What do you mean by sleeper density? What are the various factors which affect the sleeper density?

Sleeper density: Sleeper density is represented as the total number of sleeper per rail length in 1 meter.

Factors affecting sleeper density:

It depends on carrying the axial loads and lateral forces on the railway track.

More number of sleepers provides the more stability to the railway track.

The number of sleeper per rail length, in India from (m + 4) to (m + 7) for main track is used. {Where m = rail length in meter}