Does the visible plate under the warning sign indicate the layout of the tracks and roads at the tram crossing?

In the video you are driving on a dual carriageway in town along tram tracks; on the right there is sign A-21 "tram", and below it a yellow plate with a drawing of a road and the tracks crossing it. The visible plate under the sign shows the layout of the tracks and the road at the tram crossing. The answer is: yes.

The Regulation on road signs and signals states that sign A-21 "tram" warns of a crossing over tram tracks, and plate T-7 placed under the sign shows the layout of the tracks and the road at this crossing. The same plate T-7 is used under signs A-9 and A-10 before level crossings. The drawing on the plate shows at what angle and from which side the tracks cross the roadway - here the tracks run diagonally, which means that a tram will come from the side, and the crossing will be longer than when the tracks cross at a right angle. Before a tram crossing, you exercise particular caution, remember that at an uncontrolled junction of equal roads a tram has right of way regardless of its direction, and do not enter the tracks if there is no space beyond them to leave them straight away.

Legal basis: § 10 para. 3 of the Regulation on road signs and signals; Art. 25 para. 2 of the Road Traffic Act (Prawo o ruchu drogowym)