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Automotive glossary

Warning Triangle

A warning triangle is a reflective triangle placed behind a broken-down or crashed vehicle to warn approaching traffic.

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What is Warning Triangle?

Many countries require one to be carried in every car. It is placed well behind the vehicle, further on fast roads. It must meet an approved standard, often shown by an ECE mark. Some countries have additional rules; for example, Spain has introduced a connected warning beacon that replaces triangles. Check the rules before driving abroad.

How it works

Its red reflective and fluorescent surfaces catch the headlights of approaching vehicles.

Why it matters for your car

Put on a high-visibility vest and watch traffic when walking to place it. On motorways, safety comes first; follow local rules about leaving the vehicle.

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