Princip of Limited Trust in Traffic Law: Case Law and Defence Tips for 2026

1.4.2026 | ARROWS law firm

The principle of limited trust allows drivers to rely on the fact that others will comply with the rules unless the circumstances indicate otherwise. The Constitutional Court has corrected a strict interpretation of this principle, yet law enforcement authorities often misinterpret it. We explain how the principle is applied under current case law and what to watch out for when preparing a defence in 2026.

The photograph shows an expert addressing issues related to the principle of limited trust.

Article contents

What the principle of limited trust is and why it is key in law
How the principle of limited trust works in practice
Documentation and its role in court argumentation
Common mistakes in argumentation
Specific legal standards following the Constitutional Court’s decision

Key takeaways

The principle of limited trust is not a “free pass” for drivers — if a driver behaves unpredictably or dangerously, this principle will usually not protect them.
What matters is an objective assessment of whether the driver had a duty and a real possibility to foresee breaches of traffic rules by other road users.
The Constitutional Court of the Czech Republic corrected the Supreme Court’s earlier strict case law, which often required an unrealistic level of caution from drivers.
Incorrect application of the principle may lead to an unjust conviction, incorrect determination of contributory fault, or unjustified claims for damages.
High-quality legal representation by a traffic law specialist is important for a proper defence and for formulating the factual narrative.

What the principle of limited trust is and why it is key in law

The principle of limited trust in road traffic is a legal doctrine based on a logical assumption necessary for the smooth flow of traffic. Road users cannot constantly assume that everyone else will breach the rules; otherwise, traffic would come to a standstill. The Czech legal system and established case law allow drivers to rely on other road users complying with traffic rules, unless the specific situation indicates otherwise.

In the past, the Czech courts struggled with a very strict interpretation of the duty to exercise increased caution, with courts requiring an extreme degree of foresight. In line with these older decisions, lower courts then found drivers at fault even in cases where reacting to a sudden obstacle or another road user’s mistake was, in human terms, almost impossible.

A major shift was brought about by the case law of the Constitutional Court of the Czech Republic, in particular key rulings (e.g., file nos. III. ÚS 2065/15 and IV. ÚS 3159/15). In these, the Constitutional Court opposed an expansive interpretation of the duty of caution. It held that the requirements imposed on drivers must not exceed what is realistically achievable in ordinary traffic. In practice, it is therefore often crucial to correctly assess how this standard translates into criminal liability as well as into injured parties’ claims, which typically falls within the scope of employment law when dealing with workplace accidents and an employer’s liability for traffic accidents occurring in the course of work. In situations where a driver’s fault and the impact of the Constitutional Court’s decisions on criminal proceedings are assessed, it may be useful to consult the approach within criminal law. In this way, it brought the principle of limited trust back within constitutionally compliant limits.

This is a principle that affects thousands of accidents every year, and its interpretation directly influences the assessment of fault in criminal or misdemeanour proceedings. Proper application of this principle also affects the amount of damages and the determination of the degree of contributory fault of the individual participants in an accident.

The legal development of the principle of limited trust in Czech case law

To understand the current application, it is necessary to know the context of legal developments in the Czech Republic. The principle itself has never been denied; what has always been disputed is the level of caution that courts required from drivers in crisis situations.

In earlier years, the Supreme Court took the view that, for example, when reversing or turning, a driver must make maximum efforts to prevent an accident. Although the Road Traffic Act requires, in certain cases, that a competent person be secured, courts often extended this duty to situations where it was disproportionate and impracticable in ordinary traffic.

Turning-point cases were those in which the Supreme Court inferred drivers’ fault even where the injured party had grossly breached the rules. The Constitutional Court, however, quashed such decisions, stating that a driver cannot be required to foresee, at every moment, gross breaches of the rules by others if nothing indicates that. It emphasised that a driver may rely on others respecting the rules unless the situation suggested otherwise.

For the defence, knowledge of the Constitutional Court’s current case law is therefore essential, as institutional inertia among some law enforcement authorities still persists. An attorney must be able to refer to these rulings and apply them to the specific facts of the traffic accident in question. In cases where the principle of limited trust affects a driver’s criminal liability or the assessment of fault, it is advisable to consult the approach with the team at our law firm in Prague. In follow-on proceedings, the civil-law dimension is also often addressed (damages, insurers’ recourse claims, or the liability of multiple persons), where experience in commercial and litigation disputes can help.

