For a railway track, the width of the formation depends upon which of the following?

i. Type of sleepers

ii. Type of ballast

iii. Type of gauge

iv. Number of tracks, i.e. single or double track 

For a railway track, the width of the formation depends upon below mentioned factors:

(1) Type of Gauge:

• The space between the inner faces of the two rails on a railroad track is known as the gauge.
• It has a significant role in establishing a railroad track's formation width. The specifications for the formation width vary throughout gauges.
• In contrast to a narrow gauge track, a broad gauge rail will need a larger formation width.

 (2) Number of Tracks to be put Side by Side:

• The formation width of a railroad track is also influenced by the number of tracks that must be put side by side.
• If more than one track is to be installed, there must be enough room between them to guarantee both functionality and safety.
• More width will be required in the configuration to make room for the extra tracks.

(3) Slope of Sides of Embankment or Cutting:

• The formation width of a railroad track is also influenced by the slope of an embankment or cutting.
• For stability and to stop soil erosion, the slope is crucial.
• A broader formation width could be necessary to preserve stability and stop any encroachment onto the track if the sides have a steeper slope.

Although it can have an indirect impact, the formation width is not directly correlated with the embankment or cutting's side slopes.