 Investments included a new track at Holtet Depot, and of new double track in its own right-of-way along Biskop Gunnerus gate from Postgirobygget to Kirkeristen.A double track from Sæter to Ljabru was discarded because there was no need for it.The last of the old trams ran on 22 September, and from 24 September the line was switched from 1,200 to 600 volts.