Should you expect three dangerous bends beyond this sign, all of which may be to the left?

In the video you are driving along a forest road in winter; a bus passes you from the opposite direction, and on the right there is sign A-4 "dangerous bends - first to the left" with plate T-4 with the number 3. Beyond this sign you should expect three dangerous bends, all of which may be to the left. The answer is: yes.

The Regulation on road signs and signals states that sign A-4 "dangerous bends - first to the left" warns of dangerous bends, the first of which is in the direction shown on the sign, and plate T-4 placed under the sign shows the number of bends. So the sign only tells you the direction of the first bend and how many bends there are; it says nothing about the direction of the next ones. Usually the bends alternate, but the road may also wind in two or three curves in the same direction - that is why "all of them may be to the left" is true, and a driver should not assume that the second one will definitely be to the right. Beyond the sign you exercise particular caution: you slow down before the first curve, you do not brake sharply in the bends and you do not overtake, because the Road Traffic Act prohibits overtaking a power-driven vehicle on a bend marked with warning signs.

Legal basis: § 4 para. 2 and 3 of the Regulation on road signs and signals; Art. 24 para. 7 point 2 of the Road Traffic Act (Prawo o ruchu drogowym)