25.6. When a convoy stops on the road, all vehicles in the convoy must switch on:
UAПід час зупинки колони на дорозі на всіх транспортних засобах колони вмикаються:
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This exam question from the Traffic Rules of Ukraine concerns road safety and the correct use of light signals in non-standard situations on the road. When several vehicles stop simultaneously on the carriageway or roadside, the risk of rear-end collisions and misunderstandings for other drivers increases, especially at night, during rain, or in fog. That is why the traffic rules specifically regulate how the stop of an organized group of vehicles should be marked.
The theoretical exam often includes the topics "Driving in a convoy" and "Use of external lighting devices and warning signals." This question tests knowledge of the requirements of Section 25 of the Traffic Rules (point 25.5) in conjunction with Section 9 (point 9.9, subpoint "d"): when a convoy stops on the road, each vehicle in the convoy must give the most visible warning signal to other road users, and for this purpose, the use of hazard warning lights on all vehicles in the convoy is provided.
If we analyze the options, fog lights and dipped headlights are not special signals that are specifically required in the case of a convoy stop: dipped headlights are a characteristic feature of a moving convoy (according to the definition of "convoy of vehicles"), but when stopped, an additional warning is needed. Orange flashing beacons are used only on vehicles that have the right and grounds to use them, and this is not a universal requirement for all convoy participants. Instead, hazard warning lights are directly established by the traffic rules for the case of a convoy stop, so it is this signal that provides an unambiguous and clear warning: not just one car is stopped ahead, but an organized group of vehicles.
Clause 25.5
In case the convoy stops on the road, the hazard warning lights must be switched on in all vehicles of the convoy.
Clause 9.9 (subclause "d")
The hazard warning lights must be switched on: ... d) in case of a convoy of vehicles stopping on the road.
Clause 1.10 (term "Convoy of vehicles")
Convoy of vehicles — an organized group of three or more vehicles moving together in the same direction, one directly behind another, with dipped headlights constantly switched on.
Clause 1.10 (term "Stop")
Stop — cessation of movement of a vehicle for up to 5 minutes or more, if necessary for boarding (alighting) passengers or loading (unloading) cargo, fulfilling the requirements of these Rules (giving way, complying with the instructions of a traffic controller, traffic light signals, etc.).
Clause 1.10 (term "Hazard warning lights")
Hazard warning lights — a light signal given by the simultaneous flashing of all turn indicators.
Thus, the correct answer is "Hazard warning lights," given that by definition and direct requirement of the Traffic Rules (cl. 25.5 and cl. 9.9 "d"), when a convoy stops on the road, they must be switched on in all vehicles of the convoy.
A convoy of vehicles in the Traffic Rules is understood as an organized group of at least three cars moving one after another in the same direction. While moving, such a convoy has its own features, in particular, the low beam headlights are constantly on so that other road users can clearly see that this is indeed a convoy and not just random individual cars.
When a convoy is forced to stop on the road (for example, due to the requirements of the Traffic Rules, boarding/disembarking, following the signals of a traffic controller, or other necessity), another task arises: to warn other drivers as noticeably as possible that several vehicles are standing on the carriageway or shoulder at once, and the situation may be unusual.
That is why clause 25.5 of the Traffic Rules establishes a clear requirement: in case of a convoy stopping on the road, the hazard warning lights must be switched on in every vehicle of the convoy. This does not mean one signal "for the whole convoy," but the activation of the hazard lights on each car so that the entire chain of stopped vehicles is clearly visible from afar, especially at night, in rain or fog, and to reduce the risk of a rear-end collision.
For example, if three or more cars were moving in a convoy and were forced to stop on the shoulder or partially on the carriageway, the hazard warning lights switched on in all these vehicles immediately let other drivers know: this is not a single vehicle stopped ahead, but a group of vehicles, so it is necessary to reduce speed in advance and be ready to maneuver around them.
Therefore, the correct answer is "Hazard warning lights," since when a convoy stops, the Traffic Rules require the hazard lights to be turned on in all vehicles of the convoy to clearly warn other road users.