The German road sign 108-18, officially 'Gefälle 18%', is a danger warning sign indicating a very steep downhill slope of 18%. This sign alerts drivers to a potential reduction in control and grip, especially for heavier vehicles or in adverse weather. You should recognise this hazard early, adjust your speed, select an appropriate gear, and increase your following distance before reaching the descent.
This sign (108-18) warns of a significant 18% downward gradient, demanding careful speed adjustment and increased attention to maintain control on German roads. Proper road sign meaning interpretation is crucial for your theory test revision, helping you anticipate and navigate steep descents safely.
German road sign 108-18, officially designated "Gefälle 18%", 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.
German road sign 108-18 means "Descent 18%" and is officially listed as "Gefälle 18%". 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.
Get clear, practical answers to the most common questions about the 108-18 - Descent 18% 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.
Sign 108-18 warns drivers about a steep downhill gradient of 18%. This significant slope can affect vehicle control, braking effectiveness, and speed, especially for trucks and vehicles with trailers. It's crucial to anticipate this hazard and prepare accordingly before entering the downhill section.
Upon seeing sign 108-18, you must reduce your speed well before reaching the descent. Select a lower gear to help control your speed using engine braking, which also saves your brakes from overheating. Increase your following distance from the vehicle ahead and be prepared for potential slippery conditions.
A common trap is to only react when already on the steep slope, which is too late. Another mistake is not downshifting, leading to excessive brake use and potential overheating, especially on long descents. Learners might also forget to increase their following distance, risking a collision if the vehicle ahead brakes suddenly.
While all drivers should respect the warning of a steep descent, it's particularly critical for heavier vehicles like trucks, buses, and those towing trailers, as their momentum is greater and braking is less effective. However, all drivers should adjust their speed and prepare for reduced control on an 18% gradient.
Yes, supplementary plates ('Zusatzzeichen') can modify the meaning or application of sign 108-18. For example, a plate might specify the length of the descent, indicate specific conditions like wet surfaces, or show which types of vehicles the warning is most critical for. Always check for such additional signs.
A clear reference image of the 108-18 - Descent 18% road sign used in Germany.

The 108-18 - Descent 18% road sign may also be known by these alternative names or terms.
The 108-18 - Descent 18% road sign is part of the German Danger Warning Signs category, which groups together signs with similar rules and functions.
Reviewing closely related road signs, like variations in danger warnings or regulatory symbols, sharpens your recognition and reduces confusion. This comparative study is essential for accurate theory test revision and ensures you can correctly identify similar traffic signs during your exam.

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