47.4. In a traffic flow, it is safest to drive at a speed:
UAУ транспортному потоці найбезпечніше рухатися зі швидкістю:
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This exam question from the Traffic Rules of Ukraine concerns road safety in conditions of heavy traffic: how to choose a speed that maintains predictability, distance, and minimizes conflicts in the flow. In practice, it is the difference in speeds between vehicles that is often the cause of dangerous close encounters, 'chain' braking, and risky lane changes, so the topic is directly related to the basic safe driving skills assessed by the theoretical exam.
The question checks knowledge of the concepts and requirements of the section on speed and the choice of safe speed in the traffic rules, in particular the definition of 'safe speed' (clause 1.10) and the driver's obligation to take the road situation into account (clause 12.1), where the intensity and density of the flow are key factors. The most stable and least conflict-prone situation arises when the speed of the vehicle matches the general pace of traffic: this reduces the need for unnecessary maneuvers and makes it easier to maintain a safe distance and control.
The option with a lower speed may seem 'cautious', but in dense traffic it often turns the vehicle into an obstacle: others are forced to overtake, change lanes more often, or brake, which increases the risk of side collisions. Moving faster than the flow, on the contrary, provokes the driver to constantly reduce distance, look for gaps, and perform frequent maneuvers, which is especially dangerous before intersections and on sections where the intervals between cars are minimal. Therefore, focusing on the speed of the flow within the permitted limits and taking conditions into account is the safest and most logical choice for this exam question.
Clause 1.10 (term “Safe speed”)
Safe speed — the speed at which the driver is able to safely control the vehicle and manage its movement under specific road conditions.
Clause 12.1
When choosing a safe driving speed within the established limits, the driver must take into account the road situation, as well as the characteristics of the cargo being transported and the condition of the vehicle, in order to be able to constantly control its movement and drive it safely.
Brief application: “road situation” includes, in particular, the intensity and density of traffic flow; significant deviation of speed from the flow speed increases the risk of conflicts (overtaking/passing, lane changes) and, accordingly, reduces traffic safety.
That is, the correct answer is “Equal to the speed of the traffic flow,” given that according to the definition in the Traffic Rules, safe speed must ensure constant control of movement under specific road conditions, and when choosing it, the driver is obliged to take into account the road situation (in particular, the intensity of the traffic flow).
While driving in dense traffic, the most important task for the driver is to maintain control of the vehicle and not create dangerous situations for themselves or others. In the Traffic Rules, this is directly related to the concept of “safe speed” (clause 1.10): it must ensure the ability to safely operate the vehicle and control its movement specifically under these road conditions, taking into account, among other things, the intensity of traffic.
When all lanes are occupied and traffic is moving steadily, the most predictable situation arises when the speeds of the vehicles are approximately the same. If you drive noticeably slower than the flow, you actually become an obstacle: other drivers will be forced to change lanes more often, overtake, or sharply change speed. In dense traffic, this increases the risk of side collisions and “chain” braking.
If you move faster than the flow, you constantly have to “weave” between vehicles: more often reducing the distance, changing lanes, and looking for gaps. In real conditions of heavy traffic, such maneuvers cannot always be performed safely, especially when the distances between vehicles decrease (for example, before intersections), and any mistake or delayed reaction leads to dangerous proximity.
It is also important to remember the difference in speeds: when it is too small, overtaking or passing takes longer, and vehicles remain side by side in the “danger zone” for a longer time. Therefore, excessive deviation from the speed of the majority (either lower or higher) worsens safety, as it forces either you or others to maneuver more often.
Thus, the correct answer is “Equal to the speed of the traffic flow,” because moving at the speed of the majority makes the situation predictable, reduces the need for unnecessary maneuvers, and helps maintain a safe distance in heavy traffic conditions.