The 2.51-D-F 'Customs' sign, a mandatory instruction sign used in Switzerland, indicates specific requirements regarding driving, lane usage, parking, or zones. Always interpret this sign in conjunction with any accompanying arrows, road markings, supplementary panels, or end signs to understand precisely how it applies to your current situation. Failure to adhere to its directive can lead to penalties and is a common point of focus in theory exams.
This specific customs sign provides crucial mandatory instructions relevant to Swiss traffic laws, helping you navigate border areas or designated zones correctly. Mastering its interpretation is key for your theory test revision and understanding official road sign meanings in Switzerland.
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: 2.51-D-F.
The "Customs (German and French variant)" sign gives a mandatory driving, lane, path, parking, stopping, or zone instruction. Read it with arrows, bay markings, panels, and end signs. Catalogue code 2.51-D-F.
Get clear, practical answers to the most common questions about the 2.51-D-F - Customs (German and French variant) 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 2.51-D-F Customs sign is a mandatory instruction. It dictates specific actions you must take, such as lane choice, speed limit, parking, or zone entry/exit, depending on what is indicated by the sign itself, arrows, markings, or supplementary panels.
You must follow the instruction given by the 2.51-D-F Customs sign. This could mean using a specific lane, adhering to a certain speed, or parking in a designated area. Always check for additional information like arrows or panels to understand the precise application.
A common trap is ignoring the sign if the road seems straightforward or if you think you know the route. Learners may also fail to notice or understand supplementary panels or arrows that modify the sign's meaning, or not recognise when the instruction ends, often tested in theory exams.
Yes, it's crucial. The 2.51-D-F Customs sign is often used with additional elements like arrows, bay markings, supplementary panels, or specific vehicle symbols. It also needs to be interpreted with end signs that signal the termination of the mandatory instruction.
If there are no supplementary panels or arrows, the instruction applies directly from the point where the sign is displayed. However, you must still be vigilant for road markings and end signs that indicate when the mandatory instruction is no longer in effect.
A clear reference image of the 2.51-D-F - Customs (German and French variant) road sign used in Switzerland.

The 2.51-D-F - Customs (German and French variant) road sign may also be known by these alternative names or terms.
The 2.51-D-F - Customs (German and French variant) road sign is part of the Swiss Mandatory and Parking Signs category, which groups together signs with similar rules and functions.
Reviewing similar road signs side-by-side helps solidify your understanding and prevents common errors during your theory test revision. Effective traffic sign comparison is key to mastering recognition and ensuring you recall the correct meaning under pressure.

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)

Obey the Minimum Speed Limit Sign (2.31) on Swiss Roads

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

Mandatory Left Turn: This Sign Dictates Your Direction!
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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: 2.51-F-I.
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: 2.63.
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.
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