This I3b sign, known as 'Pré-aviso reduzido' in Portugal, is an advance direction sign. It provides crucial early information about upcoming routes, destinations, and lane allocations before you reach the actual decision point. By displaying arrows, route numbers, and place names, it allows you to plan your movements and choose the correct lane in advance, ensuring a safer and more predictable journey on Portuguese roads.
This crucial sign, 'Pré-aviso reduzido,' warns of upcoming lane changes or exits in Portugal, requiring early recognition for safe route decisions. Master its meaning for your theory test revision and confident driving.
I3b - Pré-aviso reduzido (Pré-aviso reduzido) belongs to the Portuguese advance direction signs category in the Regulamento de Sinalização do Trânsito. It uses arrows, panels, destinations, route numbers, lanes, or place names to guide the driver before the actual decision point. The official wording is: pré-aviso reduzido: deve conter os destinos de saída correspondentes. It supports route and lane decisions before the decision point, reducing late braking, hesitation, and unsafe lane changes. 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.
I3b - Pré-aviso reduzido (Pré-aviso reduzido) means that the driver must understand and apply this official Portuguese instruction: pré-aviso reduzido: deve conter os destinos de saída correspondentes. In practical terms, you should read the arrows, destinations, lane allocation, and route information early enough to choose a safe and predictable lane.
Get clear, practical answers to the most common questions about the I3b - I3b - Pré-aviso reduzido (Pré-aviso reduzido) 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 I3b 'Pré-aviso reduzido' sign is a Portuguese advance direction sign. It means you should pay attention to the arrows, destinations, and lane information shown to prepare for your route and make necessary lane changes or speed adjustments well before the actual junction or exit.
The term 'reduced' likely refers to the fact that it's a preliminary warning, giving you notice of upcoming route information that is closer than a standard advance warning sign, or it's intended to convey specific route details efficiently. It still requires you to read and understand the information early enough to react safely.
When you see the I3b sign, you should start observing the road ahead, including lane markings and any displayed route information. Use this early warning to decide which lane you need to be in for your intended destination and adjust your speed if necessary, all before the decision point.
A common trap is not recognising the need to react early. Learners might ignore the sign until the last moment, leading to sudden braking or unsafe lane changes, which are heavily penalised in the theory exam. Always anticipate and plan your route based on advance signs like I3b.
Not necessarily. The I3b sign provides information to help you confirm you are in the correct lane for your intended direction, or to alert you if you need to move to a different lane. It helps you confirm your current position or plan a necessary manoeuvre early and safely.
The I3b sign works in conjunction with road markings. The sign tells you *what* information to look for regarding your route, and the road markings (like lane lines, directional arrows, and destination indicators on the road surface) show you *how* to execute the manoeuvre safely and legally.
A clear reference image of the I3b - I3b - Pré-aviso reduzido (Pré-aviso reduzido) road sign used in Portugal.

The I3b - I3b - Pré-aviso reduzido (Pré-aviso reduzido) road sign may also be known by these alternative names or terms.
The I3b - I3b - Pré-aviso reduzido (Pré-aviso reduzido) road sign is part of the Advance Direction Signs category, which groups together signs with similar rules and functions.
Studying related road signs side-by-side helps you distinguish between similar symbols and improve recall for your Portuguese theory test. Mastering sign recognition and comparison is key for accurate interpretation and safe driving practices.

I1 Simplified Advance Warning: Prepare for Your Route Decisions

Understand the I2a Pré-aviso Gráfico: Your Graphic Advance Direction Sign

I2b: Understand Portuguese Graphical Advance Warning Signs for Route Planning

Prepare for the I2c Advance Graphic Warning Sign with Portuguese Driving Rules

Prepare for your route with the I2d graphic advance warning sign.

Understand the I2e Advance Graphic Pre-warning Sign for Route Planning

I2f Pré-aviso gráfico: Graphical Advance Direction Sign

I3a Reduced Advance Warning: Plan Your Route Early
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