Princip of Limited Trust in Traffic Law

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.