The 'Minimum speed limit' sign (catalogue code 2.31) mandates a specific minimum speed you must maintain on the road ahead. Unlike signs indicating a maximum speed, this sign tells you not to drive slower than the indicated speed, unless traffic conditions or other rules prevent it. You should adjust your speed *before* reaching the sign, and remember that this instruction remains in effect until you see an end sign or a new speed limit is introduced.
Master the 'Minimum speed limit' sign (2.31) to ensure compliance with Swiss traffic laws and boost your theory test revision. This essential road sign interpretation helps you understand mandatory speed requirements and avoid penalties on Swiss roads.
This catalogue entry is used for a mandatory instruction, speed rule, stopping or parking control, lane or path assignment, or zone boundary. It tells drivers what action is required, restricted, started, or ended at that point in the road layout. A professional interpretation should connect the sign to the correct lane, path, bay, zone, or end sign, then check panels, arrows, vehicle symbols, and markings before deciding what is allowed. Official catalogue code: 2.31.
The "Minimum speed limit" sign sets or confirms the speed rule shown on the sign face. Drivers should adjust before the sign takes effect, not after passing it. Catalogue code 2.31.
Get clear, practical answers to the most common questions about the 2.31 - Minimum speed limit 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 2.31 sign indicates that you must not drive below the speed shown on the sign. It sets a mandatory lower limit for your speed. You are allowed to drive at that speed or faster, provided it is safe and legal.
You must ensure you are already driving at or above the indicated minimum speed *before* you pass the sign. The instruction takes effect from the point where the sign is placed.
The minimum speed limit remains in effect until you pass a sign that cancels it, such as an 'End of all restrictions' sign, or until a new speed limit instruction is given. Always be observant of subsequent signs and road markings.
Yes, you are permitted to drive slower than the indicated minimum speed if traffic conditions, road hazards, or other traffic rules necessitate it. For example, if there is heavy traffic, poor visibility, or you are approaching a pedestrian crossing, you should adjust your speed accordingly, even if it's below the stated minimum.
A common trap is assuming the minimum speed applies only when the road is clear. Learners might also forget that the restriction continues until explicitly ended, or they might not understand they need to prepare their speed before the sign itself. Always read supplementary panels or arrows that might specify the rule applies only to certain lanes or vehicle types.
A clear reference image of the 2.31 - Minimum speed limit road sign used in Switzerland.

The 2.31 - Minimum speed limit road sign may also be known by these alternative names or terms.
The 2.31 - Minimum speed limit road sign is part of the Swiss Mandatory and Parking Signs category, which groups together signs with similar rules and functions.
Reviewing related road signs like this minimum speed limit alongside others helps solidify your understanding and prevents common theory test errors. Master traffic sign comparison and improve your sign recognition for confident driving.

Understand the Maximum Speed Limit Sign (2.30)

Understand the Generally Valid Speed Limit Sign in Built-up Areas (2.30.1-D)

Obey the Generally Valid Speed Limit within Built-up Areas (French Variant)

Understand the Generally Valid Speed Limit Sign within Built-Up Areas (Italian Variant)

Understand the "Generally Valid Speed Limit Within Densely Built-Up Areas" Sign (2.30.1-R)

The 'Must Turn Right' sign (2.32) mandates your direction of travel.

Mandatory Left Turn: This Sign Dictates Your Direction!

Mandatory Instruction: You must go around the obstacle on the right side (Sign 2.34).
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