35.18. A safe distance between passenger cars moving at a speed of 50 km/h on dry asphalt can be considered:
UAБезпечною дистанцією між легковими автомобілями, які рухаються зі швидкістю 50 км на годину на сухому асфальті, можна вважати:
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This is an exam question from the Traffic Rules of Ukraine about road safety and preventing collisions in traffic. A properly chosen following distance directly affects the ability to avoid a crash when the vehicle ahead suddenly brakes or stops. In the theoretical exam, such tasks check whether the driver understands that the following distance depends on speed, road surface condition, and visibility, and is not set “once and for all” by a single small number.
The question tests knowledge of the definition of “safe distance” (item 1.10), the driver’s obligation to maintain it depending on driving conditions (item 13.1), and the practical method for assessing the interval between cars. The traffic rules do not usually specify exact meters, except in cases where the distance is directly set by prohibition sign 3.20, so in training practice for dry asphalt the two-second rule is often used. At a speed of 50 km/h, this roughly corresponds to a distance of about 25 meters, i.e., the minimum margin that allows time to react and begin braking.
The explanation of the options is simple: 2 meters or “the length of a passenger car” do not provide a real margin either for the driver’s reaction or for the braking distance at 50 km/h, so they cannot be considered safe in normal traffic flow. Instead, the option with a time interval of at least 2 seconds is practical and universal: it is easier to count seconds than to estimate meters “by eye,” and at the given speed it gives approximately the same 25 meters. This knowledge helps to answer exam questions correctly and to drive more safely in the city and on the highway.
Clause 1.10 (term "Safe distance")
Safe distance — the distance between moving vehicles which, under the road conditions, speed, and surface condition, allows the driver of the vehicle behind to avoid a collision in the event of sudden braking or stopping of the vehicle in front.
Clause 13.1
The driver, depending on the speed, road conditions, characteristics of the cargo being transported, and the condition of the vehicle, must maintain a safe distance and a safe interval.
Clause 33.3 — 33 "Road signs", 3 "Prohibitory signs", sign 3.20 "Movement of vehicles without maintaining distance"
Movement of vehicles without maintaining the distance indicated on the sign is prohibited.
Clause 12.1
When choosing a safe speed within the established limits, the driver must take into account the road conditions, 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: the safe distance is directly related to speed; the higher the speed, the greater the distance must be to avoid a collision.
That is, the correct answer is "Not less than 25 meters or 2 seconds," given that according to the definition in the Traffic Rules, the safe distance must ensure avoidance of collision (clause 1.10) and the driver is required to maintain it depending on speed and traffic conditions (clause 13.1), and in practice, a time interval of at least 2 seconds is used to assess such a distance, which at 50 km/h on dry asphalt is approximately 25 m.
When you are moving in traffic, the Traffic Rules of Ukraine require you to maintain a safe distance from the vehicle in front, that is, a distance that will allow you to avoid a collision in case of its sudden braking or stopping. The Traffic Rules usually do not specify an exact number in meters, so the driver must assess the distance taking into account speed, road surface condition, and visibility. The exception is cases where the distance is directly set by a sign, but in this question, we are talking about normal driving conditions on dry asphalt.
To understand what distance will actually be safe, you need to consider simple logic: between the moment the car in front starts to brake sharply and the moment you start braking, there is always a time for perceiving the danger and reacting. Even with attentive driving, this is about a second or more. If the distance is too short, during this time your car will travel a significant distance and there may not be enough space left for effective braking without a collision.
That is why the two-second rule is used in training practice. It is convenient because it is easier for a driver to estimate time than to "eyeball" meters. You choose a stationary landmark on the roadside or above the road (a post, sign, or lighting pole). When the vehicle in front passes this landmark, you count two seconds to yourself. If you reach the landmark before two seconds have passed, the distance is insufficient; if after two seconds the landmark is still ahead of you, the distance is acceptable for dry asphalt at moderate speed.
Let's convert this to meters for the given speed. 50 km/h is approximately 14 m/s. In 2 seconds, the car will travel about 28 meters. In the TSC MIA test tasks, a simplified assessment rule is often used: the safe distance in meters is approximately equal to half the speed in km/h. For 50 km/h, this gives 25 meters, which is consistent with the two-second rule as the minimum acceptable distance on dry asphalt.
Therefore, the correct answer is "No less than 25 meters or 2 seconds," since the safe distance should provide a margin of time for reaction and braking, and for 50 km/h on dry asphalt, this corresponds to about 2 seconds of travel or about 25 meters.