56.9. Is the driver of a road train allowed to continue driving straight ahead if the total mass of the tractor and trailer is 15 tons?
UAЧи дозволено водієві автопоїзда продовжити рух у прямому напрямку, якщо сумарна маса тягача та причепа становить 15 т?
This exam question from the Traffic Rules of Ukraine tests the driver's ability to correctly interpret prohibitory road signs and their supplementary plates, which directly affects road safety and route planning. Such situations often occur at the approaches to bridges, populated areas, or sections with load restrictions, where it is important not only to see the sign but also to understand exactly when its effect begins.
In the theoretical driving exam, this topic belongs to section 33 “Road Signs”: prohibitory sign 3.15 restricts the movement of vehicles, including combinations (road trains), if their total actual weight exceeds the value indicated on the sign. At the same time, supplementary plate 7.1.1 “Distance to the object” clarifies that the restriction is introduced not at the location of the sign, but at the specified distance ahead. Therefore, even when the total weight of the tractor and trailer exceeds the indicated value, at the current intersection the prohibition does not yet apply, and the sign serves a warning function, giving a chance to change direction in advance.
The analysis of options in this exam question is straightforward: the statement about prohibition would only be correct if sign 3.15 were already in effect at this location (without the supplementary plate or after the specified distance has passed). Instead, the correct option is that driving straight is allowed, because the start of the restriction zone is postponed by the supplementary plate, and the sign’s requirement will take effect later. In practice, this means: it is currently allowed to drive straight, but the driver of the road train must prepare a detour in advance so as not to violate the sign’s requirements once its effect begins.
Clause 1.10 (term “Road train”)
Road train — a motor vehicle coupled with one or more trailers.
Clause 1.10 (term “Actual weight of the vehicle”)
Actual weight of the vehicle — the weight of the vehicle with cargo (if any), driver, and passengers.
Clause 33.3 — 33 “Road signs”, 3 “Prohibitory signs”, sign 3.15 “Movement of vehicles with a weight exceeding ... t is prohibited”
Sign 3.15 prohibits the movement of vehicles, including their combinations, whose total actual weight exceeds the value indicated on the sign.
Application to the question: the prohibition under sign 3.15 applies specifically to the “total actual weight” of the combination (tractor + trailer), but the start of the restriction may be specified by a supplementary plate.
Clause 33.7 — 33 “Road signs”, 7 “Supplementary plates to road signs”, plate 7.1.1 “Distance to the object”
Plate 7.1.1 indicates the distance from the sign to the beginning of a hazardous section, the place where the relevant restriction is introduced, or a certain object (place) located ahead in the direction of travel.
Application to the question: if plate 7.1.1 with a specified distance (for example, 1 km) is installed under sign 3.15, then the restriction (weight prohibition) takes effect not at the location of the sign, but after the indicated distance.
Thus, the correct answer is “Allowed.”, given that according to the definition in the Traffic Rules, prohibitory sign 3.15 with plate 7.1.1 only warns about the introduction of the restriction after the specified distance, and at this intersection the prohibition does not yet apply.
In this situation, it is necessary to correctly interpret the combination of the prohibitory sign 3.15 and the plate beneath it. Sign 3.15 itself prohibits the movement of vehicles (including road trains) if their total actual mass exceeds the value indicated on the sign. That is, for a road train, the total mass of the tractor and the trailer is taken into account.
However, under the sign, there is plate 7.1.1 "Distance to the object." It means that the requirement of the sign does not take effect immediately at the place where it is installed, but at the specified distance ahead in the direction of travel (in this case — in 1 km). Therefore, at the intersection shown in the question, this sign does not yet impose a prohibition, but only warns the driver in advance about the upcoming restriction.
Thus, even if the actual total mass of the road train is 15 tons and it exceeds the restriction indicated on the sign, there is no violation directly at this intersection, because the prohibition zone has not yet started. The driver has the right to continue straight ahead, but must take into account in advance that in 1 km he will no longer be able to continue if his mass exceeds the value on the sign.
Therefore, the correct answer is "Allowed," since the distance plate indicates that the prohibition of sign 3.15 will only take effect in 1 km, and at this intersection it does not yet apply.