The "Principal road with priority" sign (3.03) is a crucial priority sign used in Switzerland to control traffic flow at junctions, narrow passages, or crossings. When you see this sign, it means you are on the main road and generally have priority over vehicles entering from side roads or other less prominent routes. Always be prepared to slow down or stop if necessary, and ensure you observe approaching traffic to confirm a safe gap before proceeding.
This sign clearly indicates you are on a principal road with priority, meaning other approaching traffic must yield to you. Accurate interpretation is vital for safe navigation and passing your theory test revision for Swiss traffic rules.
This priority sign controls the order of movement where traffic streams may conflict. On Swiss roads, priority signs are safety-critical because they decide whether the driver must stop, yield, continue on a priority road, or give way at a narrow section or crossing. The practical response is to slow early, observe every approach, and proceed only when the signed rule and the actual traffic gap are both safe. Official catalogue code: 3.03.
The "Principal road with priority" sign defines priority for the relevant junction, main road, narrow passage, or crossing. Use it to decide who may proceed first. Catalogue code 3.03.
Get clear, practical answers to the most common questions about the 3.03 - Principal road with priority 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 Swiss driving theory exam in Switzerland.
The 3.03 sign indicates that you are on a road that has priority over intersecting or merging roads. This means other drivers should yield to you. However, you must still ensure it is safe to proceed, especially if road layout or other factors might cause confusion.
When you see the 3.03 sign, it signifies you have priority. You should proceed with caution, observe approaching traffic from side roads, and be ready to stop or yield if another road user fails to respect your priority. The primary action is to confirm your priority is safe to exercise.
Yes, absolutely. Even with priority, you must not force other road users to brake or swerve suddenly. If another vehicle enters the junction improperly, or if visibility is poor, you must be prepared to stop to avoid an accident. Safety always comes first.
A common trap is assuming absolute priority. Learners might forget to check for other vehicles or mistakenly think the sign exempts them from observing traffic. Remember, priority must be exercised safely, and you should anticipate potential errors from others.
The 3.03 sign is specifically placed to define priority at junctions, narrow passages, or crossings where traffic streams might conflict. Its effect is tied to its specific placement and the road layout. Always consider the immediate environment and any supplementary signs or markings.
A clear reference image of the 3.03 - Principal road with priority road sign used in Switzerland.

The 3.03 - Principal road with priority road sign may also be known by these alternative names or terms.
The 3.03 - Principal road with priority road sign is part of the Swiss Priority Signs category, which groups together signs with similar rules and functions.
Effectively prepare for your theory test by comparing similar road signs, like the 'Principal road with priority' sign, with others in the priority group. Understanding these distinctions sharpens sign recognition and reduces exam errors, aiding your overall theory test revision.

Stop Sign (3.01): Complete Stop and Yield Before Entering Traffic.

Understand the 'End of Principal Road' sign (3.04) and its priority rules.

Understand the 'Crossing with a road without priority ahead' traffic sign (3.05)

Master the 'Crossroad with Priority to the Right' Rule (Sign 3.06)

Understand the 'Give Way to Oncoming Traffic' Priority Sign (3.09)

Master the 'Priority over Oncoming Traffic' Sign (3.10) in Switzerland

Understand the Level Crossing with Double Flashing Lights (Switzerland variant) priority sign.
After reviewing the full list of Swiss road signs, delve deeper into specific categories, practice recognition with quizzes, or explore detailed explanations for each sign. Continue your comprehensive preparation for the official theory driving test.
View All Swiss Road Signs