The given line graph illustrates the number of passenger journeys made on three different railway systems, namely, National rail network, London Underground and Light rail and metro systems in Great Britain from 1950 to 2004/05.
Overall, all three railway networks experienced upward trend with National rail network and London Underground following the same pattern. Meanwhile, the Light rail and metro systems, introduced in the 1960s, remained the less widely used system.
According to the National rail network, the number of passenger journeys began at around 1,000 million journeys in 1950, the figure then hit its highest usage, at 600 millons journeys in the next decade before gradually decrease in the following 20 years. Meanwhile, the number of journeys made on London Underground followed a broadly similar trajectory, starting with 710 trips in 1950, the figure then underwent a slightly drop until early 1980s. At this point, the number of trips on both networks dropped to their lowest levels, with the National Rail Network, which recorded 625 million trips, surpassing the London Underground by 130 million. The two figures then experienced a gradual increase til the end of the period.
By comparison, the Light rail and metro systems were not operated until early 1960s, this railway network transported significantly fewer passengers, at around 15 million journeys, this figure continually decreased and bottom out at approximately zero trips were made in 1980. However, the number of passenger journeys made on Light rail and metro systems gradually rose during the rest of the following years.