The proposal, which will be put forward at the party’s annual meeting this weekend, is designed to reduce traffic and improve air quality, by making conventionally-powered models less attractive to own, according to Norwegian newspaper Dagsavisen.

As well as banning petrol and diesel cars, the proposals would reduce the available parking, cut speed limits and improve public transport, cycling and walking routes to alleviate the city’s traffic problems and promote greener travel.

Norway has more electric vehicles per capita than any other country, backed by tax incentives, bus lane access and free parking and charging in the town centre, and the Nissan LEAF is the biggest-selling car so far in 2014 with a 4.6% market share.

However, critics have argued that the technology has been so heavily incentivised that drivers have abandoned public transport and cycling for an electric vehicle, and that the incentives are affecting the flow of buses around the city.