This is determined by the engineer designing the track segment and has many factors, the simplest being the Class of track and maximum tonnage trains anticipated, and perhaps maintenance issues. But, it can also be impacted by vicinity of grade crossings, interlockings, and connections to other railroads.
Interlocking joints between railroad tracks are called compromise bars. They are a set of rail joint bars that connect rails of two different sizes.
Trains that run on tracks.
Metal can expand slightly when heated by the sun, a small gap allows the rail to expand, that said modern rail tracks are welded and do not have these gaps.
They are used for trains to ride on them
Rail tracks
No
Rail Road Tracks
ruts
The national Rail journey tracks different trains on all of the tracks in the United States such as the Burlington Northern Santa Fe or Amtrak trains.
Railroad tracks, rails, or rail bed.
Standard Gauge. 4ft 8"
Too allow for expansion when the tracks heat up so they don't buckle.