Does the prohibition expressed by this vertical sign prohibit you from turning left at the nearest intersection?

In the video you are driving along a dual-carriageway street in a city behind a silver car and approaching a junction with traffic lights; on the left, on the grass strip, there is sign B-23 "no U-turn". This sign does not prohibit turning left at the nearest junction - it prohibits only U-turns. The answer is: no.

The Regulation on road signs and signals states that sign B-23 "no U-turn" prohibits drivers from making a U-turn up to and including the nearest junction; a ban on turning left is expressed by a different sign - B-21, which in turn also prohibits U-turns. So the relationship works only one way: where you must not turn left, you must not make a U-turn either, but where you must not make a U-turn, a left turn remains allowed. A no U-turn sign is placed where the manoeuvre would be dangerous or would block traffic - on wide main roads with traffic lights, where a car making a U-turn would stand in the middle of the junction for a long time. If you want to turn left, you get into the correct lane, signal and turn on green, giving way to vehicles coming from the opposite direction; you make a U-turn only at the next junction without a prohibition.

Legal basis: § 22 para. 1 and 5 of the Regulation on road signs and signals