Has the driver of the combination of vehicles, who stopped in the middle of this roadway, behaved appropriately towards the driver of the emergency fire service vehicle?

Why?

The vehicle combination has stopped in the middle of the carriageway, occupying space needed by the fire engine. Simply stopping is not enough; the driver must clear the emergency vehicle's path. To form an emergency corridor, drivers in the leftmost lane move left, while those in all other lanes move right.

art. 9 ust. 1 i 2 Prawa o ruchu drogowym