Are you permitted to overtake at the location indicated by the visible sign?

In the photo, you are driving on a dual carriageway under a flyover; on the right there is a yellow triangular sign with a thick bar and an arrow joining it from the right - A-6d "one-way road entering from the right" - with plate T-1 "190 m". At the place this sign refers to, you are not allowed to overtake. The answer is: no.

The Regulation on road signs and signals states that signs A-6d and A-6e warn of a junction with a one-way minor road that enters on the side shown on the sign, and plate T-1 shows the distance to it - here 190 m. The Road Traffic Act prohibits overtaking a power-driven vehicle at a junction, except at a roundabout and at a junction with controlled traffic. The entry of a one-way road from the right is a junction within the meaning of the Act - a connection of roads at the same level; there is no roundabout or traffic lights here, so the exceptions do not apply and overtaking is prohibited. Driving on a one-way roadway changes nothing - the exception for it concerns hills and bends, not junctions. Vehicles from the right enter your roadway, and the vehicle being overtaken may suddenly change lanes - so you do not start a manoeuvre that you will not be able to finish before the junction.

Legal basis: § 5 para. 4 and § 3 para. 1 and 4 of the Regulation on road signs and signals; Art. 24 para. 7 point 3 and para. 8 and Art. 2 point 10 of the Road Traffic Act (Prawo o ruchu drogowym)