The 'Traffic lights' sign (1.27) is an advance warning designed to give you crucial time to prepare for upcoming traffic signals. It prompts you to adjust your speed, observation, and lane position well before you reach the lights. This sign is part of Switzerland's system to ensure drivers anticipate potential hazards and maintain control, especially in complex traffic situations.
This Swiss warning sign (1.27) advises drivers to anticipate upcoming traffic lights and adjust their driving behaviour accordingly. Proper interpretation is crucial for your theory test revision, helping you navigate intersections safely and maintain control.
This warning sign is used as an early planning cue, not as a last-second prompt. On Swiss roads it appears before the relevant hazard so the driver can adjust speed, following distance, lane position, and observation before the situation becomes demanding. In theory training, the expected answer should connect the sign with a concrete behaviour change: anticipate the hazard, keep control, and avoid overtaking or sudden manoeuvres where the warning reduces the safety margin. Official catalogue code: 1.27.
The "Traffic lights" sign is an advance hazard warning. It gives the driver time to lower speed if needed, widen observation, and prepare for the signed hazard before reaching the danger point. Catalogue code 1.27.
Get clear, practical answers to the most common questions about the 1.27 - Traffic lights 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 primary purpose of the 1.27 'Traffic lights' warning sign is to alert you in advance that traffic lights are ahead. This allows you to reduce speed if necessary, widen your observation, and prepare to stop or proceed safely without sudden manoeuvres, ensuring a smoother and safer approach to the junction.
When you see the 1.27 warning sign, you should begin to anticipate the traffic lights. This means actively scanning the road ahead, checking your mirrors, and being ready to adjust your speed or following distance. It’s a cue to be more prepared for potential stops or changes in traffic flow.
A common mistake is to treat the 1.27 sign as a mere decoration and not react until the traffic lights are directly in view. Another error is continuing to overtake or making abrupt lane changes, which can be dangerous if the lights are about to change or if there's heavy traffic. The sign is an advance warning, so proactive preparation is key.
No, the 1.27 sign does not mean you must stop immediately. It's an advance warning to prepare you for traffic lights that are further down the road. Your decision to stop or proceed depends on the actual signal phase displayed by the traffic lights themselves when you reach them.
The placement is crucial. This sign is always positioned in advance of the traffic lights, giving you ample time to react. The further the sign is placed, the earlier you should start preparing to slow down or change your driving behaviour, ensuring you maintain a safe margin.
A clear reference image of the 1.27 - Traffic lights road sign used in Switzerland.

The 1.27 - Traffic lights road sign may also be known by these alternative names or terms.
The 1.27 - Traffic lights road sign is part of the Swiss Warning Signs category, which groups together signs with similar rules and functions.
Studying related road signs side-by-side enhances your recognition and reduces errors on the theory test. Comparing signs like 'Traffic lights' with other advance warnings aids memorisation and ensures you understand subtle differences for safe driving in Switzerland.

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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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