31.17. In which case is the operation of the vehicle prohibited for you?
UAУ якому випадку вам забороняється експлуатація автомобіля?
Question without image
This exam question from the Traffic Rules of Ukraine concerns road safety in relation to the technical condition of the vehicle. In the theoretical test, it is often checked whether the driver understands which malfunctions are critical specifically from the perspective of preventing danger to other road users, and not just those that cause discomfort or complicate everyday operation.
The task tests knowledge of Section 31 of the Traffic Rules, which defines the list of technical malfunctions that prohibit the operation of a vehicle. The key provision here is clause 31.4.7 (b), which directly states that operation is prohibited if the horn does not work. Additionally, this logic is supported by the driver's obligation to check the vehicle's serviceability before departure according to clause 2.3 (a), and if a malfunction from the list in 31.4 occurs on the road — to act according to clause 31.5 (take measures to eliminate it and, if necessary, proceed by the shortest route to the place of repair/parking with precautionary measures).
The analysis of the answer options in this context is simple: a non-functioning fuel gauge, incorrect ignition timing adjustment, or a difficult engine start are undesirable malfunctions, but they are not listed in clause 31.4.7 (b) as grounds for prohibiting operation. In contrast, a faulty horn directly affects the driver's ability to attract attention in a critical situation (for example, in the event of a collision risk, dangerous lane change, or the appearance of a pedestrian), so the traffic rules establish a clear prohibition on operation until the malfunction is eliminated.
Clause 31.4
"Operation of vehicles is prohibited according to the legislation in the presence of the following technical malfunctions and non-compliance with the following requirements:"
Clause 31.4.7 (other structural elements), subclause b)
"31.4.7. Other structural elements: … b) the horn does not work."
Clause 2.3 (driver's duties), subclause a)
"To ensure road safety, the driver is obliged to: a) before driving, check and ensure the technical serviceability and completeness of the vehicle, the correct placement and securing of the load."
Clause 31.5
"In case of malfunctions specified in clause 31.4 of these Rules occurring on the road, the driver must take measures to eliminate them, and if this is not possible — proceed by the shortest route to a parking or repair location, observing safety precautions."
That is, the correct answer is "The horn does not work," given that according to the definition in the Traffic Rules, operation of the vehicle is prohibited in the presence of malfunctions explicitly listed in clause 31.4, and clause 31.4.7 b) directly establishes a ban on operation if the horn does not work.
Before setting off, the driver is required to ensure that the vehicle is technically sound and its structural elements are functioning properly. This is important not only for comfort, but primarily for road safety, as some malfunctions directly affect the ability to warn other road users about danger.
Section 31 of the Traffic Rules defines a list of technical malfunctions that prohibit the operation of a vehicle if present. In particular, item 31.4.7 (b) includes a non-functioning horn among such malfunctions. That is, if the horn does not produce sound, you are not allowed to drive this vehicle on the road.
The logic of this requirement is simple: the horn is a means of attracting attention in a dangerous situation. For example, a pedestrian may start to step onto the roadway, another driver may not notice you while changing lanes, or someone may be reversing without making sure the maneuver is safe. In such cases, a short signal often helps prevent an accident, and without a working horn, the driver loses one of the warning methods provided by the Rules.
At the same time, other possible technical issues such as an inaccurate fuel gauge, ignition timing issues, or difficulty starting the engine may be inconvenient and require repair, but in this task, the question of prohibition of operation is specifically tied to the provision of item 31.4.7 (b), which directly mentions the horn.
Therefore, the correct answer is "The horn does not work," since according to item 31.4.7 (b) of the Traffic Rules of Ukraine, operation of a vehicle with a faulty (non-functioning) horn is prohibited.