58.2. In which case is further movement of a car with a trailer prohibited, even to the place of repair or parking?
UAУ якому випадку забороняється подальший рух на автомобілі з причепом навіть до місця ремонту або стоянки?
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This exam question from the Traffic Rules of Ukraine tests the understanding of critical technical safety conditions when operating a road train (a vehicle with a trailer). Such knowledge is necessary not only for the theoretical exam but also for real-life situations on the road, when a driver must quickly assess whether it is possible to continue driving or whether it is necessary to stop immediately due to danger to other road users.
According to the traffic rules, a vehicle with a trailer forms a road train, and its safe operation directly depends on the serviceability of the towing-coupling unit. The section of the Traffic Rules on the technical condition and operation of vehicles (in particular, clause 31.6) sets out a list of malfunctions for which further movement is strictly prohibited, even "to the place of repair or parking." These include damage or malfunction of the coupling device, since the risk of the trailer becoming detached while driving creates an uncontrollable emergency situation.
The analysis of the options in this ticket is straightforward: the absence of a road train identification sign is a violation of marking requirements, but it is not a malfunction that automatically prohibits further movement specifically under the criteria of clause 31.6. The absence of rear-view mirrors is also a serious non-compliance with safety requirements and may be grounds for prohibiting operation under other regulations, but in the context of the "immediate prohibition of movement" list, the key feature is precisely the malfunction of the road train's towing-coupling device, as it directly threatens the loss of connection between the tractor and the trailer.
Clause 31.6
Further movement of vehicles is prohibited if: a) the service braking system or steering does not allow the driver to stop the vehicle or perform a maneuver while driving at minimum speed; b) at night or in conditions of insufficient visibility, the headlamp bulbs or rear position lamps are not lit; c) during rain or snowfall, the windshield wiper on the driver's side does not work; d) the tractor-trailer coupling device is damaged.
This clause directly establishes cases when movement is completely prohibited (including "to the place of repair or parking"), and specifically mentions damage/malfunction of the tractor-trailer coupling device.
Clause 1.10 (term "Trailer")
Trailer — a vehicle designed to move only in conjunction with another vehicle. This category of vehicles also includes semi-trailers and drawbar trailers.
This term is needed to understand that the question concerns the movement of a vehicle specifically with a trailer attached.
Clause 1.10 (term "Road Train")
Road train — a motor vehicle connected to one or more trailers.
This definition clarifies that a "vehicle with a trailer" in the Traffic Rules is considered a "road train," for which the serviceability of the coupling device is critical.
Thus, the correct answer is "Faulty coupling device," given that according to the definition in the Traffic Rules, further movement is prohibited if the tractor-trailer coupling device is damaged (clause 31.6, subclause d).
When a car is moving with a trailer, it forms a road train. By its nature, a trailer is not an independent vehicle in motion: it can only move safely when it is securely connected to the towing vehicle via the towing-coupling device. This component holds the trailer, transmits the tractive force, and ensures controllability as part of the road train.
The Traffic Rules explicitly define a list of malfunctions for which further movement is prohibited. Such cases include, in particular, damage or malfunction of the road train's towing-coupling device. This is not a situation where it is allowed to "carefully drive" to a parking lot or repair shop: movement must be stopped, because the very possibility of losing the connection while driving creates a critical danger.
In practice, this means that if the coupling device has play, cracks, deformation, the coupling lock does not engage, or there are other signs of an unreliable connection, the trailer can detach while in motion. In such a case, it may enter the oncoming lane, sidewalk, or collide with other vehicles, and the driver of the towing vehicle will not be able to control the trailer's trajectory. That is why the Traffic Rules classify this malfunction as one that excludes any further movement.
Therefore, the correct answer is "Faulty coupling device," since according to the Traffic Rules, damage to the road train's towing-coupling device is classified as a malfunction for which further movement is prohibited, even to the place of repair or parking.