Road narrowingFrance

An introduction to the traffic rules and road signs of France. Learn about driving, road safety and much more in our illustrated book, with answers to frequently asked questions.

For informational purposes only. Always follow official regulations. Some content and images were created with AI assistance.


29. Road narrowing

A road narrowing is a section where the available width of the road or carriageway becomes smaller. The narrowing may occur on both sides, on one side only, or because one or more traffic lanes end.

Drivers should reduce speed, observe approaching and adjacent traffic, maintain sufficient lateral clearance and merge when necessary. Warning signs do not always determine priority, so drivers must follow any priority signs, lane markings and local traffic rules.

Road-narrowing warning sign on departmental road D94. (Drôme, France)
Wikimedia.org • Marc Mongenet • CC BY-SA
What does a road-narrowing warning mean in France?

French narrowing warnings identify a reduction of road width on both sides or on one side. They warn of the hazard; any alternating-flow priority or signal arrangement must be read separately.

🔗 legifrance.gouv.fr • French Road Code — R412-9–10, R414-1–3, R421-3

Warning for a road narrowing. Warning for a road narrowing.

English • Traffic sign A3 • Road narrows.

Français • Panneau A3 • Chaussée rétrécie.

Sources

🔗 Commons.wikimedia.org
🔗 Equipementsdelaroute.cerema.fr • Arrêté du 24 novembre 1967

© Roulex 45 et les contributeurs Wikimedia • CC BY-SA 3.0 • SVG original non modifié.

Image via Commons.wikimedia.org
Roulex_45 • CC BY-SA 3.0 • Source revision 2013-07-05. Wikimedia original unmodified.

Warning for a road narrowing on the left. Warning for a road narrowing on the left.

English • Traffic sign A3b • Road narrows on the left.

Français • Panneau A3b • Chaussée rétrécie par la gauche.

Sources

🔗 Commons.wikimedia.org
🔗 Equipementsdelaroute.cerema.fr • Arrêté du 24 novembre 1967

© Roulex 45 et les contributeurs Wikimedia • CC BY-SA 3.0 • SVG original non modifié.

Image via Commons.wikimedia.org
Roulex 45 • CC BY-SA 3.0 • Source revision 2013-07-05. Wikimedia original unmodified.

Warning for a road narrowing on the right. Warning for a road narrowing on the right.

English • Traffic sign A3a • Road narrows on the right.

Français • Panneau A3a • Chaussée rétrécie par la droite.

Sources

🔗 Commons.wikimedia.org
🔗 Equipementsdelaroute.cerema.fr • Arrêté du 24 novembre 1967

© Roulex 45 et les contributeurs Wikimedia • CC BY-SA 3.0 • SVG original non modifié.

Image via Commons.wikimedia.org
Roulex 45 • CC BY-SA 3.0 • Source revision 2013-07-05. Wikimedia original unmodified.

Does a narrowing warning give you priority in France?

No. A warning describes the reduced width, rather than allocating priority or setting a numerical speed limit. Follow any separate priority signs, signals and meeting rules, and slow enough to pass safely or wait before entering.

🔗 legifrance.gouv.fr • French Road Code — R412-9–10, R414-1–3, R421-3

What should you do if traffic lanes merge at a narrowing in France?

Read the lane-ending signs and markings, check surrounding traffic and signal any lane change as required. Apply the local merging rule and enter only when safe. Do not assume the driver in an ending lane always has priority, or confuse merging with meeting oncoming traffic.

🔗 legifrance.gouv.fr • French Road Code — R412-9–10, R414-1–3, R421-3

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