Should you exercise extreme caution in this situation?

In the video you are driving on a dual carriageway in town along tram tracks; on the right there is sign A-21 "tram" with plate T-7, which shows that the tracks will cross the roadway diagonally. You must exercise particular caution. The answer is: yes.

The Regulation on road signs and signals states that warning signs warn of places on the road where there is or may be a danger, and oblige drivers to exercise particular caution; sign A-21 warns of a crossing over tram tracks. The Road Traffic Act defines particular caution as increasing your attention and adapting your behaviour to the conditions and changing situations on the road, to a degree that allows you to react quickly enough. At tram tracks this means: you slow down, look both ways along the tracks, watch the traffic lights if there are any, and do not enter the tracks when there is a queue of traffic beyond them. A tram weighs several dozen tonnes, runs on rails and cannot go around you, and its braking distance is many times longer than a car's; at an uncontrolled junction of equal roads it has right of way regardless of its direction. The diagonal tracks on the plate tell you that the crossing will be longer and that a tram will come at an angle, partly from behind you - hence the need to look over your shoulder.

Legal basis: § 3 para. 1 and § 10 para. 3 of the Regulation on road signs and signals; Art. 2 point 22 and Art. 25 para. 2 of the Road Traffic Act (Prawo o ruchu drogowym)