The railway quickly saw an increase in traffic, with an average 11 percent annual increase from the opening until the mid-1950s. In part to allow access to Kjosfossen, Kjosfossen Station was opened in 1951. By then, ridership had stabilized at 115,000 people per year. A significant portion of the traffic consisted of tourists, in part from cruise ships docked in Flåm. In the latter half of the decade, NSB launched the Norway in a Nutshell package, which included a ride on the Flåm Line. A sleeping car was introduced on the night train between Flåm and Oslo in 1958. It made three trips in each direction per week during the summer season, and achieved an 84 percent occupancy rate. The same year, Berekvam Station became unmanned. Traffic remained stable throughout the 1960s, while interest in developing the railway for tourists declined and local politicians stated that a road was needed to attract tourists to Aurland. The power station was upgraded to in 1969.