグリップを低下させ、大きなひょうはフロントガラスや車体を損傷することもあります。減速し、車間距離を増やし、急な操舵・制動を避け、状況が激しい場合は安全な場所へ停止して通過を待つことを検討します。
Why is hail dangerous when driving?
Hail can reduce visibility and tyre grip, make the road slippery and distract drivers because of the sudden noise and impact of hailstones.
How should you drive during a hailstorm?
Reduce speed, increase your following distance and use smooth steering and braking. If the hail becomes severe or visibility is very poor, consider stopping at a safe place away from moving traffic.
Can hail make a road slippery?
Yes. Hailstones can collect on the road and create a slippery surface with reduced tyre grip, particularly when mixed with rain or melting ice.
Can hail damage a vehicle?
Yes. Large hailstones can damage windscreens, windows, mirrors and vehicle bodywork. Severe hail can also reduce visibility if glass becomes cracked or damaged.
Should you use headlights during hail?
Use the lights required by local traffic rules when hail or other weather reduces visibility. Lighting requirements vary between countries.
Is it safer to stop during severe hail?
If visibility or road conditions become too dangerous, it may be safer to stop at a suitable place away from moving traffic and continue when conditions improve.

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