Every track was added by the hour as the day passed on.

A third track was added to the line between 1914 and 1916.

In the summer of 1985 a third track was added to this section.

These were removed when a 3rd track was added in 1987.

The other two tracks were added to the program in January 2007.

An audio track was added to the film in 1995.

Last 3 tracks were added during its released in 1993.

In 1965, a curtain and track were added to the stage.

During the 1980s, more track and buildings were gradually added.

Stadium lights and a new track were added in 1988.