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Road narrows on left
WarningA3b

Road narrows on left

What does the “Road narrows on left” sign mean?

The “Road narrows on left” sign belongs to the “Warning” family of the French highway code. Warning signs are triangular with a red border. They flag a hazard or obstacle ahead so the driver slows down and takes extra care.

Updated 2 July 2026

Sign name

Français
Chaussée rétrécie par la gauche
العربية
ضيّق من اليسار
English
Road narrows on left

Other signs in the same family

Sources: Sécurité routière (securite-routiere.gouv.fr) and service-public.fr.