UPDATE 02/09/2026: Some travel disruption is expected today due to the funeral preparation for King Harald.  This applies especially in the area around the parliament ("Stortinget"), the National theatre ("Nationaltheatret") and the palace.

If you are planning to visit UiO today, then it is recommended to take the regional train (RE10, RE11, R12 or R13) to Oslo S (Oslo's main station), and then connect by a short well marked walk to T-bane station Jernbanetorget. Then take T-bane 4 ("Vestli") or 5 ("Sognsvann" or "Ringen via Majorstuen").  This service appears to be running as normal.

The tram (trikk) network appear to be significantly disrupted.

The app or website "Ruter.no" appears to be updated, and the most reliable source of information.