The main railway bridge over the Sava in Zagreb. The other is situated a few kilometres to the east, at Jakusevec, by the shunting station.
The two rail tracks observed at the picture are independent and both bi-directional, for some dozen meters afterwards they separate, one for Rijeka, and the other for Sisak and Bosnia. In 1980-s they had also different electrification; the left one was electrified at 3 kV = all the way long to Rijeka, while the right one has been originally electrified at 25 kV AC. Afterwards, the re-electrification of Zagreb - Moravice line took place, and the continuation to Rijeka is currently in progress.

Photo (February 2000): Toma Bacic Scan: Tin Sipos