Most of the lines around Rimbo still maintained its freight service. Diesel ruled the lines after the last steam engines had lost regular passenger service in 1957 and the last regular freight train Hallstavik - Rimbo - Uppsala stopped using steam engines in 1960. A few "Big Germans" and some smaller tank engines were occasionally used in freight train service or shunting the big Rimbo yard until 1962, when all stem engines but SRJ 28 were scrapped.
On the electrical lines in the south passenger service kept growing, but the freight service was canceled in 1969.
The only exception to the negative
up north was Dannemora - Harg. The line still carried heavy
including iron ore trains. Thus it was converted to standard gauge in
between 1960 and 1970. It was even extended in 1977 with new standard
track from Harg south to the big pulp mill in Hallstavik. This meant
death of the rest of the freight service on the 891 mm gauge in
Shortly after 1977 all narrow gauge tracks north of Rimbo were torn up,
only leaving 33 km between Uppsala and Faringe for a museum railway.
In 1973 the underground connected to Roslagsbanan at Östra Station (underground station Tekniska Högskolan) which improved much for travelers to Stockholm city and beyond. No major changes were made to the train service in the beginning, except removing the last of "big railway luxury" in the trains - the toilets.
Instead plans were made up to replace Roslagsbanan with an extended underground line to Täby (a little further than the junction point in Roslags Näsby) and the rest of the network would be replaced by busses. These plans were confirmed by a county decision in 1975. This generated a lot of local opposition - the people loved their narrow gauge trains even if they were aging (with some motor units dating back to 1919 and a passenger coach to 1899).
Discussions went on for a number of years, while no investment was put into tracks and rolling stock. In 1979 a local referendum showed that a clear majority of the voters northeast of Stockholm wanted to keep and develop Roslagsbanan rather than replacing it with underground and buses. Now even the politicians turned around to support Roslagsbanan.
However, the first step was to abandon the most northern part between Rimbo and Kårsta. Service was stopped in 1981, and the tracks were removed in 1982. The grade has been saved though, enabling a potential retracking of the line. Also the line between Kårsta and Lindholmen did get its death sentence, but was saved due to the bad state of the roads were the replacing buses were to travel.
Finally in 1983 the county decided to keep Roslagsbanan as the main commuter carrier north east of Stockholm. Investments should be made to upgrade the trains and expand the track capacity. A first step was to rebuild some passenger coaches into "control cars" from which the motor cars could be controlled when going in the opposite direction. This way the time for running around the rest of the train at the respective terminals could be saved. From 1984 the normal consist became either three units (Motor car, passenger coach and "control car") or five units (with motor car in the middle and one "control car" at each end). This way the traffic density and total capacity could be increased.
During 1984 a decision was also made to completely replace all rolling stock with new (blue) electric motor cars, passenger coaches and "control cars". The first blue passenger coaches were delivered in 1988 and the first complete train in 1990. Deliveries continued until 1995 when the last of the old "green" rolling stock could be retired. During the early years in the 90ies the rolling stock was a very amusing mix of old and new.
Today, most of the original network is abandoned, but 65 km of the electric lines to the suburbs close to Stockholm remain, and still carry about 25 000 passengers a day in the modern narrow gauge trains.
SRJ can still be found on the line from Uppsala to Faringe
is preserved as a museum railway, Upsala - Lenna Jernväg, ULJ. On
the still active lines close to Stockholm You can ride old electric
preserved by Roslagsbanans Veterantågsförening during the