35.33. How does the driver's field of vision change as the speed increases?
UAЯк змінюється поле зору водія зі збільшенням швидкості руху?
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This exam question from the Traffic Rules of Ukraine concerns road safety and the psychophysiology of the driver: how the perception of the road environment changes as speed increases. In practice, this directly affects the risk of not noticing a pedestrian, sign, traffic light, or a car from the side, as well as the ability to make timely decisions. That is why the theoretical exam includes topics related not only to formal requirements, but also to the real capabilities of a person behind the wheel.
The question checks understanding of the sections of the traffic rules about driver attentiveness and the choice of safe speed, taking into account visibility and field of view (concepts from point 1.10, driver duties in point 2.3, as well as the requirements of section 12 regarding speed). As speed increases, the driver involuntarily focuses their gaze further ahead in order to have time to assess events, and peripheral zones are controlled worse. Because of this, the actually perceived area around the car decreases, that is, the field of vision narrows.
The option stating that the field of vision does not change contradicts how vision actually works: at higher speeds, the load increases, information "from the sides" is processed worse, and attention is concentrated on the central lane of movement. The statement about expansion is also incorrect: speed does not add to perception capabilities, on the contrary, it reduces them, especially for peripheral objects. The correct answer about narrowing is consistent with the requirements of the Traffic Rules of Ukraine to choose such a speed that you can constantly control movement, see the road situation, and have time to react; if you feel that you "see only directly in front of you," this is a signal to reduce speed.
Clause 1.10 (term "Visibility")
Visibility — the objective ability to see the road situation from the driver's seat.
Clause 1.10 (term "Limited visibility")
Limited visibility — visibility of the road in the direction of travel, which is limited by the terrain, geometric parameters of the road, roadside engineering structures, plantings, and other objects, as well as by vehicles.
Clause 1.10 (term "Insufficient visibility")
Insufficient visibility — visibility of the road in the direction of travel of less than 300 m in twilight, fog, rain, snowfall, etc.
Clause 2.3 (subclause "b")
To ensure road safety, the driver is obliged to: be attentive, monitor the road situation, respond appropriately to its changes, monitor the correct placement and securing of cargo, the technical condition of the vehicle, and not be distracted from driving this vehicle on the road.
Brief application: the question checks the understanding that as speed increases, it becomes more difficult for the driver to "monitor the road situation" across the entire width/periphery of vision, so the actually perceived area (field of vision) narrows.
Clause 12.1
When choosing a safe 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: narrowing of the field of vision at higher speeds directly affects the ability to "constantly control movement" and is a factor in choosing a safe speed.
Clause 12.2
At night and in conditions of insufficient visibility, the speed must be such that the driver can stop the vehicle within the visible distance of the road.
Brief application: the question is related to the fact that as speed increases, the driver is forced to shift attention further ahead, and peripheral perception worsens; therefore, the requirement to correlate speed with "road visibility" becomes critical.
Clause 12.3
If a danger to traffic or an obstacle that the driver can objectively detect arises, he must immediately take measures to reduce speed up to stopping the vehicle or safely bypassing the obstacle for other road users.
Brief application: excessive speed (which is accompanied by narrowing of the field of vision) reduces the chance to detect danger in time, so the Traffic Rules directly require immediate speed reduction when danger/obstacle appears.
Thus, the correct answer is "Narrows.", given that according to the definition of the Traffic Rules, the driver must choose a safe speed taking into account visibility and must be able to constantly control movement and respond in time, and as speed increases, the amount of perceived peripheral information (field of vision) objectively decreases.
The driver's field of vision is the area ahead that they can see without turning their eyes or head. In a calm state or at low speed, this viewing angle is quite wide, so the driver easily notices not only what is directly in front of the car, but also events on the sides: pedestrians near the crosswalk, a cyclist on the roadside, a car in the adjacent lane.
When speed increases, the traffic situation changes more quickly and there is less time to react. To keep up with assessing the situation, the driver involuntarily shifts their main attention far ahead—to where danger may arise and where decisions need to be made in advance. Because of this, peripheral objects are perceived worse: what happens on the left and right seems to "fall out" of control, and the view concentrates on a narrow section of road in the center.
In practice, this looks like the following: at high speed, the driver may notice a sign, traffic light, approaching vehicle from the side, or a pedestrian stepping onto the roadway later. That is why the Traffic Rules require choosing a safe speed that allows you to constantly monitor the traffic situation, timely detect dangers, and have time to make the right decisions. If you feel that you see "only the road in front of the hood" and control the side zones worse, this is a sign that the speed is too high for these conditions and it needs to be reduced.
Thus, the correct answer is "Narrows," because as speed increases, the driver is forced to focus their gaze further ahead, and the peripheral field of vision is less controlled.