One-way trafficPortugal
Traffic rules
Portugal
1. One-way traffic
One-way traffic means that vehicles on a road or carriageway may travel only in one designated direction. The permitted direction is normally indicated by traffic signs, lane arrows or road markings.
Some road users, such as cyclists or public-transport vehicles, may be allowed to travel in the opposite direction when signs expressly permit it. A one-way road does not by itself determine the speed limit, priority or parking rules.
How should I read a one-way restriction in Portugal?
The one-way sign indicates a road carrying traffic in one direction, or the end of a temporarily two-way section. Follow its direction and any supplementary information; a compulsory turn sign at a junction gives a different instruction.
Road with one-way traffic.
English • Traffic sign H3 • One-way traffic. Indicates a one-way road or the end of the two-way section announced by sign A25 or H31d.
Português • H3 • Trânsito de sentido único. Indicação de via em que o trânsito se faz apenas num sentido ou indicação de que terminou o troço de via em que o trânsito se fazia nos dois sentidos, anunciado pelo sinal A25 ou pelo sinal H31d.
Sources
🔗 Commons.wikimedia.org
🔗 Diariodarepublica.pt • Regulamento de Sinalização do Trânsito • artigo 34.º • H3
🔗 Ansr.pt • Republicação oficial retificada • H3 • página 19
Replacement SVG: Commons.wikimedia.org • Wikimedia Commons original • No machine-readable author provided. Benedicto16 assumed (based on copyright claims). • Public domain • Original revision 2025-11-30. Wikimedia original unmodified.
Artwork verified against Ansr.pt • official published diagram H3.
Image via Commons.wikimedia.org
No machine-readable author provided. Benedicto16 assumed (based on copyright claims). • Public domain • Source revision 2025-11-30. Wikimedia original unmodified.
No entry.
English • Traffic sign C1 • No entry. Traffic is prohibited in the direction faced by the sign.
Português • C1 • Sentido proibido. Indicação da proibição de transitar no sentido para o qual o sinal está orientado.
Sources
🔗 Commons.wikimedia.org
🔗 Diariodarepublica.pt • Regulamento de Sinalização do Trânsito • artigo 24.º • C1
🔗 Ansr.pt • Republicação oficial retificada • C1 • página 13
Replacement SVG: Commons.wikimedia.org • Wikimedia Commons original • Benedicto16 • Public domain • Original revision 2015-05-25. Wikimedia original unmodified.
Artwork verified against Ansr.pt • official published diagram C1.
Image via Commons.wikimedia.org
Benedicto16 • Public domain • Source revision 2015-05-25. Wikimedia original unmodified.
May cyclists travel against the general traffic direction in Portugal?
Do not assume cyclists are exempt from a road’s direction restriction. Check whether the applicable signs, local traffic arrangement or separately designated cycle facility actually authorise movement in the opposite direction; an ordinary bicycle-route sign is not enough.
Does one-way traffic give me priority or a different speed limit in Portugal?
A one-way restriction concerns direction. Continue to follow the applicable speed limit, signals, give-way or stop controls and junction-priority rules. Where authorised counterflow traffic exists, check for it before turning or crossing; your permitted direction is not automatic junction priority.
