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German Road Signs and Traffic Sign Meanings

Master the 'Descent 21%' Warning Sign (108-21) for Safe Driving

108-21 - Descent 21% German road sign meaning

German road sign 108-21 warns you about a significant downhill gradient of 21%. As a danger warning sign, it’s crucial to recognise this early and adapt your driving before you reach the steepest part. This means adjusting your speed and gear selection to maintain control, especially in challenging conditions or when other factors like road markings or supplementary plates modify its meaning. Prepare yourself for this hazard by anticipating potential issues and ensuring your vehicle is ready.

Understanding Descent 21% (Gefälle 21%)

This German road sign 108-21 warns of a steep 21% descent, requiring drivers to adjust speed and anticipate challenges before reaching the gradient. Crucial for your theory test revision, this sign's interpretation helps you safely navigate down steep inclines and understand road sign meaning.

Definition of 108-21

German road sign 108-21, officially designated "Gefälle 21%", belongs to the danger warning signs group. It warns about a road-layout, clearance, weather, or surface condition that can reduce control, sight distance, grip, or available space before the driver reaches the hazard. 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. 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 108-21

German road sign 108-21 means "Descent 21%" and is officially listed as "Gefälle 21%". 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 108-21

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 108-21

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.

108-21 - Descent 21% road sign FAQ

Get clear, practical answers to the most common questions about the 108-21 - Descent 21% 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 does the 'Descent 21%' road sign (108-21) mean?

Sign 108-21, officially 'Gefälle 21%', is a danger warning sign indicating a steep downhill slope. The '21%' specifically quantifies the steepness of the gradient, alerting you to a potential loss of control or increased braking distance.

How should I drive when I see the 'Descent 21%' sign (108-21)?

When you see sign 108-21, you must reduce your speed early enough to maintain full control before entering the descent. Select an appropriate lower gear to help control your speed with engine braking, rather than relying solely on your brakes, which can overheat on long or steep descents.

Are there any specific dangers associated with a 21% descent?

A 21% descent is very steep. Dangers include your vehicle accelerating rapidly, brakes overheating and becoming less effective, difficulty in steering, and increased risk of skidding, especially in wet or icy conditions. You must also be extra cautious of vehicles ahead and be prepared for them to brake suddenly.

What should I watch out for in addition to the 'Descent 21%' sign (108-21) itself?

Always consider supplementary plates beneath sign 108-21, as they can specify the length of the descent or other conditions. Also, pay close attention to road markings, weather conditions, traffic density, and the behaviour of other road users, as these can all increase the hazard.

What are common theory test mistakes related to sign 108-21?

Common mistakes include not reacting early enough, failing to select a lower gear, and forgetting to increase the following distance. Learners might also underestimate the severity of a 21% gradient or ignore supplementary signs that modify the warning.

108-21 - Descent 21% road sign image

A clear reference image of the 108-21 - Descent 21% road sign used in Germany.

108-21 - Descent 21% road sign

Other names for the 108-21 - Descent 21%

The 108-21 - Descent 21% road sign may also be known by these alternative names or terms.

German road sign 108-21German traffic sign 108-21StVO sign 108-21Descent 21% signGefälle 21%danger warning signs 108-21

German Danger Warning Signs road sign category

The 108-21 - Descent 21% road sign is part of the German Danger Warning Signs category, which groups together signs with similar rules and functions.

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