According to Reuters:

Cars will be banned from central Oslo by 2019 to help reduce pollution, local politicians said on Monday, in what they said would be the first comprehensive and permanent ban for a European capital…

Under the plans, the council will build at least 60 kilometers of bicycle lanes by 2019, the date of the next municipal elections, and provide a “massive boost” of investment in public transport.

Several European capitals have previously introduced temporary car bans in their city centers, including Paris last month. Some such as London or Madrid have congestion charges to limit car traffic.