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Particular accident hazard
The supplementary sign shows which type of accident is common on the section: rear-end collision.
When you see the sign
Be prepared for rear-end collisions, which are particularly common on this stretch of road, and increase the distance to the vehicle in front. Adjust your speed so that you can stop in a controlled manner in the event of a queue, sudden braking or other sudden changes in traffic, while also following the main sign above the supplementary sign.
Rules
- Sign 817.5 is a supplementary sign and must be interpreted together with the main sign it is placed below.
- The supplementary sign indicates that rear-end collisions are a particularly common type of accident on the stretch of road in question.
- The sign does not indicate a specific speed limit, distance or time period.
- Drivers must always keep a sufficient distance from the vehicle in front to avoid a collision if that vehicle stops or reduces its speed.
Tips
- Increase the distance to the vehicle in front, especially in heavy traffic, poor visibility or slippery conditions.
- Look well ahead and watch early for brake lights, queues and places where traffic often comes to a stop.
- Brake smoothly and early when possible, giving the driver behind more time to react.
- Avoid unnecessary lane changes and sudden changes in speed on the indicated stretch of road.
Common misconceptions
- Some people think the numbers or symbol indicate the distance to a hazard, but this supplementary sign shows which type of accident is common.
- Some interpret the sign as a prohibition or a separate speed limit, even though it only provides additional information for the main sign.
- Some focus only on the vehicle behind, but the most important preventive measure is to keep a safe distance and monitor traffic well ahead.
Test yourself
Easy
What does this supplementary plate mean?
- AIt states that rear-end collisions are a particularly common type of accident on the section.
- BIt states how long the road section is for which the main sign applies.
- CIt states the distance to the place where the main sign begins to apply.
- DIt states that the main sign applies only to passenger cars.
Medium
You see this sign and are approaching dense traffic with varying speed. What should you do?
- ABrake immediately to a specific speed regardless of the traffic conditions.
- BIncrease the distance to the vehicle in front and follow the traffic well ahead.
- CWatch mostly in the mirror and let the vehicle in front control the pace.
- DKeep a short distance to the vehicle in front to avoid overtaking.
Hard
How should this supplementary plate be understood together with the main sign?
- AIt replaces the main sign by introducing a separate lower speed limit.
- BIt supplements the main sign by showing the distance until the danger begins.
- CIt supplements the main sign by showing the length of the section to which it applies.
- DIt supplements the main sign by showing which type of accident is particularly common.
Theory test tip
In the theory test, the sign may be confused with supplementary signs indicating distance or extent. Look for an illustration showing a type of accident: the message is that rear-end collisions are common, not how far away the hazard is or how long a main sign applies.
Did you know
The sign is part of a series of supplementary signs used to show which type of accident occurs particularly often, allowing the warning to be adapted to the accident pattern on the specific stretch of road.
Frequently asked questions
Does the supplementary sign require me to drive at a specific speed?
No, the supplementary sign does not set a specific speed. However, you must adjust your speed to the traffic, visibility, road conditions and the risk of the traffic ahead coming to a stop.
What is the most important thing I should do on this stretch of road?
Keep a greater distance from the vehicle in front and watch well ahead in the traffic. This gives you more time to react to a queue or sudden braking.
Does the supplementary sign apply on its own?
No, it is a supplementary sign and must be read together with the main sign above it. It specifies that the particular accident risk concerns rear-end collisions.
Does the sign show how far it is to the dangerous stretch of road?
No, it shows which type of accident is common. The distance to a location or the extent of a stretch of road is indicated by other supplementary signs.
Practise for the theory test
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