there's a dead end at https://www.openstreetmap.org/way/116124114

some of these railways still existed until Branimirova was being built from Krešimir Sq to Svetice in 00's/10's

there probably also was a connection to Istočni kolodvor, which was for freight and these all led to factories, i'm not sure when Istočni kolodvor was demolished

the last factories were sold off and demolished in the 90's by one party, then in the 00's the other party's mayor let tycoons build apartments there. he lived in one of those buildings ;-)