35.112. The braking distance changes depending on:
UAГальмівний шлях змінюється в залежності від:
This exam question from the Traffic Rules of Ukraine concerns road safety and the driver's ability to predict whether there is enough distance to stop under real conditions. Understanding what affects braking directly influences the choice of safe speed, maintaining distance, and preventing accidents, especially on wet roads, snow, or ice.
The question tests knowledge of terms and requirements from the traffic rules sections on speed and general concepts: in point 1.10, it is defined that the braking distance is measured from the moment braking begins until a complete stop, while the stopping distance is greater because it also includes the driver's reaction time. Section 12 of the Traffic Rules emphasizes that the driver must choose a speed that allows stopping within the visible distance, taking into account the road situation and the condition of the vehicle.
The analysis of options in the theoretical exam comes down to a simple conclusion: both speed and weather (road) conditions actually change the distance needed for a complete stop. As speed increases, the braking distance increases disproportionately, and weather and surface conditions affect tire grip: wet asphalt, snow, or ice reduce friction and lengthen braking. Since both of these factors influence simultaneously, the correct choice in this task summarizes them: it is necessary to consider all the mentioned conditions, as required by the Traffic Rules of Ukraine when choosing a safe speed and distance.
Clause 1.10 (term "Braking distance")
Braking distance — the distance a vehicle travels from the moment braking begins until it comes to a complete stop.
Clause 1.10 (term "Stopping distance")
Stopping distance — the distance a vehicle travels from the moment the driver detects a danger (obstacle) until the vehicle comes to a complete stop.
Clause 1.10 (term "Safe speed")
Safe speed — the speed at which the driver is able to safely control the vehicle and stop it within the visible road area, taking into account the traffic situation, the condition of the vehicle, and the cargo being transported.
Clause 12.1 — 12 "Speed of movement"
When choosing a safe speed within the established limits, the driver must take into account the traffic situation, 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.
Explanation: the clause directly requires taking into account speed, road conditions, and the technical condition of the vehicle — these are exactly the factors that affect the braking distance.
Clause 12.2 — 12 "Speed of movement"
At night and in conditions of insufficient visibility, the speed must be such that the driver can stop the vehicle within the visible road area.
Explanation: the ability to stop "within the visible area" directly depends on the braking (and stopping) distance, which changes with speed and the coefficient of adhesion (weather/road conditions).
Clause 13.1 — 13 "Distance, interval, oncoming passing"
Depending on the speed, traffic situation, characteristics of the cargo being transported, and the condition of the vehicle, the driver must maintain a safe distance and safe interval.
Explanation: the "safe distance" is chosen taking into account that the braking distance changes depending on speed, road/adhesion conditions, and the condition of the vehicle.
Clause 31.1 — 31 "Technical condition of vehicles and their equipment"
The technical condition of vehicles and their equipment must comply with the requirements of standards related to road safety, technical operation rules, manufacturers' instructions, and other regulatory and technical documentation.
Explanation: the technical condition (in particular, the braking system and tires) directly affects braking efficiency and, accordingly, the braking distance.
That is, the correct answer is "All answers are correct.", given that according to the definitions of the Traffic Rules and the requirements of the clauses on choosing a safe speed and distance, the driver must take into account speed, road/weather conditions (adhesion), and the condition of the vehicle, and these are exactly the factors that affect the braking distance.
The braking distance is the distance a vehicle travels from the moment the driver presses the brake pedal until it comes to a complete stop. According to the Traffic Rules, the driver is required to choose a safe speed taking into account the road situation and surface condition, in order to be able to stop the vehicle within visible range and avoid an accident. This directly indicates: the braking distance is not constant, it changes depending on the conditions and the state of the vehicle.
The first key factor is speed. The higher the speed, the more energy needs to be dissipated by the brakes and the longer it will take for the vehicle to stop. In practice, even a small increase in speed noticeably increases the braking distance, because the increase is disproportionate.
The second important factor is the tire grip with the road, that is, how well the tires "hold" onto the surface. On dry asphalt, grip is better, but on a wet road, snow, or ice, it is much worse, so the wheels slip more easily and the vehicle takes longer to stop. That is why the Traffic Rules require drivers to consider the condition of the roadway and weather conditions when choosing speed and following distance.
The technical condition of the vehicle also has an impact: the effectiveness of the braking system, the condition of the tires and tread, and tire pressure. Worn tires or faulty/ineffective brakes increase the stopping distance because they reduce the ability to apply the necessary braking force without losing grip. It's also important to understand the role of systems like ABS: it helps prevent wheel lockup and skidding, which often improves controllability and can shorten the braking distance in typical road conditions, whereas braking with locked wheels usually makes it longer.
Traffic conditions also affect the result: for example, road gradient. On a downhill slope, gravity "pushes" the vehicle, so stopping may require a greater distance than on a flat section. Temperature and other weather factors also change the properties of the surface and rubber, and therefore the braking distance as well.
Therefore, the correct answer is "All answers are correct," since the braking distance depends on speed, grip with the road (surface condition and weather), the technical condition of the car and tires, as well as traffic conditions, so each of the listed factors can change the distance required for a complete stop.