How the principle of limited trust works in practice

For the principle of limited trust to be successfully invoked as a defence, three key aspects must be taken into account. The first is the objective foreseeability of a breach of the rules by another road user.

The court examines whether the specific circumstances gave the driver a reasonable signal that the rules would be breached. If a driver is turning and has checked the situation, they are not required to keep constantly watching the rear-view mirror in case someone decides to breach a prohibition at the last second.

The second aspect is the driver’s subjective possibility and ability to react to the situation. Reaction time, visibility, and the vehicle’s technical capabilities at that moment play a role here. The third point is the reasonableness of the caution required.

The Constitutional Court confirmed that requirements imposed on drivers must not go beyond what an average attentive driver is capable of handling. A requirement to permanently monitor all directions at the same time is physiologically impossible and legally unsustainable.

An example from practice may be a driver reversing out of a parking space when a child runs under the wheels from a so-called blind spot. If the driver exercised reasonable caution and the child could not have been seen in time, the driver’s fault cannot be inferred. Here, the principle of limited trust applies in relation to parental supervision.

Negligence — criminal-law aspect

In criminal law, traffic accidents are most often assessed as negligence offences. This may include, for example, negligent grievous bodily harm under the Criminal Code.

Negligence is divided into:

Conscious negligence: The offender knew they could cause the consequence, but without reasonable grounds relied on the fact that they would not cause it.
Unconscious negligence: The offender did not know they could cause the consequence, although they should and could have known.

It is precisely in cases of unconscious negligence that the application of the principle of limited trust is key. For the statutory elements of the offence to be met, it must be proven that the driver had both the duty and the ability to foresee the occurrence of the consequence. If the situation was objectively unforeseeable, there can be no culpability.

Documentation and its role in court argumentation

Success in a court dispute over fault for a traffic accident often depends on the quality of the evidence submitted. The foundation is the accident report and the sketch of the accident scene recorded by the Police of the Czech Republic.

Other key elements include:

Photographic documentation: Your own photographs from the scene immediately after the accident.
Video recordings: From dashcams or security cameras in the vicinity.
Expert opinions: A technical assessment of the course of the accident and the possibilities of avoiding the collision.

A high-quality legal representative can work effectively with expert opinions and ask the expert the right questions. The Constitutional Court has repeatedly emphasised that conclusions on guilt cannot be based on theoretical calculations that do not reflect the reality of the specific moment.

Common mistakes in argumentation

In defence, mistakes often occur that may lead to failure. The first is a mechanical application of the principle in the style of “I had the right of way, therefore I am in the right”.

The principle of limited trust does not apply if the other participant’s breach of the rules was obvious in advance and the driver did not react to it. If the collision could have been avoided simply by braking, the court will usually not accept an argument based on right of way.

Another mistake is passivity in taking evidence and relying solely on the police’s work. In civil proceedings for damages, the burden of proof often lies with the person who claims they did not cause the damage. A third common mistake is underestimating contributory fault.

A common mistake is trying to prove absolute innocence, whereas strategically it may be more advantageous to prove significant contributory fault on the other side. This can lead to a substantial reduction of the penalty or the obligation to compensate damages.

The last point is ignoring local specifics. Argumentation must always be based on the specific place and time, because what is reasonable on a motorway does not apply in a residential zone.

Possible issues	How ARROWS helps (office@arws.cz)
Incorrect legal assessment of fault — The authority applies outdated case law and imposes unreasonable requirements on the driver.	Argumentation based on the current case law of the Constitutional Court.
Poor-quality expert opinion — The opinion is based on incorrect input data or does not take into account the specific conditions.	Securing a counter-expert opinion, professional examination of the expert in court.
Insufficient documentation — Key evidence about the situation at the scene is missing.	Active search for evidence (cameras, witnesses), reconstruction of events.
Insurer’s recourse claim — The insurer asserts recourse after paying damages under mandatory third-party liability insurance.	Legal analysis of whether the recourse claim is justified.
Parallel proceedings — The accident is dealt with both as an administrative offence and as a claim for damages in civil proceedings.	Comprehensive representation in all proceedings.

