Main lines, length in km and average travel time h.min. The article only presented travel time. It is sometimes difficult to decide what is the fastest average travel time, since some trains have different speed in opposite directions, usually due to crossings at single track lines.
Some trains only run once per week or only during summer.
Still, the table should give a fairly good overview. Oslo - Kristiansand became 13 km shorter in 1973, but 1 km longer when Oslo Vest Station was closed. The Roa line is only used twice a week for Bergen trains. Oslo - Trondheim is slower than usual in 1995 because of the construction work for the new Gardermoen line. This was possible earlier, but not in 1995, after a change in the timetable.