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Particular accident hazard
The supplementary sign shows which type of accident is common on the section: head-on collision on a straight section.
When you see the sign
Be prepared for an increased risk of head-on collisions, even if the road is straight and visibility is good. Adjust your speed, keep a good distance from the centre line, and pay extra close attention to oncoming traffic and possible overtaking.
Rules
- The supplementary plate indicates that head-on collisions on straight sections are a common type of accident on the road section in question.
- The plate must be interpreted together with the main sign above it and does not impose an independent requirement or prohibition.
- The sign does not set a separate speed limit, but drivers must always adjust their speed so that driving is safe and appropriate.
- You must keep a sufficient distance from oncoming vehicles and position your car well within your own lane.
- Overtaking may only be carried out when you have sufficient clear visibility and can do so without danger.
Tips
- Avoid driving unnecessarily close to the centre line, especially when meeting large vehicles.
- Watch out for oncoming vehicles that cross the centre line or attempt a risky overtaking manoeuvre.
- Reduce your speed if the road is narrow, visibility is reduced, or road conditions make it difficult to maintain a steady course.
- Keep your eyes focused well ahead, but also check your position within your own lane.
Common misconceptions
- Some people think the sign warns of dangerous bends, but it concerns head-on collisions on a straight section of road.
- Some interpret the symbol as a ban on overtaking, but the sign does not introduce such a prohibition.
- Some people think the sign indicates a distance or extent, even though it actually shows which type of accident is common.
Test yourself
Easy
What does the supplementary plate provide information about?
- AThat head-on collisions on a straight section are common here
- BThat overtaking is prohibited on the entire section
- CThat dangerous bends frequently occur on the section
- DThat the main sign begins to apply after the indicated distance
Medium
You are driving on a straight road section and see this supplementary plate. A vehicle is approaching in the opposite direction, and you are considering overtaking the car in front. What should you do?
- AStop in your own lane, wait for the oncoming vehicle and then continue overtaking
- BIncrease your speed, actively use the centre line and complete the overtaking as quickly as possible
- CMaintain your speed, move close to the centre line and overtake before the oncoming vehicle arrives
- DAdjust your speed, stay well within your own lane and only overtake with sufficient clear visibility
Hard
What effect does the supplementary plate have when it is placed below a main sign?
- AIt indicates the extent of the main sign and at the same time introduces a lower speed limit
- BIt indicates the distance to the hazard and at the same time introduces a prohibition on overtaking
- CIt indicates when the main sign applies and at the same time imposes an obligation to stop
- DIt explains a common type of accident, but does not on its own introduce a prohibition on overtaking
Theory test tip
In the theory test, the trap may be that you choose “overtaking prohibited” or “distance to hazard”. The correct meaning is that the supplementary plate indicates that head-on collisions on a straight section are a common type of accident.
Did you know
Skilt 817 comes in several variants showing different types of accidents. Variant 817.4 is used to alert drivers that even an apparently simple, straight section of road may have a documented risk of serious head-on collisions.
Frequently asked questions
Does the sign mean that I must drive at a particular speed?
No, the supplementary plate does not set a specific speed limit. However, you must still adjust your speed to the accident risk, visibility, road width, traffic and road conditions.
Is it prohibited to overtake on this section?
Not as a result of this supplementary plate alone. Overtaking may nevertheless be prohibited by another sign or road marking, and it must always be possible to carry it out safely.
Why are head-on collisions indicated when the road is straight?
Straight sections can lead to high speeds, inattention or risky overtaking. The sign indicates that head-on collisions are in fact a common type of accident on this section.
Does the supplementary plate apply on its own?
No, it must be read together with the main sign above it. It clarifies which particular accident risk the driver should be aware of.
Practise for the theory test
Teorio has the complete theory syllabus in your own language. Download the app and practise whenever it suits you.
