Question from Sasha Ferz:
We are talking about an intersection in Lisovy Masyv where Bratislavska and Kurchatova streets cross.

In the photo taken on Bratislavska, a "no entry" sign is visible. I am interested in how correctly it is placed and whether it is of any real use? After all, according to traffic rules, it is impossible to approach it (as shown in the second frame), and from the intersection it is hardly visible. At the same time, I see cars from a driving school at this intersection calmly turning left, ignoring the "one-way road" sign, then driving up to the "no entry" sign and turning back. Maybe I am misinterpreting the rules, or are these drivers acting illegally?

Moreover, one-way traffic here creates a lot of inconvenience. According to the rules, you cannot enter the courtyards from Kurchatova — you have to make a detour through half of the district or deliberately violate the rules. If two-way traffic were organized on this section of the street, as proposed in my diagram, local drivers would find it much easier.

Comment from Karat driving school instructors:
The sign 3.21 ("no entry") is placed in situations where it is necessary to block access for vehicles to a lane where traffic goes in one direction, or to a dedicated lane for route vehicles. The instruction of sign 5.7.1 ("one-way road") is mandatory, so it is illegal to drive up to the "no entry" sign. Therefore, the training vehicles you mention systematically violate the rules. Note that sign 5.7.1 does not prohibit a U-turn at this intersection.

Conclusion:
According to the rules, it is impossible to drive up to the "no entry" sign. Probably, it would be more correct to install the sign directly at the intersection.

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All answers will appear in the "Traffic Rules Lessons" section.