As from August 21st, Ruter's zones 2S and 3S will be merged into one zone. This results in cheaper train and bus tickets for travellers between Oslo and Ås.
From now on, a ticket to Ski by bus/train will cost 32,- and to Oslo will cost 52,-. A monthly ticket for students to Oslo will now cost 734,-. Contact Ruter if you have bought a monthly ticket before the price change.
For more information, see: https://ruter.no/en/news/zones-2s-and-3s-merge/