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German Road Signs and Traffic Sign Meanings

Know the Dreilanee Distance Marker Board on the Left (Sign 157-20) for Safe Driving

157-20 - Dreilanee distance marker board - installed on the left German road sign meaning

German road sign 157-20, officially 'Dreistreifige Bake - Aufstellung links', is a crucial danger warning sign. It alerts you to an upcoming hazard, most commonly a railway crossing sequence, and requires you to prepare early. Placed on the left side of the road, it signals the need to adapt your speed, observation, and readiness to stop well before reaching the actual danger. Always combine its warning with road markings, supplementary plates, and traffic conditions to ensure safe passage.

Interpreting the Left-Mounted Dreilanee Distance Marker

Master the meaning and application of German Road Sign 157-20, a crucial danger warning that prepares you for railway crossings. Effective interpretation of this left-mounted marker is vital for your theory test revision and safe driving practice.

Definition of 157-20

German road sign 157-20, officially designated "Dreistreifige Bake - Aufstellung links", belongs to the danger warning signs group. It prepares the driver for a railway crossing sequence, where speed, observation, and stopping readiness must be planned well before the tracks. You may see it in approaches to hazards, rural roads, urban conflict points, railway crossings, roadworks, and weather-sensitive sections, depending on how the road authority has arranged the location. This left-side version is used where the sign is placed on the left side of the carriageway or where a mirrored symbol fits the approach direction. Any left reference should be read as part of the direction, road side, lane arrangement, or placement shown by the sign. The practical meaning is not just the symbol itself, but the driving decision it triggers: adjust speed, position, priority, route choice, stopping behaviour, or attention before the situation becomes urgent. For learners, the key skill is anticipating what could go wrong before the hazard is visible. Always combine the sign with road markings, traffic lights, police instructions, and any supplementary plates at the same location.

Meaning of 157-20

German road sign 157-20 means "Dreilanee distance marker board - installed on the left" and is officially listed as "Dreistreifige Bake - Aufstellung links". In practice, it tells drivers to recognise the situation early, adapt before reaching the controlled area, and check whether markings or supplementary plates change how the rule applies.

Allowed actions for 157-20

Reduce speed early enough to keep full control before reaching the hazard.Scan both sides of the road, mirrors, lanes, shoulders, and crossing areas for the risk shown by the sign.Increase following distance and be ready to brake smoothly if another road user reacts suddenly.Choose a lane position that leaves safe clearance from the warned danger while staying within your lane and markings.Continue only when your speed and observation match the hazard, road surface, and available sight distance.

Prohibited actions for 157-20

Do not treat the warning as optional or wait until the hazard is directly in front of you.Do not overtake, accelerate, or follow closely when the sign points to reduced visibility, unstable road surface, crossing traffic, or vulnerable road users.Do not assume the danger is limited to the exact sign location; it may begin shortly after the sign and continue through the affected section.Do not ignore weather, darkness, traffic density, or roadworks conditions that can make the warned hazard more serious.

157-20 - Dreilanee distance marker board - installed on the left road sign FAQ

Get clear, practical answers to the most common questions about the 157-20 - Dreilanee distance marker board - installed on the left 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 German driving theory exam in Germany.

What is the main purpose of the Dreilanee distance marker board (Sign 157-20) on the left?

The main purpose of sign 157-20, the Dreilanee distance marker board installed on the left, is to warn drivers of an approaching hazard, typically a railway crossing. It signifies that you need to recognize the situation early and adapt your driving behavior, such as speed and observation, before you reach the danger.

What should I do when I see German road sign 157-20 on the left?

When you see sign 157-20 on the left, you should immediately be alert and start preparing for the hazard ahead. This means checking your mirrors, reducing your speed in advance, increasing your following distance, and being ready to stop if necessary. The key is to anticipate and react early, not when the hazard is immediately upon you.

Are there any specific actions prohibited when encountering sign 157-20?

Yes, you must not treat the warning as optional or wait until the hazard is directly in front of you. It's also prohibited to overtake, accelerate, or follow too closely, especially if visibility is reduced or the road surface is unstable. Always remember the danger may extend beyond the sign's immediate location.

How does the placement on the left side (Aufstellung links) affect the meaning of sign 157-20?

The 'Aufstellung links' (installed on the left) specification indicates the physical placement of the sign on the roadside. This helps drivers understand the context of the hazard relative to their lane or approach direction. It doesn't change the fundamental warning but confirms its position and relevance to drivers on that side of the carriageway.

What are common exam traps related to the Dreilanee distance marker board (Sign 157-20)?

A common exam trap is failing to prepare early enough. Learners might underestimate the importance of advanced preparation and react too late. Another trap is not considering other factors like weather or traffic density, which can increase the risk associated with the warned hazard. Always assume the sign requires proactive adaptation.

157-20 - Dreilanee distance marker board - installed on the left road sign image

A clear reference image of the 157-20 - Dreilanee distance marker board - installed on the left road sign used in Germany.

157-20 - Dreilanee distance marker board - installed on the left road sign

Other names for the 157-20 - Dreilanee distance marker board - installed on the left

The 157-20 - Dreilanee distance marker board - installed on the left road sign may also be known by these alternative names or terms.

German road sign 157-20German traffic sign 157-20StVO sign 157-20Dreilanee distance marker board - installed on the left signDreistreifige Bake - Aufstellung linksdanger warning signs 157-20

German Danger Warning Signs road sign category

The 157-20 - Dreilanee distance marker board - installed on the left road sign is part of the German Danger Warning Signs category, which groups together signs with similar rules and functions.

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