35.11. In which of the following cases should the driver assess the situation behind?
UAУ якому з перелічених випадків водієві слід оцінювати обстановку позаду?
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This is an exam question from the Traffic Rules of Ukraine about road safety and driving culture: a driver must monitor the situation not only ahead, but also to the sides and behind. Any reduction in speed changes the conditions for those driving behind you, so attentiveness and risk anticipation help avoid common accidents, particularly rear-end collisions due to insufficient distance or unexpected braking.
The question tests the section of the Traffic Rules regarding the driver's duties and attentiveness (paragraph 2.3 "b"), as well as the requirements for safe speed reduction (paragraphs 12.3 and 13.4). In the theoretical exam, it is important to understand that assessing the situation behind through mirrors is necessary before any braking: there may be a car behind that is "tailgating" at a short distance, a motorcycle in the blind spot, or a vehicle changing lanes or starting to overtake. Monitoring behind allows you to choose the nature of braking (smooth or more intensive), to warn in advance with brake lights, and not to create danger for other road users.
Analysis of the options shows a typical mistake: limiting mirror checks only to "risky" situations. Restricting it to only sudden braking or only wet/slippery surfaces is incorrect, because even normal, moderate braking can be unexpected for the driver behind, and the road surface is not the only risk factor. The correct logic of the Traffic Rules: any braking requires assessing the situation behind, so that the action is safe and predictable for others.
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, ... and not be distracted from driving this vehicle on the road."
This obligation includes monitoring the situation around the vehicle, including with the help of rear-view mirrors, particularly before and during speed reduction (braking).
Clause 13.4
"The driver is prohibited from braking sharply unless it is necessary to prevent a traffic accident."
In order not to create danger for vehicles moving behind (risk of rear-end collision), the driver, before any braking (especially non-emergency), must assess the situation behind and choose the manner of braking taking this situation into account.
Clause 12.3
"In case of a danger to traffic or an obstacle that the driver can objectively detect, he must immediately take measures to reduce speed up to stopping the vehicle or safely bypassing the obstacle for other road users."
The phrase "safely for other road users" means that during braking, the driver must also take into account those moving behind, so that his actions do not lead to a dangerous situation.
That is, the correct answer is "In the case of any braking," given that according to the definition of the Traffic Rules, the driver is obliged to constantly monitor the road situation (including behind), as well as is not allowed to brake sharply without reason and must reduce speed in such a way that it is safe for other road users.
While driving, the driver constantly monitors the traffic situation not only ahead, but also to the sides and behind. This is necessary so that any of your actions do not come as a surprise to other road users and do not create danger.
Braking is one of the basic driving techniques: it is used to reduce speed, stop, drive downhill, or respond to an obstacle or danger. The Traffic Rules require that if a driver can objectively detect a danger or obstacle, they must immediately take measures to reduce speed up to stopping or safely bypassing it. That is, braking may be needed at any moment, including suddenly.
That is why before any braking it is important to assess the situation behind you using the mirrors. There may be a car behind with insufficient distance, a motorcycle in the "blind spot," or a vehicle that has already started overtaking or changing into your lane. If you reduce speed without monitoring the situation behind, the risk of a rear-end collision increases, even if your braking is caused by real conditions ahead.
For example, you see a traffic jam ahead or a pedestrian stepping onto the crosswalk, and you have a legal obligation to reduce speed. But if a car behind has come too close, you may need to brake more smoothly, signal your braking in advance, and at the same time be ready to maneuver within your lane to avoid provoking a rear-end collision. And when driving downhill, even moderate braking requires monitoring behind, because the difference in speeds and increased braking distance for other drivers can play a decisive role.
Therefore, the correct answer is "In the case of any braking," because when reducing speed, the traffic situation changes for those driving behind, and only checking through the mirrors allows you to brake safely and not create a risk of a rear-end collision.