53.45. The following are considered road trains (vehicle combinations):
UAДо автопоїздів (транспортних составів) належать:
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This is an exam question from the Traffic Rules of Ukraine (PDR) concerning basic definitions, without which it is impossible to correctly understand the requirements of traffic regulations and safely interact with other participants. Recognizing vehicle combinations is important for assessing their dimensions, maneuverability, and braking distance, since such vehicles take turns differently, require greater spacing, and pose increased risks during overtaking and passing.
The question tests knowledge of the “General Provisions” section and PDR terminology, specifically the definition from clause 1.10 regarding a road train (vehicle combination). According to the traffic rules, a road train is considered to be a motor vehicle connected to one or more trailers by a coupling device. For the theoretical exam, it is important to remember: the key feature here is not the type of coupling between two vehicles, but the presence of trailer(s) moving together with the tractor as a single system.
If we analyze the options, the wording about two or more motor vehicles connected by a flexible coupling does not fit, as this rather describes towing, not the definition of a road train in the PDR of Ukraine. The option about two motor vehicles on a rigid coupling also refers to coupling during towing and does not include the mandatory feature of a trailer. Instead, the correct interpretation directly corresponds to clause 1.10: a tractor plus one or more trailers via a coupling device; therefore, a combined answer that includes “two motor vehicles on a rigid coupling” is also incorrect.
The practical benefit of this knowledge for the driver is obvious: a road train takes longer to brake, maneuvers worse, and the trailer shifts toward the inner radius during a turn, which can cause it to hit a curb, sidewalk, or obstacle. Understanding the term from the PDR helps to correctly assess the situation on the road, maintain a safe distance, and avoid performing dangerous maneuvers near vehicle combinations both during the exam and in real traffic.
Clause 1.10 (term "Road Train")
Road train (vehicle combination) — a motor vehicle coupled with one or more trailers by means of a coupling device.
This clause directly defines which vehicles are considered road trains (vehicle combinations): there must necessarily be a motor vehicle and one or more trailers connected by a coupling device.
That is, the correct answer is "A motor vehicle coupled with one or more trailers by means of a coupling device," since according to the definition in the Traffic Rules, a road train (vehicle combination) is formed in exactly this way.
This question tests knowledge of the definition of the term "road train (vehicle combination)" from point 1.10 of the Traffic Rules of Ukraine. To answer correctly, it is important to understand that it is not about a specific type of vehicle, but about a combination of vehicles that move together as a single unit.
A road train is formed when there is a motor vehicle (for example, a passenger car or a truck) and a trailer or even several trailers are attached to it. The defining feature is the presence of a coupling device through which the trailer is connected to the towing vehicle.
For example: a passenger car towing a cargo trailer or a caravan trailer; a truck connected to a trailer; a tractor unit operating with several trailers. In each of these cases, we see one mechanical unit moving together with the trailer(s) due to the coupling, that is, this is a road train in the sense of the Traffic Rules.
Therefore, the correct answer is "A motor vehicle coupled with one or more trailers by means of a coupling device," since this is exactly how the Traffic Rules (point 1.10) define a road train as a motor vehicle connected to trailer(s) via a coupling device.