But while the City Council of Aker wanted the other solution, and was pressing Oslo Sporveier to go to Skøyen, and the Norwegian National Road Administration felt that if Oslo Sporveier wanted to build a trolleybus route to Grorud, they would have to pay for part of the upgrade of Trondheimsveien, a term not acceptable for the company.

Then came World War II with fuel shortage, resulting in the trolleybus being quite popular, as Norway had ample electricity.

But there were other problems, including material shortage and the fear of the German forces confiscating any copper that would be used in the wires.

This resulted in an enormous reduction in public transport ridership, and the same year the Oslo City Council decided to close both the trolleybus and tramway networks.

The plan was to replace all the electrical powered tram and trolleybus routes with the diesel bus, a strategy that would prove fatal when the oil crisis (1973 and 1979) hit in the 1970s.