I'm in some puzzlement, re a particular stretch of railway in Croatia. Namely, the line from Karlovac to Sisak via Glina. After the break-up of Yugoslavia, this line -- running through an area particularly heavily affected by the horrors attendant on that break-up -- was for many years, out of use. I find nowadays, tantalising hints that it might be functioning again, including for passenger traffic (can derive from Google, no certain indication "one way or the other"). Would be very grateful if anyone knowledgeable about this part of the world, could let me know for sure about this line's current status.
In short, it's not functioning and probably will never be, in existing form.
Slightly longer version:
In Croatia, like many other places, railway infrastructure is owned by state, managed by transportation ministry, controlled by transportation safety agency and operated by state owned operator (in this case HŽ Infrastruktura). And a railroad line is defined not by existing infrastructure, but by being listed in appropriate law. In the last railway act reform in Croatia, few years back, they finally managed to kick that line out of the legislation, so it is not longer listed as railroad line. Or most of it, because they kept part of it till Petrinja station listed in the law (due to local pressure). So in the few last HŽ network reports, only the section Caprag - Petrinja is marked Out of operation.
This remaining part might actually be restored some time in the future, because it's only 10 kilometers long with 2 road crossings as major investments, and local government isn't hostile to it, even changing local zoning so that railroad could lead into Sisak proper without stopping in Caprag and having to change direction.
After that law came into power, operator donated remaining steel structures (mostly few remaining smaller bridges between Petrinja and Topusko) to a local NGO, and they "recycled" them.
Some time before that, there was a war, today we call it World War I. Few years before they finally managed to build railroad line Karlovac-Glina-Sisak. When building it, 2 decisions would determine it's future. First, route that was selected was weird, builders chose not to follow Kupa river. Route selected was as long as mainlines via Zagreb, with higher gradient (up to 1.7 - 1.8%) and tight turns, compared to totally flat and straight mainline routes. Second, they built a line to local, vicinal standards, lower speed, lower load. So line couldn't compete on transit traffic with mainline. And after WW1 ended, local bank and subsequently local economy found itself in dire situation. Between two world wars, it was still fairly used because forest railways and ropeways were tied to it, but lower usage led to lower maintenance which led to even lower usage and so on.
It would have been cut in 1960s, when first round of rail lines in Yugoslavia where being cut, had it not been army and it's bases on both ends of the lines. That made it "strategic" asset, but still no investments have been made in maintenance. So by the 80's, speed was limited from 5 to 40 km/h, minimal services, limited to 12-14 tons per axle, etc. If a couple of accidents didn't happen when delivering military equipment, it would stay that way before closure. But they did, so in the late 80s they overhauled section from Karlovac to army bases in Utinja, some 17 km or so of new track, ties, rails... When the war started next year, first thing on that line that got blown up, was a bridge over Kupa, longest on the line. It was located some 14-15 km from Karlovac, on the overhauled section. So some time after, being left with an unusable stub, Croatian railways lifted that remaining track and reused it elsewhere.
When the war ended on one side was a 15km gap, and the rest of the track was in terrible shape. Majority of rails were original ones, 100 years old... There was an attempt to clean up a line from Sisak up to Glina but with nonelectrifed line that goes to nowhere, and with so many other places needing money at the same time, and not the most competent management in charge, it was doomed to fail.
Given HZ have closed a few more minor bits and pieces to save money on maintenance I don't think it will re-open, at least not anytime soon.
The Croatian section of the Sarajevo-Ploče line is now closed on the Croatian side despite the Croatians having upgraded their side of the line not long before the Bosnians did! Now swish Talgos out of Sarajevo run no further than the border station of Capljina.
Metković - Ploče section is open and freight does run on it. Only HŽPP (passenger part of Croatian railways) stopped running trains on that part of network. Which, given that is isolated from rest of its network and that it only serves 2 places with less than 20K population combined, isn't that surprising.