The PA13b sign, known as 'Diagrama de via com prioridade', is an additional panel in Portugal that clarifies priority road rules. It must always be read with a main sign, often the B3 'Yield' sign, to show exactly how the priority road changes direction or lane. This panel is crucial for understanding which path has priority and how you should navigate junctions or complex road layouts, ensuring you comply with Portuguese traffic law and prepare effectively for your theory exam.
Master the PA13b Diagrama de via com prioridade to correctly interpret changes in priority on your route, a crucial step for your Portuguese theory test revision. This sign explanation details how to recognise and apply priority route changes, ensuring safe driving and exam success.
PA13b - Diagrama de via com prioridade (Diagrama de via com prioridade) belongs to the Portuguese additional panels category in the Regulamento de Sinalização do Trânsito. Visually, this is a supplementary plate placed with a main sign; its position matters because it completes or limits that main sign instead of standing alone. The official wording is: diagrama de via com prioridade: destinam-se a indicar que a via com prioridade muda de direcção; deve utilizar-se conjuntamente com o sinal B3; o traço largo representa a via com prioridade. It must be read together with the main sign; alone it is incomplete, but together it can change distance, duration, direction, affected users, or exceptions. 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.
PA13b - Diagrama de via com prioridade (Diagrama de via com prioridade) means that the driver must understand and apply this official Portuguese instruction: diagrama de via com prioridade: destinam-se a indicar que a via com prioridade muda de direcção; deve utilizar-se conjuntamente com o sinal B3; o traço largo representa a via com prioridade. In practical terms, you should read the panel together with the main sign and apply the distance, extent, direction, time, vehicle class, exception, or condition shown on the panel.
Get clear, practical answers to the most common questions about the PA13b - PA13b - Diagrama de via com prioridade (Diagrama de via com prioridade) 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 PA13b sign is a supplementary panel used with main traffic signs, typically in Portugal. It visually illustrates how the priority road changes direction or lane. You must interpret it alongside the main sign to understand the precise route that maintains priority.
You must not read the PA13b sign in isolation. Always connect it to the main sign it accompanies, most often a priority or yield sign like B3. The panel will show the specific path that has priority, and you must adjust your driving accordingly, yielding if your route is not the one indicated as having priority.
The PA13b sign is always an additional panel and is never used alone. It serves to modify or clarify the meaning of a primary traffic sign. You should always look for the main sign to which the PA13b panel is attached to understand its full directive.
A common trap is forgetting that the PA13b sign requires interpretation with another sign. Learners might also misinterpret the diagram itself, failing to correctly identify which path has priority. Always carefully observe both the main sign and the PA13b panel to determine the correct action.
Yes, that is precisely its function. The 'Diagrama de via com prioridade' indicates that the priority road is changing its course. The diagram will clearly show the route that continues to have priority, and it's your responsibility to follow this instruction correctly to avoid dangerous situations.
A clear reference image of the PA13b - PA13b - Diagrama de via com prioridade (Diagrama de via com prioridade) road sign used in Portugal.

The PA13b - PA13b - Diagrama de via com prioridade (Diagrama de via com prioridade) road sign may also be known by these alternative names or terms.
The PA13b - PA13b - Diagrama de via com prioridade (Diagrama de via com prioridade) road sign is part of the Additional Panels category, which groups together signs with similar rules and functions.
Reviewing related road signs side-by-side helps solidify your understanding and improves recall for the Portuguese driving theory test. Sharpen your sign recognition skills by comparing similar traffic signs and deepen your exam preparation.

PA10a: The Additional Panel That Modifies Road Sign Instructions

PA10b: Understand and Apply Instructions on Additional Indicator Panels

PA10c Additional Panel: Modifying Main Signs for Electric Vehicles

PA10d Panel: Specific Instructions for Electric Vehicles While Charging

PA10e: Additional Panel indicating a specific application or exception for the main sign.

PA11a: This Additional Panel Specifies Which Vehicles a Sign Applies To

PA11b: This Additional Panel Specifies Which Vehicles the Main Sign Applies To

Understand Additional Panels: PA11c Applies Rules to Specific Vehicles
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