Road narrowingArgentina
12. 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.
Wikimedia.org • Fernando Martello • CC BY-SA
What does a road-narrowing warning mean in Argentina?
Argentine narrowing warnings describe reduced width. Where the national Traffic Law applies, adapt speed to the road and do not overtake towards a junction, bridge or other dangerous place without the necessary clear view and space.
Warning for a road narrowing.
English • Traffic sign P-10(a) • Road narrows on both sides. Reduce speed and maintain a safe clearance.
Español • P-10(a) • Estrechamiento en ambas manos. Advierte que la calzada se estrecha por ambos lados. Reduce la velocidad y conserva una separación segura.
Sources
🔗 Commons.wikimedia.org
🔗 Servicios.infoleg.gob.ar • Anexo L vigente, sustituido por Decreto 196/2025, P.10
🔗 Servicios.infoleg.gob.ar • Anexo L 2025, lámina 06 • ANSV, manual de señales, PDF p. 9
SVG source: Original: Vialidad Nacional - Ministerio de Transporte - Presidencia de la Nación Vectorization: Civitas13 • Public domain • Original revision 2020-01-31. Wikimedia original unmodified.
Warning for a road narrowing on the right.
English • Traffic sign P-10(b) • Road narrows on the right. Available width decreases on the right.
Español • P-10(b) • Estrechamiento por la derecha. Advierte que disminuye el ancho disponible por el lado derecho de la calzada.
Sources
🔗 Commons.wikimedia.org
🔗 Servicios.infoleg.gob.ar • Anexo L vigente, sustituido por Decreto 196/2025, P.10
🔗 Servicios.infoleg.gob.ar • Anexo L 2025, lámina 06 • ANSV, manual de señales, PDF p. 9
SVG source: Original: Vialidad Nacional - Ministerio de Transporte - Presidencia de la Nación Vectorization: Civitas13 • Public domain • Original revision 2020-01-14. Wikimedia original unmodified.
Does a narrowing warning give you priority in Argentina?
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.
What should you do if traffic lanes merge at a narrowing in Argentina?
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.

Traffic rules
Argentina