Specific legal standards following the Constitutional Court’s decision

In its judgment file no. IV. ÚS 3159/15, the Constitutional Court explicitly stated that a driver cannot be required to foresee breaches of traffic regulations by other participants unless the specific situation indicates otherwise.

The Court further noted that the principle of limited trust does not apply unconditionally; however, any departure from it must be justified by the specific circumstances of the case. Those circumstances must have been apparent to the driver at the relevant moment.

In practice, this means that the burden of proof as to whether the driver did and could have foreseen the danger lies with the authorities involved in criminal proceedings. They cannot be satisfied with the statement that an accident occurred and therefore the driver must have been inattentive. They must prove what, specifically, constituted the driver’s ability to prevent the accident.

Conclusion

In conclusion, the principle of limited trust is an absolutely essential tool for the fair assessment of fault in traffic accidents. The Constitutional Court of the Czech Republic has clearly confirmed that drivers cannot be required to have absolute, physiologically unrealistic foresight of others’ mistakes. If you behave on the road in accordance with the rules and have no objective reason to expect others to breach them, you should not bear blame for their unforeseeable lapses.

Practice shows, however, that the police and lower courts sometimes still apply outdated and overly strict case law. For a successful defence against unjust criminal prosecution, loss of a driving licence, or multi-million recourse claims by insurers, timely and active defence is therefore crucial.

If you are dealing with fault for a traffic accident, the specialists at ARROWS advokátní kancelář (office@arws.cz) are ready to vigorously defend your rights.

FAQ: Most common questions on traffic accidents and evidence

1. If I have a dashcam in my vehicle, can I use it as evidence?

Yes, dashcam recordings are commonly accepted in the Czech Republic as evidence in both misdemeanour and criminal proceedings, despite personal data protection rules (GDPR), because the legitimate interest in proving innocence or clarifying how an accident occurred prevails. It is important to submit the original, unedited recording.

2. What should I do immediately after a traffic accident?

Secure the accident scene and provide first aid. If anyone has been injured, or if the damage to any of the vehicles (including transported items) apparently exceeds CZK 200,000 (as set out in Act No. 361/2000 Coll., on Road Traffic, as applicable in 2026), or if traffic flow cannot be restored, call the Police of the Czech Republic. Always take your own photos and obtain contact details for witnesses.

3. How long does a court dispute take?

Misdemeanour proceedings usually take months. Criminal proceedings in traffic-accident cases can take from six months to several years, depending on the need for expert opinions. Civil disputes over damages may take 2–3 years, especially if the parties appeal.

4. What is an insurer’s recourse claim?

If an insurer pays for damage under your compulsory motor third-party liability insurance, it is entitled to seek reimbursement of that amount from you (the insurer’s statutory right of recourse) only in strictly defined cases set out by law. These are mainly situations where the driver caused harm intentionally, drove under the influence of alcohol or other addictive substances, drove without a valid driving licence, or unjustifiably left the scene of the accident and thereby made the investigation more difficult.

5. What sanctions may apply?

For a misdemeanour, you may face a fine (issued on the spot / by an on-the-spot order, or in administrative proceedings), penalty points and, potentially, a driving ban. For a criminal offence (e.g., grievous bodily harm caused by negligence), you may face imprisonment (often suspended), a driving ban for several years, and an obligation to compensate for damage not covered by insurance (e.g., non-pecuniary damage exceeding policy limits, deductibles).

Notice: The information contained in this article is of a general informational nature only and is intended to provide basic guidance based on the legal status as of 2026. Although we take the utmost care to ensure accuracy, legal regulations and their interpretation evolve over time. We are ARROWS, a Prague-based law firm registered with the Czech Bar Association (our supervisory authority), and for maximum client protection we maintain professional liability insurance with a limit of CZK 400,000,000. To verify the current wording of regulations and their application to your specific situation, it is necessary to contact ARROWS directly (office@arws.cz). We accept no liability for any damages arising from the independent use of the information in this article without prior individual legal consultation.

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