33.4.31. The depicted road sign indicates:
UAЗображений дорожній знак позначає:
This exam question from the Traffic Rules of Ukraine concerns winter driving safety and the mandatory requirements that a driver must follow on challenging road sections. During icy conditions or on snow-covered surfaces, the correct use of traction-enhancing devices helps maintain control, reduces the risk of wheel slip and skidding when starting, braking, and climbing hills. Such knowledge directly affects both the successful completion of the theoretical exam and real-world safety.
The question tests understanding of mandatory road signs in Section 33 "Road Signs," Group 4 "Mandatory Signs," specifically sign 4.21. Its meaning is not a recommendation or warning, but establishes a mandatory condition: driving in this area is allowed only if anti-skid chains are installed on at least two driving wheels (often used together with plate 7.12 "Ice"). That is why the correct answer is about driving with chains: it matches the wording of the traffic rules and applies to passenger cars, trucks, and buses, without narrowing it to a specific category.
The other options are incorrect because they distort the meaning of the sign: the statement about "only trucks" adds a restriction that does not exist in the traffic rules, and is therefore misleading. The option about tire service also does not correspond to the purpose of mandatory signs and is not related to service facilities, which are indicated by other informational signs. In practice, this rule means a simple thing: if you enter the area of sign 4.21 without chains, you cannot continue driving under the relevant conditions, as the requirement is mandatory.
Clause 33.4 — 33 "Road Signs", 4 "Mandatory Signs", sign 4.21 "Movement with the use of anti-skid chains"
"Movement of passenger cars, trucks, and buses with the use of anti-skid chains on at least two driving wheels of the vehicle."
This mandatory sign establishes a compulsory condition for movement on the road section: continuing to drive is allowed only if there are anti-skid chains on at least two driving wheels.
That is, the correct answer is "Movement with the use of anti-skid chains," given that according to the definition in the Traffic Rules, sign 4.21 directly requires passenger cars, trucks, and buses to move with anti-skid chains (on at least two driving wheels).
Road sign 4.21 belongs to mandatory signs, meaning it does not warn or recommend, but establishes a compulsory traffic condition on a certain section of the road. Drivers must comply with such signs from the moment they enter the zone of their effect.
The meaning of sign 4.21 is that the movement of vehicles on this section is carried out using anti-skid chains. The practical sense of this requirement is clear: in case of ice or on a snow-covered surface, chains increase the traction of the driving wheels with the road, reduce the likelihood of wheel slip and skidding, and also help maintain control during starting, braking, and driving uphill.
In the wording used for sign 4.21, it is important that chains must be installed on at least two driving wheels. In practice, this sign is often used together with plate 7.12 "Ice", to emphasize the reason for the restriction and the conditions under which it is especially relevant.
Therefore, the correct answer is "Movement with the use of anti-skid chains," since sign 4.21 establishes a mandatory traffic condition for the road section: driving is allowed only if anti-skid chains are used on the driving wheels.