The O4b 'Sinal de aproximação de saída' is a crucial Portuguese complementary sign indicating your approach to a separated intersection exit. It uses angled bars to show distances: 250m on motorways and 150m elsewhere. This sign is vital for planning your speed, lane position, and route, but remember it's informational – always adhere to general traffic rules, priority, and speed regulations.
Master the O4b Approach Sign, essential for navigating Portuguese road situations and passing your theory test. This sign provides crucial distance information for upcoming exits, aiding your safe planning and lane selection.
O4b - Sinal de aproximação de saída (Sinal de aproximação de saída) belongs to the Portuguese complementary signs category in the Regulamento de Sinalização do Trânsito. It uses the official information-sign format for its function, often a rectangular or square panel with a symbol, word, route, or facility indication. The official wording is: sinal de aproximação de saída: indicação da aproximação de uma saída em intersecção desnivelada, dada pelas barras inclinadas, que representam as distâncias à saída; cada barra corresponde a uma distância à saída de 250 m em auto-estradas e de 150 m nos restantes casos, devendo a indicação numérica constar na parte superior do sinal. It gives official information about the road environment, services, restrictions, facilities, or conditions that should influence safe planning. For theory preparation, connect the sign to a concrete driving decision: where to look, when to slow, whether to stop or yield, which route or lane to choose, and whether any panel changes the scope of the rule. On the road, interpret it together with markings, traffic lights, police directions, temporary works signs, and any additional panel placed with it. A strong exam answer explains both recognition and behaviour: not only what the sign is called, but what a safe and lawful driver must do next.
O4b - Sinal de aproximação de saída (Sinal de aproximação de saída) means that the driver must understand and apply this official Portuguese instruction: sinal de aproximação de saída: indicação da aproximação de uma saída em intersecção desnivelada, dada pelas barras inclinadas, que representam as distâncias à saída; cada barra corresponde a uma distância à saída de 250 m em auto-estradas e de 150 m nos restantes casos, devendo a indicação numérica constar na parte superior do sinal. In practical terms, you should use the information to plan speed, lane position, route choice, stopping, parking, or observation without treating it as permission to ignore other traffic rules.
Get clear, practical answers to the most common questions about the O4b - O4b - Sinal de aproximação de saída (Sinal de aproximação de saída) road sign. Learn how the sign works, what rules it represents, and how it affects real driving situations. This FAQ strengthens your understanding and supports accurate decision making for the Portuguese driving theory exam in Portugal.
The O4b sign, officially 'Sinal de aproximação de saída', tells you that an exit on a separated junction is approaching. The angled bars visually represent the distance to the exit, with each bar signifying 250m on motorways or 150m on other roads. It's an informational sign to help you prepare for the upcoming exit.
When you see the O4b sign, start planning your manoeuvre. This means checking your mirrors, considering which lane you need to be in, and adjusting your speed if necessary. It's your cue to prepare for exiting the main road, but it does not grant you priority or permit you to ignore other traffic rules.
The angled bars on the O4b sign represent the distance to the exit. On Portuguese motorways ('autoestradas'), each bar indicates 250 metres to the exit. On other types of roads, each bar represents a distance of 150 metres to the exit. Numeric indicators on the sign might also specify total distances.
A common mistake is misunderstanding the O4b sign as a command to exit immediately or as permission to change lanes abruptly. Learners might also forget that this is an informational sign and still need to obey general speed limits, priority rules, and indicator usage. Always combine the information from the O4b sign with all other traffic signs and road conditions.
No, the O4b 'Sinal de aproximação de saída' is an informational sign and does not grant you priority. While it tells you an exit is near, you must still yield to other traffic on the main road and follow the general rules of priority, especially if you need to cross lanes of traffic to reach the exit.
A clear reference image of the O4b - O4b - Sinal de aproximação de saída (Sinal de aproximação de saída) road sign used in Portugal.
The O4b - O4b - Sinal de aproximação de saída (Sinal de aproximação de saída) road sign may also be known by these alternative names or terms.
The O4b - O4b - Sinal de aproximação de saída (Sinal de aproximação de saída) road sign is part of the Complementary Signs category, which groups together signs with similar rules and functions.
Master Portuguese traffic rules by comparing similar road signs. This helps build strong sign recognition and reduces confusion for your theory test revision.
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O1b Hectometre Marker: Your Guide to Roadside Information
O1c: Understanding Portugal's Road Hectometre Markers
O1d Hectometre Marker: Use Roadside Markers for Safe Planning in Portugal
O2a Kilometric Marker Sign: Your Guide to Road Distance Information
Understand the O2b Kilometric Marker Road Sign in Portugal
Understand the O2c Kilometre Marker: Your Guide to Route Planning Information
Understand the O2d Road Sign: Your Kilometer Marker
After reviewing the full list, explore signs by specific categories such as warning, regulatory, or informational to deepen your understanding. Practise recognizing signs in context and prepare effectively for your Portuguese driving licence theory test.
All Portuguese Road Signs List