What sleeper spacings does IR use?
Broad Gauge (See table below.) Most BG mainline sections now have about 1660 sleepers per km (about 60cm spacing); the earlier standard used to be 1538 sleepers per km (about 65cm spacing). BG branch lines may have 1540 sleepers per km (about 65cm spacing) or 1340 sleepers per km (about 75cm spacing); the older standard was 1307 sleepers per km (about 76cm spacing). Minor or lightly used BG lines used to be built with about 1154 sleepers per km (about 87cm spacing). These figures apply mainly to the traditional wooden sleepers.